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  • Male  (4,904)
  • Phosphorylation
  • American Association for the Advancement of Science (AAAS)  (5,935)
  • Springer  (57)
  • 1
    Electronic Resource
    Electronic Resource
    Preparation and properties of polyamide-imides derived from 1,3-bis(4-aminophenoxy)benzene, trimellitic anhydride, and various aromatic diamines (1994)
    Springer
    Journal of polymer research 1 (1994), S. 43-49 
    Details
    ISSN: 1572-8935
    Keywords: Poly(amide-imide)s ; Polycondensation ; Phosphorylation ; Aromatic diamines ; 1,3-bis(4-aminophenoxy)benzene ; 1, 3-bis(4-trimellitimidophenoxy)benzene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A diamine, 1,3-bis(4-aminophenoxy) benzene (II), was synthesized in two steps; fist from the condensation of resorcinol with p-chloronitrobenzene in the presence of potassium carbonate, producing I ,3-bis(4-nitrophenoxy) benzene (I), followed by hydrazine hydrate/Pd-C reduction. A two imide rings-preformed dicarboxylic acid, 1,3-bis(4-trimellitimidophenoxy)benzene (III), was prepared from the condensation of diamine II and trimellitic anhydride in 1:2 molar ratio. A series of structurally new polyamide-imides (Va-p) were directly synthesized from the diacid III and various aromatic diamines (IVa-p). The resultant polyamide-imides had inherent viscosities between 0.56–1.39 dl/g. All polymers, except some derived from diamines with p-phenoxy structure, showed excellent solubility. Some polymer resulted in tough or flexible transparent films. Dynamic TG data indicated that all polymers possess excellent thermal stability with no significant weight loss up to the temperature of approximately 450 °C in nitrogen, and their 10% weight loss temperature was recorded in the range of 489–577 °C. Measurements of wide-angle X-ray diffraction revealed that some polymers derived from p-phenoxy group-containing diamines showed crystalline patterns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01378593
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  • 2
    Electronic Resource
    Electronic Resource
    Purification of macrolide 2′-phosphotransferase fromStreptomyces coelicolor Müller (1990)
    Springer
    Journal of industrial microbiology and biotechnology 6 (1990), S. 295-297 
    Details
    ISSN: 1476-5535
    Keywords: Phosphorylation ; Oleandomycin ; Macrolide 2′-phosphotransferase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary An enzyme that catalyzes 2′-O-phosphorylation of oleandomycin and several other macrolide antibiotics has been purified approximately 47-fold from cell-free extracts ofStreptomyces coelicolor Müller, NRRL 3532 (UC™ 5240). The reaction product was verified as being oleandomycin-2′-O-phosphate by mass spectrometry. As a result of purification, the enzyme was separated from two lincosaminide inactivating enzyme activities also present in the cell-free extract.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01575877
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  • 3
    Electronic Resource
    Electronic Resource
    Primary structure of the ribosomal protein gene S6 from Schizosaccharomyces pombe (1988)
    Springer
    Current genetics 13 (1988), S. 57-63 
    Details
    ISSN: 1432-0983
    Keywords: Fission yeast ; Ribosomal protein gene ; Phosphorylation ; Termination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have determined the nucleotide sequence of a ribosomal protein gene which codes for the ribosomal protein S6 (rps6). The sequence analysis revealed that the gene comprises 239 amino acids, giving rise to a basic protein with a molecular weight of 27,502 Da. The product of this gene is the equivalent of the ribosomal protein S1O from Saccharomyces cerevisiae. Northern analyses and S1 mapping of both the 5′ and the 3′ end of the transcripts of this gene show that it is transcribed into three distinct transcripts with different sizes and heterogeneous termini. In the DNA region flanking the coding sequence, several conserved elements are present that may be involved in the transcription initiation and termination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00365757
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  • 4
    Electronic Resource
    Electronic Resource
    Catalysts for the self-polymerization of adenosine cyclic 2′,3′-phosphate (1973)
    Springer
    Journal of molecular evolution 2 (1973), S. 303-316 
    Details
    ISSN: 1432-1432
    Keywords: Polymerization ; Phosphorylation ; Adenosine Cyclic 2′,3′-phosphate ; Oligonucleotides ; Amines ; 2-Aminoethanol ; Amino Acids ; Prebiotic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary When adenosine cyclic 2′,3′-phosphate is evaporated from solution in the presence of simple catalysts such as aliphatic diamines at alkaline pH, and maintained in a dry state at moderate temperatures (25-85°C), self-polymerization to give oligonucleotides of chainlength up to at least 6 is observed. The products contain an excess of [3′→5′]-linkages over [2′→5′]-linkages. The effects of different catalysts and reaction conditions on the efficiency of the reaction are described. The prebiological relevance of these reactions is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01654098
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  • 5
    Electronic Resource
    Electronic Resource
    Geometry of the dry-state oligomerization of 2′,3′-cyclic phosphates (1979)
    Springer
    Journal of molecular evolution 13 (1979), S. 287-293 
    Details
    ISSN: 1432-1432
    Keywords: Phosphorylation ; Prebiotic ; Dinucleoside monophosphorothioate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Evaporation of a solution of thymidine plus either theexo or theendo diastereomer of uridine cyclic 2′,3′-O, O-phosphorothioate (U 〉 p(S) in 1,2-diaminoethane hydrochloride buffer gave the 2′,5′ and 3′,5′ isomers of (P-thio) uridylylthymidine (Up(S)dT) in a ratio of 1:2 with a combined yield of about 20%. These isomers were re-converted to U 〉 p(S) and dT by a reaction that is known to proceed by an in-line mechanism. Both the 2′,5′ and 3′,5′ isomers gave as product the same diastereomer of U 〉 p(S) that had been used originally in their formation. These dry-state ‘prebiotic’ reactions (Verlander, Lohrmann, and Orgel 1973) are thus shown to be stereospecific, and both the 2′,5′ and 3′,5′ internucleotide bonds are formed by an in-line mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01731369
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  • 6
    Electronic Resource
    Electronic Resource
    Further studies of urea-catalyzed phosphorylation reactions (1973)
    Springer
    Journal of molecular evolution 2 (1973), S. 231-234 
    Details
    ISSN: 1432-1432
    Keywords: Phosphorylation ; Nucleotides ; Nucleoside Polyphosphates ; Oligonucleotides ; Urea ; Prebiotic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have analyzed the products formed when mixtures of a nucleoside and ammonium dihydrogen phosphate are heated with an excess of urea. If there is more phosphate than nucleoside in the mixture, compounds containing pyrophosphate bonds are obtained. If uridine, as nucleoside, is in excess over phosphate, di- and oligonucleotides are formed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01654004
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  • 7
    Electronic Resource
    Electronic Resource
    The X-ray induced G2 arrest in mouse eggs: a maternal effect involving a lack of polypeptide phosphorylation (1988)
    Springer
    Development genes and evolution 197 (1988), S. 302-304 
    Details
    ISSN: 1432-041X
    Keywords: Mouse egg ; Maternal effect ; X irradiation ; Cell cycle ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In some strains of mice, eggs when X irradiated during the pronuclear stage, undergo a mitotic block in the G2 phase of the first cell cycle and cleave when the second division takes place in controls. The importance of this effect varies considerably with the strain and depends exclusively on the maternal genotype. In previous work, two-dimensional electrophoresis showed that eggs blocked at the one-cell stage after irradiation, undergo the same modifications in polypeptide synthesis as two-cell controls of the same age, except at the time of normal first mitosis, where three polypeptide sets of 30, 35 and 45 kDa appear only in cleaving controls. In the present study, we have found phosphorylations in dividing controls, on polypeptides of 30, 35 and 45 kDa. These phosphorylations are not seen in blocked irradiated eggs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00380025
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  • 8
    Electronic Resource
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    Tissue-specific requirements for a phosphorylation site in the Fushi tarazu homeodomain (1999)
    Springer
    Development genes and evolution 209 (1999), S. 427-431 
    Details
    ISSN: 1432-041X
    Keywords: Key words Drosophila ; Fushi tarazu ; Homeodomain ; Phosphorylation ; Neurogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The homeodomain protein Fushi tarazu (Ftz) is required for several embryonic patterning processes including segmentation and neurogenesis. During the stages that these processes are regulated the protein is differentially phosphorylated, suggesting that phosphorylation plays a role in helping the protein to regulate different functions in different tissues. We showed in a recent study that one of the Ftz phosphorylation sites, a protein kinase A-type site in the N-terminal arm of the homeodomain, is required for normal Ftz-dependent segmentation. Here we test whether phosphorylation of this site (Thr-263) is also required in the developing central nervous system (CNS). A well-established role for Ftz in the CNS is for the differentiation of neurons referred to as RP2 neurons. Absence of Ftz expression in these cells causes a failure of certain target genes to be expressed and subsequent defects in RP2 differentiation. In contrast to its effect on segmentation, we find that mutation of Thr-263 to Ala (or Asp) has no effect on these CNS functions. This suggests that the phosphorylation state of this site is irrelevant for Ftz function in the CNS, and that there are tissue-specific differences in the requirements for Ftz phosphorylation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004270050273
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  • 9
    Electronic Resource
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    Analysis of potential phosphorylation sites in human T cell leukemia virus type 1 Tax (1999)
    Springer
    Journal of biomedical science 6 (1999), S. 206-212 
    Details
    ISSN: 1423-0127
    Keywords: Tax ; HTLV-1 ; Trans-activation ; Phosphorylation ; Mutagenesis ; Transcription ; Genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The human T cell leukemia virus type 1 (HTLV-1) Tax is a phosphoprotein, however, the contribution of phosphorylation to Tax activity is unknown. Previous studies have shown that phosphorylation of Tax occurs on serine residue(s), within one tryptic fragment, in response to 4β-phorbol-12β-myristate-13α-acetate, in both mouse and human cells. Studies were conducted in multiple cell lines to identify the specific phosphorylated serines as a prelude to functional analysis. The phosphorylation pattern of Tax was found to be different in 293T and COS-7 cells in comparison with MT-4 and Px-1 cells. However, one tryptic fragment remained consistent in comigration analyses among all cell lines. Using selected Tax serine mutants a tryptic fragment containing a serine at residue 113 believed to be the site of phosphorylation of Tax did not comigrate with the common phosphorylated tryptic fragment. Analysis of selected Tax mutants for ability totrans-activate the cytomegalovirus promoter demonstrated mutation of serine 77 to alanine reducedtrans-activation by 90% compared to wild-type Tax. However, examination of the phosphorylation pattern of the serine 77 mutant demonstrated that it is not the site of phosphorylation. These studies demonstrate the importance of using relevant cell lines to characterize the role of phosphorylation in protein function.
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    URL: http://dx.doi.org/10.1007/BF02255904
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  • 10
    Electronic Resource
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    Lack of association between free testosterone and bone density separate from age in elderly males (1993)
    Springer
    Calcified tissue international 52 (1993), S. 67-69 
    Details
    ISSN: 1432-0827
    Keywords: Male ; Osteoporosis ; Free testosterone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary It is unclear what proportion of the variance in bone density in elderly males is accounted for by testosterone status. We studied 112 ambulatory, elderly volunteers (mean age 71.7 years) and determined free testosterone (FT), as well as bone density measurements by photon absorptiometry at multiple sites. Our studies of 35 of these subjects 4 years later includedmorning FT and dual energy X-ray absorptiometry. There were no significant correlations between FT and bone density at multiple scanning sites with the effects of age partialed out. We suspect that our inability to detect a significant effect of FT on bone density was related to the relative strength of other determinants of bone density, as well as to the fact that FT values are far more dynamic than bone density.
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    URL: http://dx.doi.org/10.1007/BF00675629
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  • 11
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    Microsomal casein kinase II in endoplasmic reticulum- and Golgi apparatus-rich fractions of ROS 17/2.8 osteoblast-like cells: An enzyme that modifies osteopontin (1995)
    Springer
    Calcified tissue international 57 (1995), S. 285-292 
    Details
    ISSN: 1432-0827
    Keywords: Casein kinase II ; Osteoblasts ; Osteopontin ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract Osteopontin is an acidic phosphoprotein containing casein kinase II (CKII) phosphorylatable sites and an acidic amino acid cluster. The metabolically 32P-labelings of both serines and threonines in vitro in osteopontin immunoprecipitated from rat osteoblast-like ROS 17/2.8 cells may suggest that casein kinase II catalyzes this modification. The enzyme occurs in microsomal fractions of rat osteoblast-like ROS 17/2.8 cells. Subcellular fractions containing endoplasmic reticulum and Golgi apparatus were isolated by differential centrifugation and were identified according to their ultrastructures and the presence of marker enzymes such as glucose-6-phosphatase and thiamine pyrophosphatase, respectively. Both fractions phosphorylated the partially dephosphorylated osteopontin and the specific substrate peptide RRREEETEEE. Endoplasmic reticulum-catalyzed peptide phosphorylation was 2.7 times lower than that of Golgi although both endoplasmic reticulum- and Golgi-catalyzed peptide reactions were 50% inhibited by 20 and 100 ng/ml heparin, respectively. Western blot analysis revealed that both fractions contained osteopontin and microsomal CKII. Furthermore, microsomal CKII was immunogold-labeled in endoplasmic reticulum and Golgi apparatus. Heparin inhibition and utilization of [γ-32P]GTP as a phosphate donor by both fractions confirmed their capacity to phosphorylate osteopontin. The results suggest that microsomal CKII modifies the acidie matrix proteins during transportation. These matrix phosphoproteins may participate in the mineralization process of hard tissues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00298884
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  • 12
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    Mass-spectrographic analysis of a porcine amelogenin identifies a single phosphorylated locus (1994)
    Springer
    Calcified tissue international 55 (1994), S. 398-400 
    Details
    ISSN: 1432-0827
    Keywords: Enamel ; Proteins ; Phosphorylation ; Amelogenins ; Tooth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract The amelogenins of the extracellular matrix of developing dental enamel, comprise a family of tissue-specific proteins which are postulated to play a central role in the biomineralization of dental enamel [1]. The primary structures of amelogenins derived from cow, pig, human, mouse and rat have now been elucidated by the interpretation of cDNA sequences or by direct amino acid sequence determinations [2–6] demonstrating a high degree of sequence homology between species [1]. However, the nature of post-translational modification of these proteins is less clear. In particular, early reports of amelogenin phosphorylation [7–8] have proved to be difficult to confirm by direct chemical analyses [1]. Using mass spectrographic analysis, we recently [9], reported that the lower molecular weight (5–7 kDa) bovine and porcine amelogenin polypeptides (TRAP and LRAP) contained a single phospho-serine residue at position 16Ser and, since these polypeptides are derived by proteolytic processing from the higher molecular weight “parent” amelogenins (18–25 kDa), we concluded that these precursor molecules must also be phosphorylated, as has previously been suggested [10]. In contrast to these observations, an extensive amino acid sequencing study of porcine amelogenins has recently reported no evidence for such phosphorylation [11]. We now report that a new analysis of the major porcine(“20K”) amelogenin provides positive evidence for porcine amelogenin phosphorylation.
