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  • Binding Sites
  • Amino Acid Sequence
  • American Association for the Advancement of Science (AAAS)  (30)
  • American Association of Petroleum Geologists (AAPG)
  • 1975-1979  (30)
Collection
Publisher
  • American Association for the Advancement of Science (AAAS)  (30)
  • American Association of Petroleum Geologists (AAPG)
Years
Year
  • 1
    Publication Date: 1979-03-30
    Description: The amino terminal acid sequences of several mouse leukemia virus phosphoproteins (p12) show definite homology with the amino terminal conserved region of H5 histones, the phosphorylated nuclear proteins of nucleated erythrocytes. Differences in the amino acid compositions of the two groups of proteins seem to rule out the possibility that they evolved from a single common ancestral gene. The finding of sequence homology between viral p12's and cellular histones, however, is consistent with evolution of retrovirus structural proteins by a process of differentiation from preexisting cellular genes. The conserved primary and secondary structure at the amino terminal region, common to both groups of proteins, may be related to their common function of nucleic acid binding modulated by phosphorylation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Henderson, L E -- Gilden, R V -- Oroszlan, S -- New York, N.Y. -- Science. 1979 Mar 30;203(4387):1346-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/218289" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Carrier Proteins ; Cell Nucleus/analysis ; Chickens/blood ; Erythrocytes/analysis ; Geese/blood ; *Histones ; Leukemia Virus, Murine/*analysis ; Nucleic Acids/metabolism ; *Phosphoproteins ; Structure-Activity Relationship ; *Viral Proteins