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    URL: http://dx.doi.org/10.1007/BF00299322
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  • 13
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    An acidic modification of the cytoplasmic domain contributes to the charge heterogeneity of the MHC class I antigens (1998)
    Springer
    Immunogenetics 47 (1998), S. 381-389 
    Details
    ISSN: 1432-1211
    Keywords: Key words H2 ; Histocompatibility ; 2-D PAGE ; Glycan ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  Polypeptide phosphorylation and sialylation of the glycan moieties contribute to the charge heterogeneity of the class I major histocompatibility complex glycoproteins. The present study demonstrates that a unique acidic modification unrelated to phosphorylation or glycosylation also affects the charge heterogeneity of the H2-Kk heavy chain of BW5147 lymphoma cells. In vitro cultivation of BW5147 cells results in changes in charge heterogeneity of the H2-Kk heavy chains due to the unique acidic modification. Sequential papain digestion of the 45 000 M r H2-Kk glycoprotein yields a 42 500 M r glycopolypeptide initially, followed by production of a 39 000 M r glycopolypeptide. Results from experiments designed to localize and characterize the novel acidic modification suggest that the modification resides in the segment of the H2-Kk polypeptide located between the two papain cleavage sites. This portion of the polypeptide consists of the transmembrane region and part of the cytoplasmic domain of the H2-Kk heavy chain. At steady state, 25% of the total cell surface H2-Kk possesses this modification. In addition, the modification is mutually exclusive with the phosphorylation of the H2-Kk heavy chain at Ser-333. The possible biological significance of the novel modification of class I antigens is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002510050373
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  • 14
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    The β7 integrin gene (Itgb-7) promoter is responsive to TGF-β1: defining control regions (1998)
    Springer
    Immunogenetics 48 (1998), S. 184-195 
    Details
    ISSN: 1432-1211
    Keywords: Key words β7 integrin gene ; Promoter elements ; TGFβ1 ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  The β7 integrins LPAM-1 (α4β7) and M290 (αEβ7) mediate the homing of lymphocytes to gut-associated lymphoid tissue, and the proposed retention of intraepithelial lymphocytes (IEL), respectively. Here we show that the gut mucosal cytokine TGF- β1 increases the expression of β7 and αE subunit mRNA transcripts and the cell-surface expression of M290 on T cells, and that it decreases the level of α4 integrin transcripts. Induced β7 integrin gene expression was inhibited by the protein tyrosine kinase inhibitor genistein, implicating a role for tyrosine phosphorylation. An analysis of the β7 integrin gene promoter revealed three DNAse I hypersensitivity sites, two of which mapped to the 5′ and 3′ ends of a promoter fragment (nucleotides +690 to +63) that directed both the basal and the TGF-β1-induced expression of a heterologous reporter gene. Deletion analysis identified two TGF-β1 response regions encompassing nucleotides –509 to –398 (TGFBRR1), and –122 to +32 (TGFBRR2). TGFBRR1 interacted with at least five protein complexes, whose binding could be induced with TGF-β1 stimulation and could be antagonized by TGFBRR2 which harbored both similar and distinctive cis-elements. TGFBRR2 interacted specifically with at least two major nuclear protein complexes, whose binding was phosphorylation dependent. These data provide new insights into the mechanism by which TGF-β may switch LPAM-1+ve migrating T cells to express M290, facilitating their retention in the gut.
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    URL: http://dx.doi.org/10.1007/s002510050422
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  • 15
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    Purification of a nitrate reductase kinase from Spinacea oleracea leaves, and its identification as a calmodulin-domain protein kinase (1998)
    Springer
    Planta 206 (1998), S. 435-442 
    Details
    ISSN: 1432-2048
    Keywords: Key words: Calmodulin-domain protein kinase ; Nitrate reductase ; Phosphorylation ; 14-3-3 proteins ; Spinacea (nitrate reductase)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Spinach (Spinacea oleracea L.) nitrate reductase (NR) is inactivated by phosphorylation on serine-543, followed by binding of the phosphorylated enzyme to 14-3-3 proteins. We purified one of several chromatographically distinct NRserine-543 kinases from spinach leaf extracts, and established by Edman sequencing of 80 amino acid residues that it is a calcium-dependent (calmodulin-domain) protein kinase (CDPK), with peptide sequences very similar to Arabidopsis CDPK6 (accession no. U20623; also known as CPK3). The spinach CDPK was recognized by antibodies raised against Arabidopsis CDPK. Nitrate reductase was phosphorylated at serine-543 by bacterially expressed His-tagged CDPK6, and the phosphorylated NR was inhibited by 14-3-3 proteins. However, the bacterially expressed CDPK6 had a specific activity approx. 200-fold lower than that of the purified spinach enzyme. The physiological control of NR by CDPK is discussed, and the regulatory properties of the purified CDPK are considered with reference to current models for reversible intramolecular binding of the calmodulin-like domain to the autoinhibitory junction of CDPKs.
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    URL: http://dx.doi.org/10.1007/s004250050419
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  • 16
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    Sterols of male and female compound inflorescences of Zea mays L. (1976)
    Springer
    Planta 133 (1976), S. 89-93 
    Details
    ISSN: 1432-2048
    Keywords: Zea mays ; Inflorescences ; Male ; Female ; Sterols
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A comparison has been made between the sterols of male and female inflorescences and of pollen from Zea mays. The female inflorescence was shown to contain cholesterol, 24-methylcholesterol, 24-ethyl-5,22-cholestadien-3β-ol, 24-ethylcholesterol and (28Z)-24-ethylidenecholesterol. Themale inflorescence contained the same five compounds together with 24-methylenecholesterol. Pollen contained 24-methylenecholesterol as its main sterol together with lesser amounts of cholesterol, 24-ethylcholesterol, (28Z)-24-ethylidenecholesterol, 24-methylene-5α-cholest-7-en-3β-ol and 4α-methyl-24-methylene-5α-cholest-7-en-3β-ol.
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    URL: http://dx.doi.org/10.1007/BF00386011
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  • 17
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    Gametophytic self-incompatibility inPapaver rhoeas L. (1992)
    Springer
    Sexual plant reproduction 5 (1992), S. 1-7 
    Details
    ISSN: 1432-2145
    Keywords: Self-incompatibility ; Papaver rhoeas ; in vitro system ; Pollen response genes ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have developed an in vitro system whereby we can reproduce the self-incompatibility (SI) reactions ofP. rhoeas in pollen grown in vitro, using stigmatic extracts. This has enabled us to investigate a number of aspects of SI, which would otherwise be difficult. On the stigma side of the reaction, the in vitro system has enabled us to characterize and partially purify the stigmatic S-component, following S-specific activity. It has also enabled us to establish that, in contrast to the S-linked glycoprotein ofNicotiana alata, no detectable ribonuclease activity correlates with the presence of the functional stigmatic S-gene product in this species. Turning to look at the pollen side, we have used the in vitro system to study the metabolic events occurring in the pollen ofP. rhoeas as a consequence of the SI reaction. We have determined that it requires both de novo glyco-sylation and RNA transcription for full inhibition of pollen-tube growth during the SI reaction. Transcription products of pollen SI response genes, which are produced specificially in an incompatible reaction, have been identified. These pollen response genes have been cloned and are currently being characterized. Since the extracellular pollen-stigma interaction results directly in gene transcription in the pollen, it seems likely that a signal transduction mechanism may be operating in the SI response. The in vitro system has allowed us to begin to investigate this possibility. We have detected rapid and transient phosphorylation of certain pollen proteins, together with changes in phosphatase activity during the SI reaction. These studies provide evidence for a role for signal transduction in the SI reaction. Thus, our in vitro system has enabled us to begin to examine, not only stigma and pollen components, but also the interaction between them in the SI reaction.
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    URL: http://dx.doi.org/10.1007/BF00714552
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  • 18
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    Phosphorylation of style S-RNases by Ca2+-dependent protein kinases from pollen tubes (1996)
    Springer
    Sexual plant reproduction 9 (1996), S. 25-34 
    Details
    ISSN: 1432-2145
    Keywords: Self-incompatibility ; S-ribonucleases ; Pollen ; Protein kinases ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Solanaceous plants with gametophytic self-incompatibility produce ribonucleases in the transmitting tract of the style that interact with self-pollen and inhibit its growth. These ribonucleases are a series of allelic products of the S-locus, which controls self-incompatibility. Little is known about the pollen components involved in this interaction or whether a signal transduction pathway is activated during the self-incompatibility response. We have partially purified a soluble protein kinase from pollen tubes of Nicotiana alata that phosphorylates the self-incompatibility RNases (S-RNases) from N. alata but not Lycopersicon peruvianum. The soluble protein kinase (Nak-1) has several features shared by the calcium-dependent protein kinase (CDPK) class of plant protein kinases, including substrate specificity, calcium dependence, inhibition by the calmodulin antagonist calmidazolium, and cross-reaction with monoclonal antibodies raised to a CDPK from soybean. Phosphorylation of S 2-RNase by Nak-1 is restricted to serine residues, but the site(s) of phosphorylation has not been determined and there is no evidence for allele-specific phosphorylation. The microsomal fraction from pollen tubes also phosphorylates S-RNases and this activity may be associated with proteins of Mr∼60 K and 69 K that cross-react with the monoclonal antibody to the soybean CDPK. These results are discussed in the context of the involvement of phosphorylation in other self-incompatibility systems.
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    URL: http://dx.doi.org/10.1007/BF00230363
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  • 19
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    Isolation, characterization, phosphorylation and site of synthesis of Spinacia chloroplast ribosomal proteins (1984)
    Springer
    Current genetics 8 (1984), S. 147-154 
    Details
    ISSN: 1432-0983
    Keywords: Chloroplast ; Ribosomal proteins ; Spinacia oleracea ; Phosphorylation ; Protein synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have characterized the ribosomal proteins from Spinacia chloroplasts using two-dimensional gel electrophoresis. The 30S and 50S subunits contain 23–25 and 36 ribosomal proteins, respectively. In contrast to prokaryotic ribosomes, chloroplast ribosomes contain at least one (and possibly two) phosphorylated ribosomal proteins. Isolated chloroplasts synthesize in the presence of (35S) labeled methionine and cysteine at least seven 30S and thirteen 50S ribosomal proteins which are assembled into (pre)ribosomes. This suggests that about one third of the chloroplast ribosomal proteins is encoded by the chloroplast DNA itself. The identity of several labeled proteins in the two-dimensional gel electrophoretic patterns which did not comigrate with stained chloroplast ribosomal proteins is discussed.
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    URL: http://dx.doi.org/10.1007/BF00420227
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  • 20
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    Phosphorylation of rhodopsin as a possible mechanism of adaptation (1977)
    Springer
    European biophysics journal 3 (1977), S. 175-180 
    Details
    ISSN: 1432-1017
    Keywords: Rodopsin ; Phosphorylation ; Adaptation ; Retina ; Cyclic nucleotides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract Light-induced phosphorylation of rhodopsin has been extensively studied by a number of investigators from a biochemical point of view. However, little is known about the physiological function of this reaction. The slow rates measured for phosphorylation and dephosphorylation suggest that it may be involved in visual adaptation rather than in excitation. This paper presents biochemical data obtained from phosphorylation experiments in isolated photoreceptor membranes as well as in the more physiological system of whole retinas and living animals. An attempt is made to compare the phosphorylation reaction with visual adaptation hypotheses taken from the electrophysiological literature. Finally, effects of cyclic nucleotide metabolism on the sensitivity of photoreceptors are presented and discussed.
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    Isoelectric focusing of phosphorylated cattle rhodopsin (1977)
    Springer
    European biophysics journal 3 (1977), S. 199-203 
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    ISSN: 1432-1017
    Keywords: Rhodopsin ; Isoelectric focusing ; Phosphorylation ; Membrane proteins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract 32P-rhodopsin was partially separated by isoelectric focusing into several fractions of different phosphorylation extent. It was found that the incorporated phosphate is not uniformly distributed in a population of rhodopsin molecules. In a preparation with an average phosphorylation extent of 2.4 moles of phosphate per mole of rhodopsin, most of the 32P-phosphate was found in fractions where 4–5 phosphates are bound per rhodopsin, whereas a large fraction of the total rhodopsin was not phosphorylated at all. The maximum number of phosphate binding sites in rhodopsin appears to be at least five.
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    Light-dependent interactions between rhodopsin and photoreceptor enzymes (1983)
    Springer
    European biophysics journal 9 (1983), S. 231-234 
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    ISSN: 1432-1017
    Keywords: Rhodopsin ; GTP-binding protein ; Phosphorylation ; Photoreceptor membrane ; Photoactivation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract This short review summarizes recent results and hypotheses about the activation mechanism of photoreceptor enzymes via photoexcitation of rhodopsin.
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    Single cardiac outwardly rectifying K+ channels modulated by protein kinase A and a G-protein (1991)
    Springer
    European biophysics journal 20 (1991), S. 281-286 
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    ISSN: 1432-1017
    Keywords: Cardiac K+ channels ; Phosphorylation ; GTP ; GDP ; Neonatal rat heart myocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract Elementary K+ currents were recorded at 19 °C in cell-attached and in inside-out patches excised from neonatal rat heart myocytes. An outwardly rectifying K+ channel which prevented Na+ ions from permeating could be detected in about 10% of the patches attaining (at 5 mmol/l external K+ and between − 20 mV and + 20 mV) a unitary conductance of 66 +- 3.9 pS. K (outw.-rect.) + channels have one open and at least two closed states. Open probability and τopen rose steeply on shifting the membrane potential in the positive direction, thereby tending to saturate. Open probability (at −7 mV) was as low as 3 ± 1% but increased several-fold on exposing the cytoplasmic surface to Mg-ATP (100 μmol/l) without a concomitant change of τopen. No channel activation occurred in response to ATP in the absence of cytoplasmic Mg−+. The cytoplasmic administration of the catalytic subunit of protein kinase A (120–150 μ/ml) or GTP-γ-S (100 μmol/l) caused a similar channel activation. GDP-β-S (100 μmol/l) was also tested and found to be ineffective in this respect. This suggests that cardiac K (outw.-rect.) + channels are metabolically modulated by both cAMP-dependent phosphorylation and a G-protein.
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    Phosphorylation is required for high-affinity binding of DBP, a yeast mitochondrial site-specific RNA binding protein (2000)
    Springer
    Current genetics 37 (2000), S. 356-363 
    Details
    ISSN: 1432-0983
    Keywords: Key words Dodecamer sequence ; RNA binding protein ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract All yeast mitochondrial mRNAs terminate at their 3′ ends with a conserved dodecamer sequence, a site for high-affinity binding by DBP (dodecamer binding protein). Using purified DBP, we show that binding requires an intact dodecamer site and is enhanced by the presence in an oligonucleotide of the immediate 4–5 upstream nucleotides. Binding affinity varied from 0.25 to 0.85 nM towards a set of RNA oligonucleotides containing messenger specific upstream sequences in addition to the dodecamer site. Furthermore, we show that phosphatase treatment of DBP abolishes its specific binding, indicating the involvement of reversible phosphorylation in the regulation of its binding activities. This finding will further our understanding of the mechanism of DBP in the regulation of RNA metabolism in yeast mitochondria.
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    Inhibition of protein phosphorylation by chloroquine (1987)
    Springer
    Archives of microbiology 147 (1987), S. 235-239 
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    ISSN: 1432-072X
    Keywords: Chloroquine ; Yeast ; Fructose-1,6-bisphosphatase ; Phosphorylation ; Protein kinase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The rapid phase of fructose-1,6-bisphosphatase (FBPase) inactivation following glucose addition to starved yeast cells [reported previously] is inhibited on addition of 10 mM chloroquine (CQ) at about pH 8. This inhibition of inactivation was shown to be due to the prevention of phosphorylation of the enzyme. CQ was also found to inhibit general protein phosphorylation in the yeast cells. Glycolysis, as observed by changes in intracellular glucose-6-phosphate and extracellular glucose and ethanol concentrations, was shown to be significantly inhibited in cells treated with CQ. Similarly, a decrease in ATP concentrations was observed. However, during the early stages of phosphorylation of FBPase, levels of ATP were similar in cells containing CQ as in those without CQ. Thus, decrease in ATP levels is not thought to be significantly responsible for the inhibition of protein phosphorylation. However, the phosphorylating activity of cyclic AMP-dependent protein kinases is inhibited in vitro by relatively low concentrations of CQ. Thus, prevention of protein phosphorylation by CQ is believed to be due to inhibition of protein kinases in yeast cells.
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    The influence of light and different ATP concentrations on cell aggregation in cyclic AMP sensitive and insensitive species of the cellular slime molds (1977)
    Springer
    Archives of microbiology 115 (1977), S. 333-337 
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    ISSN: 1432-072X
    Keywords: Dictyostelium ; Cell aggregation ; Illumination ; Phosphorylation ; Cyclic AMP
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The influence of light and different concentrations of ATP on cell aggregation in cyclic AMP sensitive (Dictyostelium mucoroides, D. purpureum) and cyclic AMP insensitive species (Polysphondylium violaceum, P. pallidum, D. lacteum) of the cellular slime molds was observed in small and in large amoebal populations. Both light and ATP (optimal concentration:10-5M) accelerated cell aggregation and increased the number of aggregating centers in large populations. For cyclic AMP sensitive species the effect of ATP in large populations was more pronounced than for the species that do not react to cyclic AMP. A possible explanation for the similar effect of light and ATP has been discussed.
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    Substrate level versus oxidative phosphorylation in the generation of ATP in Thiobacillus denitrificans (1980)
    Springer
    Archives of microbiology 128 (1980), S. 19-25 
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    ISSN: 1432-072X
    Keywords: Phosphorylation ; Thiobacillus denitrificans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Particulate fractions of Thiobacillus denitrificans catalyse the phosphorylation of ADP to ATP during the oxidation of various inorganic sulphur compounds or NADH via an electron transport chain. On the other hand, a “soluble” cell-free fraction synthesized ATP from APS and inorganic phosphate. The production of ATP was verified either by the firefly luciferin-luciferase enzyme system or by the incorporation of 32Pi into ATP. During the oxidation of sulphide, sulphite and NADH the production of ATP from ADP by particulate fractions is inhibited by compounds that inhibit electron transfer and by uncouplers of oxidative phosphorylation. However, these compounds had little effect on the production of ATP from AMP during the oxidation of sulphite by the soluble fraction. NADH was the most effective electron donor for oxidative phosphorylation. The soluble fraction contained high activities of ATP sulphurylase, inorganic pyrophosphatase and adenylate kinase but ADP sulphurylase activity was relatively low. The effects of inhibitors on ATP production from APS and Pi are compared with those on adenylate kinase and ATP sulphurylase.
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    Role of silicon in diatom metabolism (1984)
    Springer
    Archives of microbiology 137 (1984), S. 291-294 
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    ISSN: 1432-072X
    Keywords: Proteins ; Phosphorylation ; Silicon requirement ; Diatom ; Cylindrotheca fusiformis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Proteins of Cylindrotheca fusiformis which incorporated significant 32PO4 were identified as soluble, acidic proteins, and their two-dimensions gel positions were determined. Upon addition of silicate to silicon-starved cells, at least 3 of these proteins showed a significant and rapid change in the level of phosphorylation. Under the same conditions the amount of 32PO4-labeled ATP, ADP, and GTP remained relatively constant. Thus silicon appears to affect phosphorylation and dephosphorylation of specific proteins, and these changes are sufficiently rapid to suggest that phosphorylation may have a role in mediating the silicon requirement for both DNA synthesis and the accumulation of specific mRNAs.
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    Phosphorylation of proteins in Xanthomonas campestris pv. oryzae (1992)
    Springer
    Archives of microbiology 158 (1992), S. 262-266 
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    ISSN: 1432-072X
    Keywords: Bacterium ; Phosphorylation ; Protein kinase ; Xanthomonas campestris pv. oryzae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Protein phosphorylation was studied in Xanthomonas campestris pv. oryzae in vivo and in vitro. In vitro labelling showed that the protein kinases in this bacterium used both ATP and GTP as nucleotide substrates at nearly the same efficiency. At least 6 proteins were phosphorylated in vitro, including abundant species of p81, p44, and p32 with M r of 81000, 44000, and 32000, respectively. Three types of phosphate-protein linkage were found in this bacterium: O-phosphate, N-phosphate and probably acyl phosphate. The p81 and p32 were phosphorylated at histidine. The p44 had mainly phosphoserine and a small part of phosphohistidine. The phosphorylation profile was variable depending on the growth conditions. Furthermore, by a virulent phage Xp10 infection the quantity of phosphorylation increased: for phosphohistinine more than 10-fold, and for phosphoserine about 3-fold. Thus, in this bacterium phosphorylation may be linked with a physiological regulation system and with Xp10 phage development.
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    Phosphorylative fumarate reduction in Vibrio succinogenes: Stoichiometry of ATP synthesis (1981)
    Springer
    Archives of microbiology 129 (1981), S. 100-104 
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    ISSN: 1432-072X
    Keywords: P/fumarate ratio ; Fumarate reduction ; Phosphorylation ; Vibrio succinogenes ; Uncouplers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract 1. Cells of Vibrio succinogenes, treated with EDTA at pH 8, catalyze the phosphorylation of their endogenous ADP and AMP as a function of the electron transport from formate to fumarate. The P/fumarate ratio obtained from the initial velocity of the phosphorylation on initiation of the electron transport and from the activity of fumarate reduction in the steady state was 0.90. The phosphorylation was prevented by 10μmol/g protein carbonylcyanide-3-chlorophenylhydrazone. 2. The esterification of external phosphate in the presence of ADP, hexokinase and glucose is catalysed by a membrane preparation of V. succinogenes in the steady state of fumarate reduction by H2. The phosphorylation was fully abolished by either 5μmol/g protein carbonylcyanide-4-trifluoromethoxyphenylhydrazone or 30μmol/g protein carbonylcyanide-3-chlorphenylhydrazone. Phosphorylation was blocked also by dicyclohexylcarbodiimide, an inhibitor of the Mg2+-dependent membrane bound ATP synthase, and by low concentrations of the inhibitors of electron transport 2-(n-nonyl)-4-hydroxyquinoline-N-oxide or 4-chloromercuriphenylsulfonate. 3. The P/fumarate ratios, measured with the membrane preparation, were found to increase with progressive inhibition of the electron transport from hydrogen to fumarate by means of 4-chloromercuriphenylsulfonate. The extrapolated ratio at vanishing electron transport activity was 0.47. 4. About 50% of the membrane preparation was found to consist of inverted vesicles with the hydrogenase and formate dehydrogenase oriented to the inside. The residual part is considered as being incapable of performing energy transduction. The extrapolated P/fumarate ratio valid for the inverted vesicles was 0.94.
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    Characterization of a GDP-sensitive phosphorylation in plasma membranes ofD. discoideum (1990)
    Springer
    The protein journal 9 (1990), S. 417-425 
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    ISSN: 1573-4943
    Keywords: Phosphorylation ; GDP-stimulated ; developmental regulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In a previous study, we reported the GDP-dependent phosphorylation of a 36 kD membrane protein, p36, inD. discoideum membranes prepared from starved (aggregation competent) cells (Anschutzet al., 1989). Here we show that p36 can be phosphorylated when membranes are supplied either ATP or GTP as the phosphate donor, but that a greater level of p36 phosphorylation is achieved with GTP. The rate of phosphorylation of p36, using either nucleotide triphosphate, is enhanced by GDP. This reflects a decrease in the apparentK m of the enzyme for the particular nucleotide triphosphate. p36 can also be phosphorylated in membranes prepared from vegetative cells. However, the ability of GDP to stimulate p36 phosphorylation is not observed in vegetative cell membranes. Competition experiments indicate that there are also developmental differences in the nucleotide triphosphate site(s) available to phosphorylate p36.
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    Phosphorylation of β-lactoglobulin using amino acids as the sole base and nucleophile of the reaction (1995)
    Springer
    The protein journal 14 (1995), S. 145-150 
    Details
    ISSN: 1573-4943
    Keywords: Phosphorylation ; β-lactoglobulin ; amino acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract β-Lactoglobulin was phosphorylated with 20, 40, and 80 mol of POCl3/mol protein in the presence of 4, 5, and 6 molar excess of basic amino acid per mol POCl3. Maximal phosphorylation yields of 5 and 3 mol P/mol protein were achieved when the highest stoichiometries of POCl3/arginine and lysine were used. Proportional high amounts of basic amino acids were also grafted to the protein molecule during its phosphorylation through the phosphoamide bond. Modified proteins displayed increased negative charges and reduced isoelectric points and were monomeric. The phosphorylated and phosphoamidatedβ-lactoglobulin showed improved functional properties.
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    Characterisation and cloning of a calmodulin-like domain protein kinase from Chlamydomonas moewusii (Gerloff ) (1997)
    Springer
    Planta 202 (1997), S. 76-84 
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    ISSN: 1432-2048
    Keywords: Key words: Calcium ; Calmodulin-like domain protein kinase ; Chlamydomonas ; Flagellum ; Gamete ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Calcium-stimulated protein kinase activity in the flagella of the green alga Chlamydomonas moewusii (Gerloff) was characterised. Using SDS-PAGE and an on-blot phosphorylation assay, a 65-kDa protein was identified as the major calcium-stimulated protein kinase. Its activity was directly stimulated by calcium, a characteristic of the calmodulin-like domain protein kinases (CDPKs). Monoclonal antibodies raised against the CDPKα from soybean cross-reacted with the 65-kDa protein in the flagella, and also with other proteins in the flagellum and cell body. The same monoclonal antibodies were used to screen a C. moewusii cDNA expression library in order to isolate CDPK cDNAs from C. moewusii. The CCK1 cDNA encodes a protein with a kinase and calmodulin-like domain linked by a junction domain typical of CDPKs. From Southern analyses, evidence was obtained for a CDPK gene family in C. moewusii and C. reinhardtii.
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    Sterols of male and female flowers of Cucumis sativus (1977)
    Springer
    Planta 134 (1977), S. 115-117 
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    ISSN: 1432-2048
    Keywords: Female ; Flowers ; Male ; Meiosis ; Sterols
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sterols of male and female flowers of Cucumis sativus L. were similar in composition. The principal compound was 24ξ-ethyl-5α-cholesta-7,22-dien-3β-ol. Five other 5α-Δ7 were detected: 24ξ-methyl-7-ene, 24ξ-ethyl-7-ene, 24-ethyl-7,24(28)Z-diene, 24ξ-ethyl-7,25-diene and 24ξ-ethyl-7,22,25-triene. Small amounts of Δ5 (cholesterol, 24ξ-methylcholesterol and 24ξ-ethylcholesterol) were detected. The possible significance of these sterols is discussed.
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    Structure and function of amiloride-sensitive Na+ channels (1995)
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    The journal of membrane biology 143 (1995), S. 1-18 
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    ISSN: 1432-1424
    Keywords: Phosphorylation ; Planar lipid bilayers ; Kidney ; Membrane proteins ; Antibodies ; Lipidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary A new molecular biological epoch in amiloride-sensitive Na+ channel physiology has begun. With the application of these new techniques, undoubtedly a plethora of new information and new questions will be forthcoming. First and foremost, however, is the question of how many discrete amiloride-sensitive Na+ channels exist. This question is important not only for elucidating structure-function relationships, but also for developing strategies for pharmacological or, ultimately, genetic intervention in such diseases as obstructive nephropathy, Liddle's syndrome, or salt-sensitive hypertension where amiloride-sensitive Na+ channel dysfunction has been implicated [17, 62]. Epithelia Na+ channels purified from kidney are multimeric. However, it is not yet clear which subunits are regulatory and which participate directly as a part of the Na+ conducting core and what is the nature of the gate. The combination of electrophysiologic techniques such as patch clamp and the ability to study reconstituted channels in planar lipid bilayers along with molecular biology techniques to potentially manipulate the individual subunits should provide the answers to questions that have puzzled physiologists for decades. It seems clear that the robust versatility of the channel in responding to a wide range of differing and potentially synergistic regulatory inputs must be a function of its multimeric structure and relation to the cytoskeleton. Multiple mechanisms of regulation imply multiple regulatory sites. This hypothesis has been validated by the demonstration that enzymatic carboxyl methylation and phosphorylation have both individual and synergistic effects on the purified channel in planar lipid bilayers. Of the multiple mechanisms proposed for channel regulation, evidence is now available to support the ideas that channels may be activated (or inactivated) by direct modifications including phosphorylation and carboxyl methylation, by activation or association of regulatory proteins such as G proteins, and by recruitment from subapical membrane domains. The observation that channel gating is achieved primarily through regulation of open probability without alterations in conductance may simplify future understanding of the molecular events involved in gating once the regulatory sites have been identified. As more Na+ channels or Na+ channel subunits are cloned from different epithelia, it will become possible to piece together the puzzle of epithelial Na+ channels. It is interesting to observe that renal Na+ channel proteins contain a subunit which falls into the 70 kD range. This size protein is in the range reported for the aldosterone-induced proteins [12, 46, 153]. Recent reports indicate that polyclonal antibodies directed against the bovine renal Na+ channel cross-react with GP70, an aldosterone-induced protein [149], especially in light of the recent cloning of an epithelial Na+ channel whose subunit sizes are 70–80 kD [24, 25]. It is tempting to speculate that this size polypeptide forms the basic building block of amiloride-sensitive Na+ channels, which can then be subsequently modified and custom-tailored in different epithelia by the addition of various other associated regulatory proteins.
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    Characterization of the gap junction protein, connexin45 (1994)
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    The journal of membrane biology 139 (1994), S. 31-40 
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    ISSN: 1432-1424
    Keywords: Connexin45 ; Gap junction ; Intercellular communication ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Connexin45 is a gap junction protein which forms channels with unique characteristics. RNA blots demonstrated that connexin45 is expressed in a number of cell lines including WB, SK Hepl, BHK, A7r5, CLEM, and BWEM cells. Connexin45 was further studied in BWEM cells using specific affinity-purified antibodies directed against a synthetic peptide representing amino acids 285–298 of its sequence. Immunofluorescence experiments demonstrated that the BWEM cells expressed both connexin43 and connexin45 and that these connexins colocalized. Connexin45 polypeptide, immunoprecipitated from BWEM cells metabolically labeled with [35S]-methionine, consisted of a predominant 48 kD polypeptide. Connexin45 and connexin43 contained radioactive phosphate when immunoprecipitated from BWEM cells metabolically labeled with [32P]-orthophosphoric acid. This phosphate label was removed from connexin45 by alkaline phosphatase digestion. Treatment of BWEM cells with the tumor promoting agent 12-O-tetradecanoylphorbol-13-acetate (TPA) inhibited intercellular passage of microinjected Lucifer yellow. While TPA treatment induced phosphorylation of connexin43 in these cells, it reduced the expression of connexin45. Furthermore, the connexin45 expressed after TPA treatment was not phosphorylated. These results suggest that treatments which alter protein phosphorylation may regulate connexin43 and connexin45 in BWEM cells by different mechanisms.
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    Characterization of anther differentiation in cytoplasmic male sterile maize using a specific isozyme system (esterase) (1984)
    Springer
    Theoretical and applied genetics 67 (1984), S. 469-473 
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    ISSN: 1432-2242
    Keywords: Maize ; Pollen anther ; Esterase ; Male ; sterility ; Restorer genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary During anther development, characterized in maize plants with N cytoplasm, certain esterase isozymes in non-microspore cells decrease in amount with anther age and new isozymes appear in the developing microspores. In anthers from male sterile plants with cms T or cms C cytoplasm, neither of these changes in esterase patterns occurred. In anthers from plants with cms S cytoplasm, the decrease in the esterases of non-microsporogenous cells was observed but not the appearance of microspore esterases. In lines carrying cms S cytoplasm and nuclear restorer genes, esterase changes during anther development were as in normal fertile anthers. These results are discussed with respect to the phenomenon of cytoplasmic male sterility in the different maize genotypes.
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    The ultrastructure of the pars distalis of the hypophysis in males of Triturus cristatus carnifex Laur., treated with the antiandrogen cyproterone acetate (1973)
    Springer
    Cell & tissue research 137 (1973), S. 209-221 
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    ISSN: 1432-0878
    Keywords: Pituitary gland ; Male ; Triturus cristatus carnifex Laur. ; “Globular basophil cells” ; Antiandrogen treatment ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The adenohypophysis of the newt Triturus cristatus carnifex Laur. shows three types of cells: 1) cells with granules of about 350–550 mμ in diameter, 2) cells with small granules of 200–250 mμ in diameter and globules with a cristal-like arrangement containing cylinders with a diameter of about 960 Å and 3) cells containing small granules only. The AA. discuss the ultrastructural changes of the gland and the modifications of sexual secondary characters (S.S.C.) in animals given Cyproterone acetate (1/2 mg every three days). The animals have been treated for a period of time varying between 3 and 5 months, starting in October-November, when S.S.C. begin to develop again. At the end of the treatment the newths showed a loss of S.S.C., and the ultrastructure of the adenohypophysis resembled that of castrated animals, i.e.: great swelling of R.E.R. and partial degranulation of glycoprotein secreting cells which contain the 200 mμ granules and the globules. The S.E.R. showed also swelling and hyperactivity.
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    Neurofilaments in rat and cat spinal cord; a comparative immunocytochemical study of phosphorylated and non-phosphorylated subunits (1993)
    Springer
    Cell & tissue research 272 (1993), S. 249-256 
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    ISSN: 1432-0878
    Keywords: Spinal cord ; Motoneurones ; Dorsal horn ; Neurofilament ; Phosphorylation ; Immunocytochemistry ; Rat ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Neurofilament immunoreactivity was examined in spinal cords of rats and cats with antibodies to all three subunits (68 kD, 155 kD and 200 kD) and to different phosphorylation states of 200 kD. NFHP-, an antibody against non-phosphorylated 200 kD, labelled all rat neuronal perikarya but failed to labet cat neurofilaments. In both species, the perikarya and processes of motoneurones were immunoreactive for all three subunits but most dorsal horn neuronal perikarya were not immunoreactive for 68 kD and 155 kD. Motoneuronal perikarya and proximal processes showed filamentous labelling for 68 kD but not for 155 kD in the rat, while in neither species did these show labelling with RT97, an antibody against a highly phosphorylated form of 200 kD; immunoreactivity for 200 kD was present in both filamentous (probably partially phosphorylated) and non-filamentous (non-phosphorylated) forms, but in dorsal horn neurones only the latter was present. Interpretations consistent with this data are: in rat and possibly also cat, motoneuronal neurofilaments consist of a 68 kD backbone with partially phosphorylated 200 kD sidearms, with both 155 kD and 200 kD (non-phosphorylated) subunits in a non-filamentous form; this neurofilament becomes more highly phosphorylated along the proximal processes. The dorsal horn neurones probably contain 200 kD in a non-filamentous form but may lack the other subunits.
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    Qualitative and quantitative comparison of the distribution of phosphorylated and non-phosphorylated neurofilament epitopes within central and peripheral axons of adult hamster (Mesocricetus auratus) (1991)
    Springer
    Cell & tissue research 263 (1991), S. 265-270 
    Details
    ISSN: 1432-0878
    Keywords: Neurofilaments ; Phosphorylation ; Axon ; Immunocytochemistry ; Golden syrian hamster, Mesocricetus auratus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The distribution of phosphorylated and nonphosphorylated neurofilament epitopes was determined immunocytochemically in adjacent 2 μm-thick sections of sciatic nerve, ventral root and spinal cord. Staining was scored as either intense, moderate or absent and the proportion of labeled axons was calculated for each category. Nearly all sciatic nerve and ventral root axons were immunoreactive with both antibodies against phosphorylated and non-phosphorylated neurofilaments and there were no significant differences in the number of intensely- or moderately-labeled axons. Within the spinal cord however, while the majority of large caliber axons was stained with both antibodies, there was a significant number of small caliber axons which stained only with antibodies against phosphorylated neurofilaments. These results show that phosphorylated and nonphosphorylated neurofilaments are extensively codistributed in CNS and PNS axons, and that in the CNS, staining intensity for non-phosphorylated epitopes is less in the smaller axons.
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    Monoclonal antibodies SMI 311 and SMI 312 as tools to investigate the maturation of nerve cells and axonal patterns in human fetal brain (1998)
    Springer
    Cell & tissue research 291 (1998), S. 433-443 
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    ISSN: 1432-0878
    Keywords: Key words: Neurofilaments ; Phosphorylation ; Differentiation ; Immunocytochemistry ; Brain storage ; Fixation ; Microwave ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  Neurofilaments, which are exclusively found in nerve cells, are one of the earliest recognizable features of the maturing nervous system. The differential distribution of neurofilament proteins in varying degrees of phosphorylation within a neuron provides the possibility of selectively demonstrating either somata and dendrites or axons. Non-phosphorylated neurofilaments typical of somata and dendrites can be visualized with the aid of monoclonal antibody SMI 311, whereas antibody SMI 312 is directed against highly phosphorylated axonal epitopes of neurofilaments. The maturation of neuronal types, the development of area-specific axonal networks, and the gradients of maturation can thus be demonstrated. Optimal immunostaining with SMI 311 and SMI 312 is achieved when specimens are fixed in a mixture of paraformaldehyde and picric acid for up to 3 days and sections are incubated free-floating. Neurons, with their dendritic domains immunostained by SMI 311 in a Golgi-like manner, can be completely visualized in relatively thick sections. The limitations of Golgi-preparations, such as glia-labeling, artifacts, and the staining of only a small non-representative percentage of existing neurons, are not apparent in SMI preparations, which additionally provide the possibility of selectively staining axonal networks. The results achieved in normal fetal brain provide the basis for studies of developmental disturbances.
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    The role of Cdc25 phosphatases in cell cycle checkpoints (2000)
    Springer
    Protoplasma 211 (2000), S. 8-11 
    Details
    ISSN: 1615-6102
    Keywords: Cdc25 phosphatase ; Cell cycle ; DNA damage ; Checkpoint ; Cyclin-dependent kinase ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The major driving forces in the eukaryotic cell cycle are the cyclin-dependent kinases (Cdk). Cdks can be activated through dephosphorylation of inhibitory phosphorylations catalyzed by the Cdc25 phosphatase family. In higher-eukaryotic cells, there exist three Cdc25 family members, Cdc25A, Cdc25B, and Cdc25C. While Cdc25A plays a major role at the G1-to-S phase transition, Cdc25B and C are required for entry into mitosis. The regulation of Cdc25C is crucial for the operation of the DNA-damage checkpoint. Two protein kinases, Chk1 and Cds1, can be activated in response to DNA damage or in the presence of unreplicated DNA. Chk1 and Cds1 may phosphorylate Cdc25C to prevent entry into mitosis through inhibition of Cdc2 (Cdk1) dephosphorylation.
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    Phosphorylation of neuronal microtubule proteins (1988)
    Springer
    Protoplasma 145 (1988), S. 82-88 
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    ISSN: 1615-6102
    Keywords: Tubulin ; Microtubule-associated proteins ; Phosphorylation ; Neuronal differentiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Phosphorylation of microtubule protein was tested during differentiation in neuroblastoma cells. Two microtubule proteins were modified, β-tubulin and MAP-1 B. In the first case less than one mol of phosphate was incorporated per mol of protein, whereas several residues were phosphorylated in MAP-1 B. The localization of the phosphorylated residue of β-tubulin indicated that it is present in an isoform, at its carboxy-terminal region, and probably correspond to the serine 444. When comparing thein vivo phosphorylation of tubulin with that produced by casein kinase IIin vitro, a similar pattern was obtained. A similar result was found upon the comparison of the phosphorylation pattern of MAP-1 B after phosphorylationin vivo andin vitro using casein kinase II. These results suggest a role for casein kinase II in the phosphorylation of microtubule proteins in neuroblastoma cells. A result similar to that found for neuroblastoma cells was found after injection of [32P]phosphate into the brain of seven-day-old rats; however, a more complex pattern was found for the phosphorylationin vivo in adult rats.
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    Physarum myosin light chain one: A potential regulatory factor in cytoplasmic streaming (1981)
    Springer
    Protoplasma 109 (1981), S. 13-21 
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    ISSN: 1615-6102
    Keywords: Actomyosin ; Cytoplasmic streaming ; Myosin light chains ; Phosphorylation ; Physarum polycephalum ; Regulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Physarum myosin is composed of a heavy chain of about 225,000 daltons and two small polypeptides of 17,700 and 16,100 daltons, called light chain one (LC 1) and two (LC 2). Light chain one is shown to belong to the general class of regulating light chains by two independent criteria. After denaturation, purification and renaturation of thePhysarum light chains only LC 1 will combine with scallop myofibrils in which one myosin regulatory light chain has been removed. This LC 1 can restore inhibition of the ATPase activity of the myofibrils at 10−8 M Ca++ just as well as light chains from rabbit skeletal myosin. Secondly, this LC 1 is the only component of the myosin that is significantly phosphorylated by an endogenous kinase present in crude actomyosin. An active phosphatase is also present. Preliminary results could not detect calcium sensitivity for either kinase or phosphatase, nevertheless the importance of phosphorylation in affecting activity of biological systems suggests that LC 1 may serve some regulating function for plasmodial actomyosin.
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    Phosphorylation of a putative myosin light chain inChara by calcium-dependent protein kinase (1992)
    Springer
    Protoplasma 171 (1992), S. 85-88 
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    ISSN: 1615-6102
    Keywords: Ca2+-dependent protein kinase ; Chara ; Cytoplasmic streaming ; Myosin light chain ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Ca2+-dependent protein kinase (CDPK) has been proposed to mediate inhibition by Ca2+ of cytoplasmic streaming in the green algaChara. We have identified the in vivo substrate(s) of CDPK inChara by using vacuolar perfusion of individual internodal cells with [γ-32P]ATP. Phosphorylation of several polypeptides is enhanced when perfusions are performed at 10−4M free Ca2+ compared to 〈10−9M free Ca2+. The Ca2+-stimulated phosphorylation of these proteins is inhibited by the presence of a monoclonal antibody to soybean CDPK. One of these proteins is 16 to 18kDa and is recognized by an antibody against gizzard myosin light chains. These results demonstrate that inChara, several polypeptides are phophorylated by CDPK and one of these proteins has been tentatively identified as a myosin light chain. These observations support the hypothesis that Ca2+-regulated phosphorylation of myosin is involved in the regulation of cytoplasmic streaming.
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    An update on fibrous flagellar roots in green algae (1991)
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    Protoplasma 164 (1991), S. 38-44 
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    ISSN: 1615-6102
    Keywords: Flagellate green algae ; Fibrous flagellar roots ; System II fibres ; System I fibres ; Centrin ; Assemblin ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In flagellate green algae two types of fibrous flagellar roots can be distinguished: system I fibres, cross-striated bundles of 2nm filaments (striation periodicity about 30 nm), which are associated with flagellar root microtubules, and system II fibres, contractile bundles of 4–8 nm filaments which are often cross-striated (striation periodicity variable but greater than 80 nm). The major protein of system II fibres is centrin, a Ca2+-modulated phosphoprotein, which is a member of the EF-hand protein family. The major protein of system I fibres (of severalChlamydomonas-type green algae) is a 34 kDa phosphoprotein, named assemblin. Because of the solubility characteristics of system I fibres and the properties of their major protein (paracrystal-formation in vitro, several isoelectric variants, heptad motifs in parts of the amino acid sequence), assemblin is presumably related to the k-m-e-f class of α-helical fibrous proteins.
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    The photosystem II subunit CP29 can be phosphorylated in both C3 and C4 plants as suggested by sequence analysis (1998)
    Springer
    Plant molecular biology 36 (1998), S. 11-22 
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    ISSN: 1573-5028
    Keywords: chlorophyll a/b protein ; CP29 ; Phosphorylation ; Photosystem II ; cold stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The CP29 subunit of Photosystem II is reversibly phosphorylated in Zea mays upon exposure to high light in the cold (Bergantino et al., J Biol Chem 270 (1995) 8474–8481). This phenomenon was previously proposed to be restricted to C4 plants. We present the complete sequence of the CP29 protein, deduced from a maize Lhcb4 cDNA clone, and its comparison with the previously known Lhcb4 sequences of two C3 plants: Hordeum vulgare and Arabidopsis thaliana. Despite the relatively low degree of homology in their amino-terminal region, i.e. the part of the molecule which is phosphorylated in maize, the three polypeptides conserve consensus sequences for the site of phosphorylation. We proved by immunoblotting and 33P-labelling that the same post-translational modification occurs in barley. Being thus common to C3 and C4 plant species, the phosphorylation of this minor antenna complex of Photosystem II appears now as a widespread phenomenon, possibly part of the phosphorylation cascade which signals the redox status of the plastoquinone to the nuclear transcription apparatus. Arabidopsis plants do not show phosphorylation of CP29 in the same conditions, but other low-molecular-weight phosphoproteins, whose role need to be elucidated, become evident.
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    Isolation and characterization of a phosphoprotein phosphatase type 2A gene from alfalfa (1993)
    Springer
    Molecular genetics and genomics 240 (1993), S. 126-131 
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    ISSN: 1617-4623
    Keywords: Cell cycle ; Medicago sativa ; Phosphorylation ; Mitosis ; Phosphatase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phosphoprotein phosphatases are central regulatory components of the cell cycle in eukaryotes. We report the cloning and sequencing of an alfalfa phosphoprotein phosphatase type 2A (pp2aMs) cDNA. The predicted protein sequence shows high similarity to PP2A from Brassica napus, rabbit and Drosophila. No changes in pp2aMs mRNA abundance during the cell cycle were found. During growth of a batch cell culture, mRNA levels decreased gradually. In planta, all organs contained pp2a transcripts but maximal mRNA levels were detected in stems. Since Southern analysis indicated the presence of a small pp2a gene family in alfalfa, it appears that different subtypes may have specialized roles in various tissues and developmental situations which await characterization.
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    Osmoregulation of the fatty acid receptor gene fadL in Escherichia coli (1993)
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    Molecular genetics and genomics 240 (1993), S. 339-347 
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    ISSN: 1617-4623
    Keywords: OmpR ; EnvZ ; Phosphorylation ; Transcriptional control ; DNA binding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The fadL gene of Escherichia coli codes for an outer membrane protein that is involved in the uptake of long-chain fatty acids. Uptake is regulated by environmental osmolarity, and decreases when the cells are grown under conditions of high osmolarity. A temperature-sensitive mutant that requires fatty acid for growth at 42° C was unable to grow at the high temperature even in the presence of fatty acid if the medium contained 10% sucrose. Promoter activity of the fadL gene in vivo was repressed by high osmolarity in a FadR repressor null mutant. Furthermore, in vitro transcription of the fadL gene was strongly repressed by the addition of OmpR and EnvZ proteins. The results of gel retardation and DNase I protection experiments indicated that OmpR, after incubation with the protein kinase EnvZ, specifically binds to at least four sites around the fadL promoter, two upstream and two downstream from the transcriptional start site. These results suggest that transcription of the fadL gene is osmotically regulated by the OmpREnvZ two-component system.
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    Phosphorylation/dephosphorylation steps are key events in the phytochrome-mediated enhancement of nitrate reductase mRNA levels and enzyme activity in maize (1996)
    Springer
    Molecular genetics and genomics 251 (1996), S. 599-608 
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    ISSN: 1617-4623
    Keywords: Key words Nitrate reductase ; Phytochrome ; Phosphorylation ; Protein kinase C ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  We provide evidence to show that the increase in nitrate reductase (NR) transcript level stimulated by red light is mediated via a phosphorylation-dependent step. The light-stimulated enhancement of NR transcript level was significantly inhibited by H-7, a protein kinase inhibitor, whereas okadaic acid (OKA), a phosphatase inhibitor, had no effect. Phorbol myristate acetate (PMA), an activator of protein kinase C (PKC) enhanced the NR transcript level in dark-grown leaves. No correlation between changes in NR transcript level and NR activity (NRA) was observed. Inhibition of NRA by OKA and stimulation by H-7 indicated that NRA is increased by dephosphorylating the enzyme. We have identified a protein kinase (C type) that can phosphorylate the purified NR in vitro without the involvement of other accessory proteins. By in vivo labelling with 32P and immunoprecipitation of NR with NR antibodies it was found that in the presence of OKA most NR protein (NRP) was present in phosphorylated state, while with H-7 the reverse was seen. The red (R) and far-red (FR) light reversible experiments suggested that phytochrome (Pfr, an active form) stimulation of NRA is mediated by dephosphorylation of the enzyme, suggesting that Pfr regulates both NR transcription and NRA via phosphorylation/dephosphorylation steps controlled by separate signal transduction pathways.
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    Phosphorylation/dephosphorylation steps are key events in the phytochrome-mediated enhancement of nitrate reductase mRNA levels and enzyme activity in maize (1996)
    Springer
    Molecular genetics and genomics 251 (1996), S. 599-608 
    Details
    ISSN: 1617-4623
    Keywords: Nitrate reductase ; Phytochrome ; Phosphorylation ; Protein kinase C ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We provide evidence to show that the increase in nitrate reductase (NR) transcript level stimulated by red light is mediated via a phosphorylation-dependent step. The light-stimulated enhancement of NR transcript level was significantly inhibited by H-7, a protein kinase inhibitor, whereas okadaic acid (OKA), a phosphatase inhibitor, had no effect. Phorbol myristate acetate (PMA), an activator of protein kinase C (PKC) enhanced the NR transcript level in darkgrown leaves. No correlation between changes in NR transcript level and NR activity (NRA) was observed. Inhibition of NRA by OKA and stimulation by H-7 indicated that NRA is increased by dephosphorylating the enzyme. We have identified a protein kinase (C type) that can phosphorylate the purified NR in vitro without the involvement of other accessory proteins. By in vivo labelling with32P and immunoprecipitation of NR with NR antibodies it was found that in the presence of OKA most NR protein (NRP) was present in phosphorylated state, while with H-7 the reverse was seen. The red (R) and far-red (FR) light reversible experiments suggested that phytochrome (Pfr, an active form) stimulation of NRA is mediated by dephosphorylation of the enzyme, suggesting that Pfr regulates both NR transcription and NRA via phosphorylation/dephosphorylation steps controlled by separate signal transduction pathways.
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    Low temperature-stimulated phosphorylation regulates the binding of nuclear factors to the promoter of Wcs120, a cold-specific gene in wheat (1998)
    Springer
    Molecular genetics and genomics 257 (1998), S. 157-166 
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    ISSN: 1617-4623
    Keywords: Key words Cold ; Phosphorylation ; Promoter ; Transcription ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Wcs120 gene encodes a highly abundant protein which appears to play an important role during cold acclimation of wheat. To understand the regulatory mechanism controlling its expression at low temperature, the promoter region has been characterized. Electrophoretic mobility shift assays using short promoter fragments revealed the presence in nuclear extracts from non-acclimated (NA) plants of multiple DNA-binding proteins which interact with several elements. In contrast, no DNA-binding activity was observed in the nuclear extracts from cold-acclimated (CA) plants. In vitro dephosphorylation of these CA nuclear extracts with alkaline phosphatase restored the binding activity. Moreover, okadaic acid (a potent phosphatase inhibitor) markedly stimulated the in vivo accumulation of the WCS120 family of proteins. This suggests that protein phosphatases PP1 and/or PP2A negatively regulate the expression of the Wcs120 gene. In addition, both Ca2+-dependent and Ca2+-independent kinase activities were found to be significantly higher in the CA nuclear extracts. Western analysis using antibodies directed against protein kinase C (PKC) isoforms showed that a PKCγ homolog (84 kDa) is selectively translocated into the nucleus in response to low temperature. Taken together, our results suggest that, in vivo, the expression of the Wcs120 gene may be regulated by nuclear factors whose binding activity is modulated by a phosphorylation/dephosphorylation mechanism.
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    Cloning of the gene encoding the catalytic subunit of casein kinase II from the yeast Yarrowia lipolytica (1997)
    Springer
    Molecular genetics and genomics 256 (1997), S. 355-364 
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    ISSN: 1617-4623
    Keywords: Key wordsYarrowia lipolytica ; Casein kinase II ; Phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Casein kinase II from the yeast Yarrowia lipolytica is a heterotetramer of the form αα′β2. We report on the cloning and sequencing of a partial cDNA and of the complete genomic DNA coding for the catalytic α subunit of the casein kinase II from this yeast species. The sequence of the gene coding for this enzyme has been analyzed. No intron was found in the gene, which is present in a single copy. The deduced amino acid sequence of the gene shows high similarity with those of α subunit described in other species, although, uniquely, Y. lipolytica CKIIα lacks cysteines. We find that the α subunit sequence of Y. lipolytica CKII is shown greater homology with the corresponding protein from S. pombe than with that from S. cerevisiae. We have analyzed CKIIα expression and CKIIα activity. We show that expression of this enzyme is regulated. The catalytic subunit is translated from a single mRNA, and the enzyme is present at a very low level in Y. lipolytica, as in other yeasts.
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    ATP formation onset lag and post-illumination phosphorylation initiated with single-turnover flashes. III. Characterization of the ATP formation onset lag and post-illumination phosphorylation for thylakoids exhibiting localized or bulk-phase delocalized energy coupling (1988)
    Springer
    Journal of bioenergetics and biomembranes 20 (1988), S. 129-154 
    Details
    ISSN: 1573-6881
    Keywords: Phosphorylation ; localized energy coupling ; delocalized energy coupling ; proton gradients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Physics
    Notes: Abstract When 100 mM KCl replaced sucrose in a chloroplast thylakoid stock suspension buffer, the membranes were converted from a localized proton gradient to a delocalized proton gradient energy coupling mode. The KCl-suspended but not the sucrose-suspended thylakoids showed pyridine-dependent extensions of the ATP onset lag and pyridine effects on post-illumination phosphorylation. The ATP formation assays were performed in a medium of identical composition, using about a 200-fold dilution of the stock thylakoid suspension; hence the different responses were due to the pretreatment, and not the conditions present in the phosphorylation assay. Such permeable buffer effects on ATP formation provide a clear indicator of delocalized proton gradients as the driving force for phosphorylation. The pyridine-dependent increases in the onset lags (and effects on post-illumination phosphorylation) were not due to different ionic conductivities of the membranes (measured by the 515 nm electrochromic absorption change), H+/e − ratios, or electron transport capacities for the two thylakoid preparations. Thylakoid volumes and [ 14C]pyridine equilibration were similar with both preparations. The KCl-induced shift toward a bulk-phase delocalized energy coupling mode was reversed when the thylakoids were placed back in a low-salt medium. Proton uptake, at the ATP-formation energization threshold flash number, was much larger in the KCl-treated thylakoids and they also had a longer ATP formation onset lag, when no pyridine was present. These results are consistent with the salt treatment exposing additional endogenous buffering groups for interaction with the proton gradient. The concomitant appearance of the pyridine buffer effects implies that the additional endogenous buffering groups must be located on proteins directly exposed in the aqueous lumen phase. Kinetic analysis of the decay of the post-illumination phosphorylation in the two thylakoid preparations showed different apparent first-order rate constants, consistent with there being two different compartments contributing to the proton reservoirs that energize ATP formation. We suggest that the two compartments are a membrane-phase localized compartment operative in the sucrose-treated thylakoids and the bulk lumen phase into which protons readily equilibrate in the KCl-treated thylakoids.
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    Pheromone-induced phosphorylation of antennal proteins from insects (1994)
    Springer
    Journal of comparative physiology 164 (1994), S. 76-80 
    Details
    ISSN: 1432-136X
    Keywords: Insect antennae ; Pheromones ; Second messenger ; Phosphorylation ; Moth,Heliothis virescens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Protein kinase C inhibitors, such a calphostin C, abolish the transient nature of pheromone-induced rapid inositol 1,4,5-triphosphate (IP3) responses, suggesting that pheromone signalling is terminated by phosphorylation of specific proteins. Challenging antennal preparations fromHeliothis virescens with species-specific pheromones in the presence of [32P]-γ-ATP led to a rapid, stimulus-dependent incorporation of32Pi into antennal proteins. Pheromone-induced phosphorylation was completely abolished by a blockade of protein kinase C. Electrophoretic analysis revealed that upon stimulation with a pheromone blend two polypeptide bands were labelled; stimulation solely with the major compound (Z-11-hexadecenal) resulted in only a single labelled band. The data indicate that pheromones cause phosphorylation of specific antennal proteins which may be receptors for pheromones.
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    Protein kinase C in turtle brain: changes in enzyme activity during anoxia (1993)
    Springer
    Journal of comparative physiology 163 (1993), S. 84-88 
    Details
    ISSN: 1432-136X
    Keywords: Anoxia ; Protein kinase C ; Phosphorylation ; Brain ; Turtle, Pseudemys elegans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Protein kinase C from the anoxia-tolerant turtle Pseudemys scripta elegans was investigated to determine its role in mediating changes in brain metabolism associated with anoxia. Measurements of protein kinase C distribution in cytosol and membrane-associated fractions of cerebrum and hindbrain were performed with warm (18 °C)- and cold (7 °C)-acclimated animals exposed to normoxic or anoxic conditions. In cerebrum, the percentage of bound protein kinase C decreased from 48.5% to 35.1% in warm-acclimated animals and from 45.0% to 25.6% in cold-acclimated animals. In the hind-brain, bound protein kinase C increased from 45.0% to 72.9% in warm-acclimated animals and from 40.3% to 68.8% in cold-acclimated animals. The presence of three distinct protein kinase C isozymes (Types I, II and III) was confirmed by hydroxylapatite chromatography. The distribution of isozymes between cytosolic and membrane-associated fractions in cerebrum was 24% I, 37% II and 39% III (cytosolic) and 32% I, 35% II and 34% III (membrane-associated). In the hindbrain, the protein kinase C isozyme distribution was 34% I, 40% II and 26% III (cytosolic) and 18% I, 47% II and 35% III (membrane-associated). Kinetic characterization of the three isozymes showed that Type I was 27% activated by Ca2+, whereas Types II and III were only 4% and 2% activated by Ca2+, respectively. Full activity for all enzymes was observed only in the presence of phosphatidylserine and diacylglycerol. No differences in the K m for ATP, the K a for Ca2+ or the K a for phosphatidylserine were observed.
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    Dual role of calmodulin in excitable cells (1993)
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    Annals of biomedical engineering 21 (1993), S. 669-677 
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    ISSN: 1573-9686
    Keywords: Channel ; Phosphorylation ; Calmodulin ; Membrane ; Electrostatics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Consideration of the enzymatic reactions governing calcium channel phosphorylation and dephosphorylation leads one to deduce that there exist separate groups of enzymes, membrane-bound and cytoplasmic, that are activated by a common mediator, calmodulin (CaM), whose time-dependent appearance (via diffusion) at both locales is controlled by both intracellular calcium levels and electrostatic interaction with the membrane. In brief, the change in the sign and extent of the electrical charge borne by the modulator in the presence of calcium (Ca) brings about the electrostatic attraction that enables the transport of [Ca−CaM] to the membrane. This translocation of Ca−CaM makes possible a sequential activation of cellular enzymes whose locations differ. The sequence, both spatial and temporal, of the activation of various cellular enzymes by Ca−CaM appears to be a control network shared in common by excitable cells containing a stimulus-response pathway mediated by second messengers.
    Type of Medium: Electronic Resource
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    Meet the mosquitoes (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-10-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, Martin -- New York, N.Y. -- Science. 2002 Oct 4;298(5591):95.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12364781" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/physiology ; Animals ; Anopheles/physiology ; Culex/physiology ; *Culicidae/physiology ; Environment ; Feeding Behavior ; Female ; *Insect Vectors/physiology ; Male ; Oviposition ; Reproduction ; Sexual Behavior, Animal
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Gene expression during the life cycle of Drosophila melanogaster (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-09-28
    Description: Molecular genetic studies of Drosophila melanogaster have led to profound advances in understanding the regulation of development. Here we report gene expression patterns for nearly one-third of all Drosophila genes during a complete time course of development. Mutations that eliminate eye or germline tissue were used to further analyze tissue-specific gene expression programs. These studies define major characteristics of the transcriptional programs that underlie the life cycle, compare development in males and females, and show that large-scale gene expression data collected from whole animals can be used to identify genes expressed in particular tissues and organs or genes involved in specific biological and biochemical processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arbeitman, Michelle N -- Furlong, Eileen E M -- Imam, Farhad -- Johnson, Eric -- Null, Brian H -- Baker, Bruce S -- Krasnow, Mark A -- Scott, Matthew P -- Davis, Ronald W -- White, Kevin P -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2002 Sep 27;297(5590):2270-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12351791" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Animals ; Cluster Analysis ; Drosophila Proteins/genetics/physiology ; Drosophila melanogaster/embryology/*genetics/*growth & development ; Embryo, Nonmammalian/physiology ; Female ; *Gene Expression ; Gene Expression Profiling ; Gene Expression Regulation, Developmental ; *Genes, Insect ; Germ Cells/physiology ; Larva/genetics ; Life Cycle Stages/*genetics ; Male ; Oligonucleotide Array Sequence Analysis ; Organ Specificity ; Pupa/genetics ; RNA, Messenger/genetics/metabolism ; Sex Characteristics ; Transcription, Genetic
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Genomic instability in mice lacking histone H2AX (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-06
    Description: Higher order chromatin structure presents a barrier to the recognition and repair of DNA damage. Double-strand breaks (DSBs) induce histone H2AX phosphorylation, which is associated with the recruitment of repair factors to damaged DNA. To help clarify the physiological role of H2AX, we targeted H2AX in mice. Although H2AX is not essential for irradiation-induced cell-cycle checkpoints, H2AX-/- mice were radiation sensitive, growth retarded, and immune deficient, and mutant males were infertile. These pleiotropic phenotypes were associated with chromosomal instability, repair defects, and impaired recruitment of Nbs1, 53bp1, and Brca1, but not Rad51, to irradiation-induced foci. Thus, H2AX is critical for facilitating the assembly of specific DNA-repair complexes on damaged DNA.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4721576/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4721576/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Celeste, Arkady -- Petersen, Simone -- Romanienko, Peter J -- Fernandez-Capetillo, Oscar -- Chen, Hua Tang -- Sedelnikova, Olga A -- Reina-San-Martin, Bernardo -- Coppola, Vincenzo -- Meffre, Eric -- Difilippantonio, Michael J -- Redon, Christophe -- Pilch, Duane R -- Olaru, Alexandru -- Eckhaus, Michael -- Camerini-Otero, R Daniel -- Tessarollo, Lino -- Livak, Ferenc -- Manova, Katia -- Bonner, William M -- Nussenzweig, Michel C -- Nussenzweig, Andre -- Z99 CA999999/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2002 May 3;296(5569):922-7. Epub 2002 Apr 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Experimental Immunology Branch, National Cancer Institute, NIH, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11934988" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; B-Lymphocytes/immunology/physiology ; Base Sequence ; Cell Aging ; Cell Cycle ; Cells, Cultured ; *Chromosome Aberrations ; DNA Damage ; *DNA Repair ; Female ; Gene Targeting ; Histones/chemistry/*genetics/*physiology ; Immunoglobulin Class Switching ; Infertility, Male/genetics/physiopathology ; Lymphocyte Count ; Male ; Meiosis ; Mice ; Mice, Knockout ; Molecular Sequence Data ; Mutation ; Phosphorylation ; *Recombination, Genetic ; Spermatocytes/physiology ; T-Lymphocytes/immunology/physiology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Chemical synthesis of poliovirus cDNA: generation of infectious virus in the absence of natural template (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-07-13
    Description: Full-length poliovirus complementary DNA (cDNA) was synthesized by assembling oligonucleotides of plus and minus strand polarity. The synthetic poliovirus cDNA was transcribed by RNA polymerase into viral RNA, which translated and replicated in a cell-free extract, resulting in the de novo synthesis of infectious poliovirus. Experiments in tissue culture using neutralizing antibodies and CD155 receptor-specific antibodies and neurovirulence tests in CD155 transgenic mice confirmed that the synthetic virus had biochemical and pathogenic characteristics of poliovirus. Our results show that it is possible to synthesize an infectious agent by in vitro chemical-biochemical means solely by following instructions from a written sequence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cello, Jeronimo -- Paul, Aniko V -- Wimmer, Eckard -- New York, N.Y. -- Science. 2002 Aug 9;297(5583):1016-8. Epub 2002 Jul 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Genetics and Microbiology, School of Medicine, State University of New York at Stony Brook, Stony Brook, NY 11794-5222, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12114528" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/immunology ; Capsid/metabolism ; Cell-Free System ; DNA, Complementary/*chemical synthesis/genetics ; DNA-Directed RNA Polymerases/genetics ; Female ; *Genome, Viral ; HeLa Cells ; Humans ; Male ; *Membrane Proteins ; Mice ; Mice, Transgenic ; Neutralization Tests ; Poliomyelitis/virology ; *Poliovirus/genetics/immunology/pathogenicity/physiology ; Promoter Regions, Genetic ; Protein Biosynthesis ; RNA, Viral/*chemical synthesis/genetics/physiology ; Receptors, Virus/genetics/immunology/metabolism ; Transcription, Genetic ; Viral Plaque Assay ; Viral Proteins ; Virulence ; Virus Replication
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Primate origins meeting. New fossils and a glimpse of evolution (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-01-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moffat, Anne Simon -- New York, N.Y. -- Science. 2002 Jan 25;295(5555):613-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11809953" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; *Color Perception ; Feeding Behavior ; Female ; *Fossils ; Haplorhini ; Male ; Plant Leaves ; *Primates/anatomy & histology ; Skeleton
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Enhanced and delayed stress-induced alcohol drinking in mice lacking functional CRH1 receptors (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-05-04
    Description: There is a relation between stress and alcohol drinking. We show that the corticotropin-releasing hormone (CRH) system that mediates endocrine and behavioral responses to stress plays a role in the control of long-term alcohol drinking. In mice lacking a functional CRH1 receptor, stress leads to enhanced and progressively increasing alcohol intake. The effect of repeated stress on alcohol drinking behavior appeared with a delay and persisted throughout life. It was associated with an up-regulation of the N-methyl-d-aspartate receptor subunit NR2B. Alterations in the CRH1 receptor gene and adaptional changes in NR2B subunits may constitute a genetic risk factor for stress-induced alcohol drinking and alcoholism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sillaber, Inge -- Rammes, Gerhard -- Zimmermann, Stephan -- Mahal, Beatrice -- Zieglgansberger, Walter -- Wurst, Wolfgang -- Holsboer, Florian -- Spanagel, Rainer -- New York, N.Y. -- Science. 2002 May 3;296(5569):931-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute of Psychiatry, Kraepelinstrasse 2-10, 80804 Munich, Germany. sillaber@mpipsykl.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11988580" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; *Alcohol Drinking ; Alcoholism/*etiology/genetics ; Animals ; Brain/metabolism ; Corticotropin-Releasing Hormone/physiology ; Ethanol/blood ; Female ; Hippocampus/physiology ; In Vitro Techniques ; Male ; Mice ; Mice, Knockout ; Models, Animal ; Mutation ; Receptors, AMPA/metabolism ; Receptors, Corticotropin-Releasing Hormone/*genetics/*physiology ; Receptors, Kainic Acid/metabolism ; Receptors, N-Methyl-D-Aspartate/*metabolism ; Signal Transduction ; Stress, Physiological/physiopathology ; Stress, Psychological/*physiopathology ; Up-Regulation
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Construction and analysis of a human-chimpanzee comparative clone map (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-01-05
    Description: The recently released human genome sequences provide us with reference data to conduct comparative genomic research on primates, which will be important to understand what genetic information makes us human. Here we present a first-generation human-chimpanzee comparative genome map and its initial analysis. The map was constructed through paired alignment of 77,461 chimpanzee bacterial artificial chromosome end sequences with publicly available human genome sequences. We detected candidate positions, including two clusters on human chromosome 21 that suggest large, nonrandom regions of difference between the two genomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fujiyama, Asao -- Watanabe, Hidemi -- Toyoda, Atsushi -- Taylor, Todd D -- Itoh, Takehiko -- Tsai, Shih-Feng -- Park, Hong-Seog -- Yaspo, Marie-Laure -- Lehrach, Hans -- Chen, Zhu -- Fu, Gang -- Saitou, Naruya -- Osoegawa, Kazutoyo -- de Jong, Pieter J -- Suto, Yumiko -- Hattori, Masahira -- Sakaki, Yoshiyuki -- New York, N.Y. -- Science. 2002 Jan 4;295(5552):131-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉RIKEN Genomic Sciences Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan. afujiyam@gsc.riken.go.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11778049" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chromosomes, Artificial, Bacterial ; Chromosomes, Human, Pair 21/genetics ; Cloning, Molecular ; Contig Mapping ; Female ; Gene Library ; *Genome ; *Genome, Human ; Humans ; Male ; Pan troglodytes/*genetics ; *Physical Chromosome Mapping ; Sequence Alignment ; Sequence Analysis, DNA ; Sequence Tagged Sites ; X Chromosome/genetics ; Y Chromosome/genetics
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Disrupted timing of discontinuous but not continuous movements by cerebellar lesions (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-31
    Description: Patients with cerebellar damage are known to exhibit deficits in the temporal control of movements. We report that these deficits are restricted to discontinuous movements. Cerebellar patients exhibited no deficit in temporal variability when producing continuous, rhythmic movements. We hypothesize that the temporal properties of continuous movements are emergent and reflect the operation of other control parameters not associated with the cerebellum. In contrast, discontinuous movements require an explicit representation of the temporal goal, a function of the cerebellum. The requirement for explicit temporal representation provides a parsimonious account of cerebellar involvement in a range of tasks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spencer, Rebecca M C -- Zelaznik, Howard N -- Diedrichsen, Jorn -- Ivry, Richard B -- NS17778/NS/NINDS NIH HHS/ -- NS30256/NS/NINDS NIH HHS/ -- NS40813/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2003 May 30;300(5624):1437-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, University of California, Berkeley, 3210 Tolman Hall #1650, Berkeley, CA 94720, USA. rspencer@socrates.berkeley.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12775842" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Aged, 80 and over ; Cerebellar Diseases/*physiopathology ; Cerebellum/physiology/*physiopathology ; Female ; Humans ; Male ; Middle Aged ; *Motor Activity ; Movement ; *Psychomotor Performance ; Spinocerebellar Degenerations/*physiopathology ; Time Factors
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Infectious disease. Another disease blights families in Siberia's far north (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stone, Richard -- New York, N.Y. -- Science. 2002 Apr 26;296(5568):644.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11976425" target="_blank"〉PubMed〈/a〉
    Keywords: Female ; Humans ; Male ; Pedigree ; Siberia/epidemiology ; Spinocerebellar Ataxias/*epidemiology/*genetics ; *Trinucleotide Repeats
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Pheromone reception. When in doubt, mice mate rather than hate (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-02-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Beckman, Mary -- New York, N.Y. -- Science. 2002 Feb 1;295(5556):782.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11823614" target="_blank"〉PubMed〈/a〉
    Keywords: Aggression ; Animals ; *Behavior, Animal ; Cues ; Female ; Male ; Membrane Proteins/*genetics/*physiology ; Mice ; Mice, Knockout ; Neurons/physiology ; Pheromones/*physiology ; Sex Characteristics ; *Sexual Behavior, Animal ; TRPC Cation Channels ; Vomeronasal Organ/*innervation/physiology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Retrograde viral delivery of IGF-1 prolongs survival in a mouse ALS model (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-08-09
    Description: Amyotrophic lateral sclerosis (ALS) is a progressive, lethal neuromuscular disease that is associated with the degeneration of spinal and brainstem motor neurons, leading to atrophy of limb, axial, and respiratory muscles. The cause of ALS is unknown, and there is no effective therapy. Neurotrophic factors are candidates for therapeutic evaluation in ALS. Although chronic delivery of molecules to the central nervous system has proven difficult, we recently discovered that adeno-associated virus can be retrogradely transported efficiently from muscle to motor neurons of the spinal cord. We report that insulin-like growth factor 1 prolongs life and delays disease progression, even when delivered at the time of overt disease symptoms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaspar, Brian K -- Llado, Jeronia -- Sherkat, Nushin -- Rothstein, Jeffrey D -- Gage, Fred H -- AG12992/AG/NIA NIH HHS/ -- AG21876/AG/NIA NIH HHS/ -- NS33958/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2003 Aug 8;301(5634):839-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12907804" target="_blank"〉PubMed〈/a〉
    Keywords: Amyotrophic Lateral Sclerosis/pathology/physiopathology/*therapy ; Animals ; Apoptosis ; Base Sequence ; Caspase 9 ; Caspases/metabolism ; Cell Count ; Dependovirus/*genetics ; Disease Models, Animal ; Disease Progression ; Gene Transfer Techniques ; *Genetic Therapy ; *Genetic Vectors/administration & dosage ; Glial Cell Line-Derived Neurotrophic Factor ; Green Fluorescent Proteins ; Insulin-Like Growth Factor I/*genetics ; Luminescent Proteins/genetics ; Male ; Mice ; Mice, Transgenic ; Molecular Sequence Data ; Motor Neurons/pathology/virology ; Muscle, Skeletal/virology ; Nerve Growth Factors/genetics ; *Protein-Serine-Threonine Kinases ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-akt ; Random Allocation ; Spinal Cord/chemistry/pathology/virology ; Superoxide Dismutase/genetics/metabolism ; Ubiquitin/analysis
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    Evolutionary discrimination of mammalian conserved non-genic sequences (CNGs) (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-10-04
    Description: Analysis of the human and mouse genomes identified an abundance of conserved non-genic sequences (CNGs). The significance and evolutionary depth of their conservation remain unanswered. We have quantified levels and patterns of conservation of 191 CNGs of human chromosome 21 in 14 mammalian species. We found that CNGs are significantly more conserved than protein-coding genes and noncoding RNAS (ncRNAs) within the mammalian class from primates to monotremes to marsupials. The pattern of substitutions in CNGs differed from that seen in protein-coding and ncRNA genes and resembled that of protein-binding regions. About 0.3% to 1% of the human genome corresponds to a previously unknown class of extremely constrained CNGs shared among mammals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dermitzakis, Emmanouil T -- Reymond, Alexandre -- Scamuffa, Nathalie -- Ucla, Catherine -- Kirkness, Ewen -- Rossier, Colette -- Antonarakis, Stylianos E -- New York, N.Y. -- Science. 2003 Nov 7;302(5647):1033-5. Epub 2003 Oct 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Medical Genetics and National Center of Competence in Research (NCCR) Frontiers in Genetics, University of Geneva Medical School and University Hospitals, 1211 Geneva, Switzerland. Emmanouil.Dermitzakis@medecine.unige.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14526086" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chromosomes, Human, Pair 21/*genetics ; Chromosomes, Mammalian/*genetics ; *Conserved Sequence ; DNA, Intergenic/*genetics ; Discriminant Analysis ; *Evolution, Molecular ; Female ; Genetic Code ; Genome ; Humans ; Male ; Mammals/*genetics ; Molecular Sequence Data ; Polymerase Chain Reaction ; Proteins/genetics ; RNA, Untranslated/genetics ; Selection, Genetic ; Sequence Alignment ; Species Specificity ; Time ; Transcription, Genetic
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    Mutations in dynein link motor neuron degeneration to defects in retrograde transport (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-06
    Description: Degenerative disorders of motor neurons include a range of progressive fatal diseases such as amyotrophic lateral sclerosis (ALS), spinal-bulbar muscular atrophy (SBMA), and spinal muscular atrophy (SMA). Although the causative genetic alterations are known for some cases, the molecular basis of many SMA and SBMA-like syndromes and most ALS cases is unknown. Here we show that missense point mutations in the cytoplasmic dynein heavy chain result in progressive motor neuron degeneration in heterozygous mice, and in homozygotes this is accompanied by the formation of Lewy-like inclusion bodies, thus resembling key features of human pathology. These mutations exclusively perturb neuron-specific functions of dynein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hafezparast, Majid -- Klocke, Rainer -- Ruhrberg, Christiana -- Marquardt, Andreas -- Ahmad-Annuar, Azlina -- Bowen, Samantha -- Lalli, Giovanna -- Witherden, Abi S -- Hummerich, Holger -- Nicholson, Sharon -- Morgan, P Jeffrey -- Oozageer, Ravi -- Priestley, John V -- Averill, Sharon -- King, Von R -- Ball, Simon -- Peters, Jo -- Toda, Takashi -- Yamamoto, Ayumu -- Hiraoka, Yasushi -- Augustin, Martin -- Korthaus, Dirk -- Wattler, Sigrid -- Wabnitz, Philipp -- Dickneite, Carmen -- Lampel, Stefan -- Boehme, Florian -- Peraus, Gisela -- Popp, Andreas -- Rudelius, Martina -- Schlegel, Juergen -- Fuchs, Helmut -- Hrabe de Angelis, Martin -- Schiavo, Giampietro -- Shima, David T -- Russ, Andreas P -- Stumm, Gabriele -- Martin, Joanne E -- Fisher, Elizabeth M C -- New York, N.Y. -- Science. 2003 May 2;300(5620):808-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurodegenerative Disease, Institute of Neurology, National Hospital for Neurology and Neurosurgery, Queen Square, London WC1N 3BG, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12730604" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anterior Horn Cells/pathology ; Apoptosis ; *Axonal Transport ; Cell Differentiation ; Cell Movement ; Central Nervous System/embryology ; Chromosome Mapping ; Dimerization ; Dyneins/chemistry/*genetics/*physiology ; Female ; Ganglia, Spinal/pathology ; Golgi Apparatus/metabolism/ultrastructure ; Heterozygote ; Homozygote ; Lewy Bodies/pathology ; Male ; Mice ; Mice, Inbred C3H ; Mice, Inbred C57BL ; Motor Neuron Disease/*genetics/pathology/physiopathology ; Motor Neurons/*physiology/ultrastructure ; Mutation ; Mutation, Missense ; *Nerve Degeneration ; Peptide Fragments/metabolism ; Phenotype ; Point Mutation ; Spinal Nerves/growth & development ; Tetanus Toxin/metabolism
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    Electronic ISSN: 1095-9203
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    Infectious disease. Siberia's deadly stalker emerges from the shadows (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stone, Richard -- New York, N.Y. -- Science. 2002 Apr 26;296(5568):642-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11976423" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Antibodies, Viral/analysis ; Cerebral Cortex/pathology ; Cerebrospinal Fluid/virology ; Disease Outbreaks ; Encephalitis, Herpes Simplex/epidemiology ; Encephalomyelitis/ethnology/*etiology/pathology/virology ; Female ; Genetic Predisposition to Disease ; Herpesviridae/immunology/isolation & purification ; Herpesviridae Infections/ethnology/pathology/virology ; Humans ; Male ; Population Surveillance ; Rural Health ; Siberia/epidemiology ; Virus Diseases/ethnology/pathology/virology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Adult-onset primary open-angle glaucoma caused by mutations in optineurin (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-02-09
    Description: Primary open-angle glaucoma (POAG) affects 33 million individuals worldwide and is a leading cause of blindness. In a study of 54 families with autosomal dominantly inherited adult-onset POAG, we identified the causative gene on chromosome 10p14 and designated it OPTN (for "optineurin"). Sequence alterations in OPTN were found in 16.7% of families with hereditary POAG, including individuals with normal intraocular pressure. The OPTN gene codes for a conserved 66-kilodalton protein of unknown function that has been implicated in the tumor necrosis factor-alpha signaling pathway and that interacts with diverse proteins including Huntingtin, Ras-associated protein RAB8, and transcription factor IIIA. Optineurin is expressed in trabecular meshwork, nonpigmented ciliary epithelium, retina, and brain, and we speculate that it plays a neuroprotective role.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rezaie, Tayebeh -- Child, Anne -- Hitchings, Roger -- Brice, Glen -- Miller, Lauri -- Coca-Prados, Miguel -- Heon, Elise -- Krupin, Theodore -- Ritch, Robert -- Kreutzer, Donald -- Crick, R Pitts -- Sarfarazi, Mansoor -- EY-09947/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2002 Feb 8;295(5557):1077-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Ophthalmic Genetics Laboratory, Surgical Research Center, Department of Surgery, University of Connecticut Health Center, Farmington, CT 06030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11834836" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Alternative Splicing ; Amino Acid Sequence ; Brain/metabolism ; Chromosome Mapping ; Chromosomes, Human, Pair 10/genetics ; Ciliary Body/metabolism ; Exons ; Eye Proteins/analysis/chemistry/*genetics/physiology ; Female ; Glaucoma, Open-Angle/*genetics ; Golgi Apparatus/chemistry ; Heterozygote ; Humans ; Intraocular Pressure ; Male ; Middle Aged ; *Mutation ; *Mutation, Missense ; Nerve Tissue Proteins/analysis/chemistry/*genetics/physiology ; Ocular Hypertension/genetics ; Pedigree ; Polymorphism, Single-Stranded Conformational ; Retina/metabolism ; Trabecular Meshwork/metabolism ; *Transcription Factor TFIIIA ; Zinc Fingers
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    Inhibition of excess nodal signaling during mouse gastrulation by the transcriptional corepressor DRAP1 (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-12-10
    Description: The formation and patterning of mesoderm during mammalian gastrulation require the activity of Nodal, a secreted mesoderm-inducing factor of the transforming growth factor-beta (TGF-beta) family. Here we show that the transcriptional corepressor DRAP1 has a very specific role in regulation of Nodal activity during mouse embryogenesis. We find that loss of Drap1 leads to severe gastrulation defects that are consistent with increased expression of Nodal and can be partially suppressed by Nodal heterozygosity. Biochemical studies indicate that DRAP1 interacts with and inhibits DNA binding by the winged-helix transcription factor FoxH1 (FAST), a critical component of a positive feedback loop for Nodal activity. We propose that DRAP1 limits the spread of a morphogenetic signal by down-modulating the response to the Nodal autoregulatory loop.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Iratni, Rabah -- Yan, Yu-Ting -- Chen, Canhe -- Ding, Jixiang -- Zhang, Yi -- Price, Sandy M -- Reinberg, Danny -- Shen, Michael M -- New York, N.Y. -- Science. 2002 Dec 6;298(5600):1996-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Biochemistry, Division of Nucleic Acids Enzymology, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12471260" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Cell Line ; Crosses, Genetic ; DNA/metabolism ; DNA-Binding Proteins/metabolism ; *Embryonic and Fetal Development ; Female ; Forkhead Transcription Factors ; Gastrula/*physiology ; Gene Expression Regulation, Developmental ; Gene Targeting ; Heterozygote ; In Situ Hybridization ; Left-Right Determination Factors ; Male ; Mesoderm/cytology/physiology ; Mice ; Morphogenesis ; Mutation ; Nodal Protein ; Phenotype ; Protein Binding ; RNA Interference ; Recombinant Fusion Proteins/metabolism ; Repressor Proteins/genetics/*metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; *Signal Transduction ; Transcription Factors/metabolism ; Transforming Growth Factor beta/genetics/*metabolism
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    Parkinson's disease. Coincidence or connection? (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stone, Richard -- New York, N.Y. -- Science. 2002 Apr 19;296(5567):451-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11964452" target="_blank"〉PubMed〈/a〉
    Keywords: Canada/epidemiology ; Cluster Analysis ; Environmental Exposure/adverse effects ; *Famous Persons ; Female ; History, 21st Century ; Humans ; Male ; Parkinson Disease/*epidemiology/etiology ; *Television ; Time Factors ; Virus Diseases/complications/epidemiology
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    Amphibian decline. Ubiquitous herbicide emasculates frogs (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Withgott, Jay -- New York, N.Y. -- Science. 2002 Apr 19;296(5567):447-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11964448" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atrazine/administration & dosage/*toxicity ; Disorders of Sex Development/*chemically induced/pathology ; Female ; Gonads/*abnormalities ; Herbicides/administration & dosage/*toxicity ; Male ; Ovary/abnormalities ; Rana pipiens/*abnormalities/anatomy & histology/physiology ; Testis/abnormalities ; Testosterone/metabolism ; Water Pollutants, Chemical/administration & dosage/toxicity ; Xenopus laevis/*abnormalities/anatomy & histology/physiology
    Print ISSN: 0036-8075
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    Lateralized cognitive processes and lateralized task control in the human brain (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-19
    Description: The principles underlying human hemispheric specialization are poorly understood. We used functional magnetic resonance imaging of letter and visuospatial decision tasks with identical word stimuli to address two unresolved problems. First, hemispheric specialization depended on the nature of the task rather than on the nature of the stimulus. Second, analysis of frontal candidate regions for cognitive control showed increased coupling between left anterior cingulate cortex (ACC) and left inferior frontal gyrus during letter decisions, whereas right ACC showed enhanced coupling with right parietal areas during visuospatial decisions. Cognitive control is thus localized in the same hemisphere as task execution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stephan, Klaas E -- Marshall, John C -- Friston, Karl J -- Rowe, James B -- Ritzl, Afra -- Zilles, Karl -- Fink, Gereon R -- 077029/Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2003 Jul 18;301(5631):384-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Medicine (IME), Research Centre Julich, 52425 Julich, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12869765" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Brain/*physiology ; Brain Mapping ; *Cognition ; Functional Laterality ; Gyrus Cinguli/physiology ; Humans ; *Language ; Magnetic Resonance Imaging ; Male ; Parietal Lobe/physiology ; Prefrontal Cortex/physiology ; Space Perception ; Visual Perception
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    Lupus: mysterious disease holds its secrets tight (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, Eliot -- New York, N.Y. -- Science. 2002 Apr 26;296(5568):689-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11976440" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Antinuclear/immunology/metabolism ; Autoantibodies/immunology ; Autoantigens/immunology ; Chromosome Mapping ; Clinical Trials as Topic ; Disease Susceptibility ; Epstein-Barr Virus Infections/complications ; Female ; Genetic Predisposition to Disease ; Humans ; Immune System/physiopathology ; Immunotherapy ; Lupus Erythematosus, Systemic/*etiology/genetics/immunology/therapy ; Male ; Mental Processes ; *Ribonucleoproteins, Small Nuclear ; Risk Factors ; snRNP Core Proteins
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    Coordinated reactivation of distributed memory traces in primate neocortex (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-09-21
    Description: Conversion of new memories into a lasting form may involve the gradual refinement and linking together of neural representations stored widely throughout neocortex. This consolidation process may require coordinated reactivation of distributed components of memory traces while the cortex is "offline," i.e., not engaged in processing external stimuli. Simultaneous neural ensemble recordings from four sites in the macaque neocortex revealed such coordinated reactivation. In motor, somatosensory, and parietal cortex (but not prefrontal cortex), the behaviorally induced correlation structure and temporal patterning of neural ensembles within and between regions were preserved, confirming a major tenet of the trace-reactivation theory of memory consolidation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoffman, K L -- McNaughton, B L -- MH01565/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2002 Sep 20;297(5589):2070-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neural Systems, Memory, and Aging, University of Arizona, Tucson, AZ 85724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12242447" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Brain Mapping ; Cues ; Electrodes, Implanted ; Macaca mulatta ; Male ; Memory/*physiology ; Mental Recall/*physiology ; Motor Cortex/physiology ; Neocortex/*physiology ; Neurons/*physiology ; Parietal Lobe/physiology ; Prefrontal Cortex/physiology ; Somatosensory Cortex/physiology ; Time Factors
    Print ISSN: 0036-8075
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    Altered patterns of sleep and behavioral adaptability in NPAS2-deficient mice (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-05
    Description: Animal behavior is synchronized to the 24-hour light:dark (LD) cycle by regulatory programs that produce circadian fluctuations in gene expression throughout the body. In mammals, the transcription factor CLOCK controls circadian oscillation in the suprachiasmatic nucleus of the brain; its paralog, neuronal PAS domain protein 2 (NPAS2), performs a similar function in other forebrain sites. To investigate the role of NPAS2 in behavioral manifestations of circadian rhythm, we studied locomotor activity, sleep patterns, and adaptability to both light- and restricted food-driven entrainment in NPAS2-deficient mice. Our results indicate that NPAS2 plays a substantive role in maintaining circadian behaviors in normal LD and feeding conditions and that NPAS2 is critical for adaptability to food restriction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dudley, Carol A -- Erbel-Sieler, Claudia -- Estill, Sandi Jo -- Reick, Martin -- Franken, Paul -- Pitts, SiNae -- McKnight, Steven L -- 37919/PHS HHS/ -- 4R37 MH59388/MH/NIMH NIH HHS/ -- 5T3DK07328/DK/NIDDK NIH HHS/ -- HL 64148/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2003 Jul 18;301(5631):379-83. Epub 2003 Jul 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9152, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12843397" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptation, Physiological ; Animals ; Basic Helix-Loop-Helix Transcription Factors ; Behavior, Animal ; Biological Clocks/*physiology ; Body Weight ; CLOCK Proteins ; Circadian Rhythm/*physiology ; Crosses, Genetic ; Darkness ; Eating ; Electroencephalography ; Electromyography ; Female ; Food ; Gene Targeting ; Light ; Male ; Mice ; Mice, Inbred C57BL ; *Motor Activity ; Nerve Tissue Proteins/genetics/*physiology ; Prosencephalon/physiology ; *Sleep ; Suprachiasmatic Nucleus/physiology ; Trans-Activators/genetics/physiology ; Transcription Factors/genetics/*physiology
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    Ecology. New count of old whales adds up to big debate (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lubick, Naomi -- New York, N.Y. -- Science. 2003 Jul 25;301(5632):451.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12881542" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atlantic Ocean ; Conservation of Natural Resources ; DNA, Mitochondrial/genetics ; *Ecosystem ; Female ; Genetic Variation ; Genetics, Population ; Male ; Mutation ; Population Density ; Population Dynamics ; Time Factors ; *Whales/genetics
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    Whales before whaling in the North Atlantic (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-26
    Description: It is well known that hunting dramatically reduced all baleen whale populations, yet reliable estimates of former whale abundances are elusive. Based on coalescent models for mitochondrial DNA sequence variation, the genetic diversity of North Atlantic whales suggests population sizes of approximately 240,000 humpback, 360,000 fin, and 265,000 minke whales. Estimates for fin and humpback whales are far greater than those previously calculated for prewhaling populations and 6 to 20 times higher than present-day population estimates. Such discrepancies suggest the need for a quantitative reevaluation of historical whale populations and a fundamental revision in our conception of the natural state of the oceans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roman, Joe -- Palumbi, Stephen R -- New York, N.Y. -- Science. 2003 Jul 25;301(5632):508-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Organismic and Evolutionary Biology, Harvard University, 16 Divinity Avenue, Cambridge, MA 02138, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12881568" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atlantic Ocean ; Base Sequence ; Conservation of Natural Resources ; DNA, Mitochondrial/genetics ; *Ecosystem ; Female ; Genetic Variation ; Genetics, Population ; Male ; Molecular Sequence Data ; Population Density ; Population Dynamics ; Time Factors ; *Whales/classification/genetics
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    A heterozygote advantage (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-10-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hedrick, Philip W -- New York, N.Y. -- Science. 2003 Oct 3;302(5642):57.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14526061" target="_blank"〉PubMed〈/a〉
    Keywords: Ethnic Groups/*genetics ; Female ; Genetic Variation ; Genotype ; Haplotypes ; *Heterozygote ; Humans ; Kuru/*genetics ; Male ; Middle Aged ; Papua New Guinea ; PrPC Proteins/*genetics ; *Selection, Genetic
    Print ISSN: 0036-8075
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    Infectious disease. An avian flu jumps to people (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-03-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wuethrich, Bernice -- New York, N.Y. -- Science. 2003 Mar 7;299(5612):1504.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12624244" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Birds/virology ; Chickens/virology ; Child ; China/epidemiology ; Hong Kong/epidemiology ; Humans ; Influenza A virus/genetics/immunology/*pathogenicity ; Influenza Vaccines ; Influenza in Birds/epidemiology/*virology ; Influenza, Human/*virology ; Male ; Virulence ; World Health Organization
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    Biomedicine. Ataxin-1 regulators in the spotlight (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heintz, Nathaniel -- New York, N.Y. -- Science. 2003 Jul 4;301(5629):59-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Rockefeller University, New York, NY 10021, USA. heintz@rockefeller.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12843383" target="_blank"〉PubMed〈/a〉
    Keywords: 14-3-3 Proteins ; Amino Acid Substitution ; Animals ; Ataxin-1 ; Ataxins ; Cell Nucleus/metabolism ; Disease Progression ; Mice ; Mice, Transgenic ; Mutation ; Nerve Tissue Proteins/*chemistry/genetics/*metabolism ; Nuclear Proteins/*chemistry/genetics/*metabolism ; Peptides ; Phosphorylation ; *Protein-Serine-Threonine Kinases ; Proto-Oncogene Proteins/*metabolism ; Proto-Oncogene Proteins c-akt ; Purkinje Cells/metabolism/ultrastructure ; Signal Transduction ; Spinocerebellar Ataxias/etiology/genetics/pathology/*physiopathology ; *Trinucleotide Repeat Expansion ; Tyrosine 3-Monooxygenase/*metabolism
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    Demography of dietary restriction and death in Drosophila (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-09-23
    Description: Dietary restriction (DR) increases life-span in organisms from yeast to mammals, presumably by slowing the accumulation of aging-related damage. Here we show that in Drosophila, DR extends life-span entirely by reducing the short-term risk of death. Two days after the application of DR at any age for the first time, previously fully fed flies are no more likely to die than flies of the same age that have been subjected to long-term DR. DR of mammals may also reduce short-term risk of death, and hence DR instigated at any age could generate a full reversal of mortality.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mair, William -- Goymer, Patrick -- Pletcher, Scott D -- Partridge, Linda -- New York, N.Y. -- Science. 2003 Sep 19;301(5640):1731-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University College London, Darwin Building, Gower Street, London WC1E 6BT, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14500985" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; *Caloric Restriction ; Demography ; *Diet ; Drosophila/*physiology ; Female ; *Longevity ; Male ; Mortality ; Reproduction ; Risk ; Temperature ; Time Factors
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    Cell biology. Microtubule asymmetry (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-06-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gundersen, Gregg G -- Bretscher, Anthony -- New York, N.Y. -- Science. 2003 Jun 27;300(5628):2040-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy and Cell Biology and Department of Pathology, Columbia University, New York, NY 10032, USA. ggg1@columbia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12829769" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; CDC28 Protein Kinase, S cerevisiae/*metabolism ; Cell Cycle Proteins/metabolism ; Cell Division ; Cell Polarity ; Cyclins/metabolism ; Microtubule Proteins/metabolism ; Microtubule-Organizing Center/*metabolism/ultrastructure ; Microtubules/*metabolism/ultrastructure ; Models, Biological ; Mutation ; Myosin Heavy Chains/metabolism ; Myosin Type V/metabolism ; Nuclear Proteins/*metabolism ; Phosphorylation ; Protein Transport ; Saccharomyces cerevisiae/cytology/metabolism/ultrastructure ; Saccharomyces cerevisiae Proteins/metabolism ; Spindle Apparatus/*physiology/ultrastructure
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Requirement of hippocampal neurogenesis for the behavioral effects of antidepressants (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-08-09
    Description: Various chronic antidepressant treatments increase adult hippocampal neurogenesis, but the functional importance of this phenomenon remains unclear. Here, using genetic and radiological methods, we show that disrupting antidepressant-induced neurogenesis blocks behavioral responses to antidepressants. Serotonin 1A receptor null mice were insensitive to the neurogenic and behavioral effects of fluoxetine, a serotonin selective reuptake inhibitor. X-irradiation of a restricted region of mouse brain containing the hippocampus prevented the neurogenic and behavioral effects of two classes of antidepressants. These findings suggest that the behavioral effects of chronic antidepressants may be mediated by the stimulation of neurogenesis in the hippocampus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Santarelli, Luca -- Saxe, Michael -- Gross, Cornelius -- Surget, Alexandre -- Battaglia, Fortunato -- Dulawa, Stephanie -- Weisstaub, Noelia -- Lee, James -- Duman, Ronald -- Arancio, Ottavio -- Belzung, Catherine -- Hen, Rene -- New York, N.Y. -- Science. 2003 Aug 8;301(5634):805-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neurobiology and Behavior, Columbia University, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12907793" target="_blank"〉PubMed〈/a〉
    Keywords: 8-Hydroxy-2-(di-n-propylamino)tetralin/pharmacology ; Animals ; Antidepressive Agents/*pharmacology ; Antidepressive Agents, Second-Generation/pharmacology ; Antidepressive Agents, Tricyclic/pharmacology ; Behavior, Animal/*drug effects ; Cell Division/drug effects/radiation effects ; Conditioning (Psychology) ; Dentate Gyrus/cytology/drug effects/physiology ; Fear ; Feeding Behavior/drug effects ; Fluoxetine/*pharmacology ; Grooming/drug effects ; Hippocampus/cytology/drug effects/*physiology/radiation effects ; Long-Term Potentiation/radiation effects ; Male ; Mice ; Mice, Knockout ; Neurons/drug effects/*physiology ; Receptors, Serotonin/genetics/metabolism ; Receptors, Serotonin, 5-HT1 ; Stress, Physiological/drug therapy/physiopathology ; Synaptic Transmission/radiation effects
    Print ISSN: 0036-8075
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  • 88
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    Role of Raf in vascular protection from distinct apoptotic stimuli (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-05
    Description: Raf kinases have been linked to endothelial cell survival. Here, we show that basic fibroblast growth factor (bFGF) and vascular endothelial growth factor (VEGF) differentially activate Raf, resulting in protection from distinct pathways of apoptosis in human endothelial cells and chick embryo vasculature. bFGF activated Raf-1 via p21-activated protein kinase-1 (PAK-1) phosphorylation of serines 338 and 339, resulting in Raf-1 mitochondrial translocation and endothelial cell protection from the intrinsic pathway of apoptosis, independent of the mitogen-activated protein kinase kinase-1 (MEK1). In contrast, VEGF activated Raf-1 via Src kinase, leading to phosphorylation of tyrosines 340 and 341 and MEK1-dependent protection from extrinsic-mediated apoptosis. These findings implicate Raf-1 as a pivotal regulator of endothelial cell survival during angiogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alavi, Alireza -- Hood, John D -- Frausto, Ricardo -- Stupack, Dwayne G -- Cheresh, David A -- CA45726/CA/NCI NIH HHS/ -- CA50286/CA/NCI NIH HHS/ -- CA75924/CA/NCI NIH HHS/ -- P01 CA78045/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2003 Jul 4;301(5629):94-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12843393" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Cell Survival ; Cells, Cultured ; Chick Embryo ; Endothelial Growth Factors/pharmacology ; Endothelium, Vascular/*cytology/drug effects ; Enzyme Activation ; Enzyme Inhibitors/pharmacology ; Fibroblast Growth Factor 2/pharmacology ; Flavonoids/pharmacology ; Humans ; Intercellular Signaling Peptides and Proteins/pharmacology ; Lymphokines/pharmacology ; MAP Kinase Kinase 1 ; Mitochondria/metabolism ; Mitogen-Activated Protein Kinase 1/metabolism ; Mitogen-Activated Protein Kinase 3 ; Mitogen-Activated Protein Kinase Kinases/antagonists & inhibitors/metabolism ; Mitogen-Activated Protein Kinases/metabolism ; Neovascularization, Pathologic ; *Neovascularization, Physiologic/drug effects ; Phosphorylation ; Point Mutation ; Protein Transport ; Protein-Serine-Threonine Kinases/antagonists & inhibitors/metabolism ; Proto-Oncogene Proteins B-raf ; Proto-Oncogene Proteins c-raf/chemistry/genetics/*metabolism ; Signal Transduction ; Umbilical Veins ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors ; p21-Activated Kinases ; src-Family Kinases/antagonists & inhibitors/metabolism
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 89
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    Low potential for climatic stress adaptation in a rainforest Drosophila species (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-05
    Description: The ability of sensitive rainforest species to evolve in response to climate change is largely unknown. We show that the Australian tropical rainforest fly Drosophila birchii exhibits clinal variation in desiccation resistance, but the most resistant population lacks the ability to evolve further resistance even after intense selection for over 30 generations. Parent-offspring comparisons indicate low heritable variation for this trait but high levels of genetic variation for morphology. D. birchii also exhibits abundant genetic variation at microsatellite loci. The low potential for resistance evolution highlights the importance of assessing evolutionary potential in targeted ecological traits and species from threatened habitats.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoffmann, A A -- Hallas, R J -- Dean, J A -- Schiffer, M -- New York, N.Y. -- Science. 2003 Jul 4;301(5629):100-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Environmental Stress and Adaptation Research, La Trobe University, Bundoora, Victoria 3086, Australia. A.Hoffmann@latrobe.edu.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12843394" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptation, Physiological ; Animals ; Australia ; *Biological Evolution ; *Climate ; Crosses, Genetic ; Dehydration ; Drosophila/*genetics/*physiology ; Ecosystem ; Environment ; Female ; *Genetic Variation ; Geography ; Inbreeding ; Male ; Microsatellite Repeats ; Selection, Genetic ; Trees
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    Optical imaging of a tactile illusion in area 3b of the primary somatosensory cortex (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-09-23
    Description: In the tactile funneling illusion, the simultaneous presentation of brief stimuli at multiple points on the skin produces a single focal sensation at the center of the stimulus pattern even when no physical stimulus occurs at that site. Consistent with the funneling percept, we show with optical imaging in area 3b of the primary somatosensory cortex (SI) that simultaneous stimulation of two fingertips produces a single focal cortical activation between the single fingertip activation regions. Thus, in contrast to traditional views of the body map, topographic representation in the SI reflects the perceived rather than the physical location of peripheral stimulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Li M -- Friedman, Robert M -- Roe, Anna W -- New York, N.Y. -- Science. 2003 Oct 31;302(5646):881-5. Epub 2003 Sep 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Yale University School of Medicine, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14500850" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Brain Mapping ; Diagnostic Imaging ; Electrophysiology ; Female ; Fingers ; Humans ; Illusions/*physiology ; Male ; Perception/*physiology ; Physical Stimulation ; Saimiri ; Somatosensory Cortex/*physiology ; Touch/*physiology
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    SARS. Researcher told to stay home after China trip (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, Martin -- New York, N.Y. -- Science. 2003 May 23;300(5623):1216.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12764163" target="_blank"〉PubMed〈/a〉
    Keywords: China ; Humans ; Male ; Middle Aged ; New York City ; *Quarantine ; *Research Personnel ; Severe Acute Respiratory Syndrome/*prevention & control ; *Travel
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  • 92
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    Botany. State transitions--a question of balance (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-03-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Allen, John F -- New York, N.Y. -- Science. 2003 Mar 7;299(5612):1530-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Biochemistry, Center for Chemistry and Chemical Engineering, Box 124, Lund University, SE-221 00 Lund, Sweden. john.allen@plantbio.lu.se〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12624254" target="_blank"〉PubMed〈/a〉
    Keywords: Algal Proteins/chemistry/genetics/isolation & purification/metabolism ; Animals ; Binding Sites ; Chlamydomonas reinhardtii/*enzymology/genetics/metabolism ; Chlorophyll/metabolism ; Electron Transport ; Fluorescence ; Gene Library ; Light ; Light-Harvesting Protein Complexes ; Models, Biological ; Mutation ; Oxidation-Reduction ; Phosphorylation ; Photosynthesis ; Photosynthetic Reaction Center Complex Proteins/*metabolism ; Plastoquinone/metabolism ; Protein-Serine-Threonine Kinases/chemistry/genetics/*isolation & ; purification/*metabolism ; Signal Transduction ; Thylakoids/*enzymology ; Transcription, Genetic
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  • 93
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    Derepression of BDNF transcription involves calcium-dependent phosphorylation of MeCP2 (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-11-01
    Description: Mutations in MeCP2, which encodes a protein that has been proposed to function as a global transcriptional repressor, are the cause of Rett syndrome (RT T), an X-linked progressive neurological disorder. Although the selective inactivation of MeCP2 in neurons is sufficient to confer a Rett-like phenotype in mice, the specific functions of MeCP2 in postmitotic neurons are not known. We find that MeCP2 binds selectively to BDNF promoter III and functions to repress expression of the BDNF gene. Membrane depolarization triggers the calcium-dependent phosphorylation and release of MeCP2 from BDNF promoter III, thereby facilitating transcription. These studies indicate that MeCP2 plays a key role in the control of neuronal activity-dependent gene regulation and suggest that the deregulation of this process may underlie the pathology of RT T.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Wen G -- Chang, Qiang -- Lin, Yingxi -- Meissner, Alexander -- West, Anne E -- Griffith, Eric C -- Jaenisch, Rudolf -- Greenberg, Michael E -- HD 18655/HD/NICHD NIH HHS/ -- NS28829/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2003 Oct 31;302(5646):885-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuroscience, Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14593183" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain-Derived Neurotrophic Factor/*genetics ; Calcium/*metabolism ; Cell Membrane/physiology ; Cells, Cultured ; *Chromosomal Proteins, Non-Histone ; Cloning, Molecular ; CpG Islands ; DNA Methylation ; DNA-Binding Proteins/*metabolism ; Electrophoretic Mobility Shift Assay ; *Gene Expression Regulation ; Gene Silencing ; Histones/metabolism ; Methyl-CpG-Binding Protein 2 ; Methylation ; Mice ; Mice, Knockout ; Neurons/metabolism/physiology ; Phosphorylation ; Potassium Chloride/pharmacology ; Precipitin Tests ; Promoter Regions, Genetic ; Rats ; *Repressor Proteins ; Rett Syndrome/genetics ; *Transcription, Genetic
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    Diverse psychotomimetics act through a common signaling pathway (2003)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2003-11-25
    Description: Three distinct classes of drugs: dopaminergic agonists (such as D-amphetamine), serotonergic agonists (such as LSD), and glutamatergic antagonists (such as PCP) all induce psychotomimetic states in experimental animals that closely resemble schizophrenia symptoms in humans. Here we implicate a common signaling pathway in mediating these effects. In this pathway, dopamine- and an adenosine 3',5'-monophosphate (cAMP)-regulated phospho-protein of 32 kilodaltons (DARPP-32) is phosphorylated or dephosphorylated at three sites, in a pattern predicted to cause a synergistic inhibition of protein phosphatase-1 and concomitant regulation of its downstream effector proteins glycogen synthesis kinase-3 (GSK-3), cAMP response element-binding protein (CREB), and c-Fos. In mice with a genetic deletion of DARPP-32 or with point mutations in phosphorylation sites of DARPP-32, the effects of D-amphetamine, LSD, and PCP on two behavioral parameters-sensorimotor gating and repetitive movements-were strongly attenuated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Svenningsson, Per -- Tzavara, Eleni T -- Carruthers, Robert -- Rachleff, Ilan -- Wattler, Sigrid -- Nehls, Michael -- McKinzie, David L -- Fienberg, Allen A -- Nomikos, George G -- Greengard, Paul -- DA10044/DA/NIDA NIH HHS/ -- MH40899/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2003 Nov 21;302(5649):1412-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14631045" target="_blank"〉PubMed〈/a〉
    Keywords: 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine/pharmacology ; Animals ; Brain/drug effects/*metabolism ; Central Nervous System Agents/*pharmacology ; Corpus Striatum/drug effects/metabolism ; Cyclic AMP Response Element-Binding Protein/metabolism ; Dextroamphetamine/pharmacology ; Dopamine/metabolism ; Dopamine and cAMP-Regulated Phosphoprotein 32 ; Frontal Lobe/drug effects/metabolism ; Genes, fos ; Glycogen Synthase Kinase 3/metabolism ; Lysergic Acid Diethylamide/pharmacology ; Male ; Mice ; Mice, Knockout ; Motor Activity/drug effects ; Nerve Tissue Proteins/metabolism ; Phencyclidine/pharmacology ; Phosphoprotein Phosphatases/antagonists & inhibitors ; Phosphoproteins/*metabolism ; Phosphorylation ; Protein Phosphatase 1 ; RNA, Messenger/genetics/metabolism ; Receptors, Dopamine D1/genetics/metabolism ; Reflex, Startle/drug effects ; *Signal Transduction ; Synaptic Transmission
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  • 95
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    Ecology and evolution. Darwin's hummingbirds (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-04-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Altshuler, Douglas L -- Clark, Christopher James -- New York, N.Y. -- Science. 2003 Apr 25;300(5619):588-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bioengineering, California Institute of Technology, Pasadena, CA 91104, USA. doug@caltech.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12714728" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Beak/*anatomy & histology ; *Biological Evolution ; Birds/*anatomy & histology/physiology ; Body Constitution ; Dominica ; Ecosystem ; Feeding Behavior ; Female ; Flowers/*anatomy & histology ; Heliconiaceae/*anatomy & histology ; Male ; Pigmentation ; Saint Lucia ; *Sex Characteristics
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  • 96
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    The dog genome: survey sequencing and comparative analysis (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-09-27
    Description: A survey of the dog genome sequence (6.22 million sequence reads; 1.5x coverage) demonstrates the power of sample sequencing for comparative analysis of mammalian genomes and the generation of species-specific resources. More than 650 million base pairs (〉25%) of dog sequence align uniquely to the human genome, including fragments of putative orthologs for 18,473 of 24,567 annotated human genes. Mutation rates, conserved synteny, repeat content, and phylogeny can be compared among human, mouse, and dog. A variety of polymorphic elements are identified that will be valuable for mapping the genetic basis of diseases and traits in the dog.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kirkness, Ewen F -- Bafna, Vineet -- Halpern, Aaron L -- Levy, Samuel -- Remington, Karin -- Rusch, Douglas B -- Delcher, Arthur L -- Pop, Mihai -- Wang, Wei -- Fraser, Claire M -- Venter, J Craig -- New York, N.Y. -- Science. 2003 Sep 26;301(5641):1898-903.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Institute for Genomic Research, Rockville, MD 20850, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14512627" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosomes, Mammalian/genetics ; Computational Biology ; Conserved Sequence ; Contig Mapping ; DNA, Intergenic ; Dogs/*genetics ; Genetic Variation ; *Genome ; Genome, Human ; Genomics ; Humans ; Long Interspersed Nucleotide Elements ; Male ; Mice/genetics ; Molecular Sequence Data ; Mutation ; Phylogeny ; Physical Chromosome Mapping ; Polymorphism, Single Nucleotide ; RNA, Messenger/genetics ; Repetitive Sequences, Nucleic Acid ; Sequence Alignment ; *Sequence Analysis, DNA ; Short Interspersed Nucleotide Elements ; Synteny
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    Disruption of transforming growth factor-beta signaling in ELF beta-spectrin-deficient mice (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-01-25
    Description: Disruption of the adaptor protein ELF, a beta-spectrin, leads to disruption of transforming growth factor-beta (TGF-beta) signaling by Smad proteins in mice. Elf-/- mice exhibit a phenotype similar to smad2+/-/smad3+/- mutant mice of midgestational death due to gastrointestinal, liver, neural, and heart defects. We show that TGF-beta triggers phosphorylation and association of ELF with Smad3 and Smad4, followed by nuclear translocation. ELF deficiency results in mislocalization of Smad3 and Smad4 and loss of the TGF-beta-dependent transcriptional response, which could be rescued by overexpression of the COOH-terminal region of ELF. This study reveals an unexpected molecular link between a major dynamic scaffolding protein and a key signaling pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tang, Yi -- Katuri, Varalakshmi -- Dillner, Allan -- Mishra, Bibhuti -- Deng, Chu-Xia -- Mishra, Lopa -- R01 DK56111/DK/NIDDK NIH HHS/ -- R01 DK58637/DK/NIDDK NIH HHS/ -- R03 DK53861/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2003 Jan 24;299(5606):574-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Developmental Biology, Department of Medicine, Georgetown University, Washington, DC 20007, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12543979" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Multiple ; Animals ; Carrier Proteins/metabolism ; Cell Membrane/metabolism ; Cell Nucleus/metabolism ; Contractile Proteins/metabolism ; DNA-Binding Proteins/metabolism ; Embryonic and Fetal Development ; Filamins ; Gene Targeting ; Genes, fos ; Liver/abnormalities/embryology/*metabolism ; Mice ; Mice, Knockout ; Microfilament Proteins/metabolism ; Microscopy, Confocal ; Mutation ; Phenotype ; Phosphorylation ; Platelet-Derived Growth Factor/pharmacology ; *Signal Transduction ; Smad2 Protein ; Smad3 Protein ; Smad4 Protein ; Spectrin/genetics/*metabolism ; Trans-Activators/metabolism ; Transcriptional Activation ; Transforming Growth Factor beta/*metabolism/pharmacology ; Tumor Cells, Cultured
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    Genetics. Where do male genes live? (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-02-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schlotterer, Christian -- New York, N.Y. -- Science. 2003 Jan 31;299(5607):670-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Tierzucht und Genetik, Veterinarmedizinische Universitat Wien, 1210 Wien, Austria. christian.schloetterer@vu-wien.ac.at〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12560539" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anopheles/genetics ; Chromosome Mapping ; Chromosomes/*genetics ; Drosophila melanogaster/*genetics ; Evolution, Molecular ; Female ; *Gene Expression ; Gene Expression Profiling ; *Genes, Insect ; Genes, Recessive ; Genetic Linkage ; Male ; Models, Genetic ; Oligonucleotide Array Sequence Analysis ; Retroelements ; Sex Characteristics ; X Chromosome/*genetics ; Y Chromosome/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 99
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    'Monogamous' gibbons really swing (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-05-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gibbons, A -- New York, N.Y. -- Science. 1998 May 1;280(5364):677-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9599145" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Behavior, Animal ; Female ; *Hylobates ; Male ; *Sexual Behavior, Animal ; *Social Behavior
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 100
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    Anthropologists probe genes, brains at annual meeting (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-05-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gibbons, A -- New York, N.Y. -- Science. 1998 Apr 17;280(5362):380-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9575083" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Anthropology, Physical ; Biological Evolution ; Brain/*anatomy & histology ; Computer Simulation ; DNA, Mitochondrial/genetics ; Female ; *Genetics, Population ; *Hinduism/history ; History, Ancient ; Hominidae/*anatomy & histology ; Humans ; India ; Male ; Models, Anatomic ; Y Chromosome/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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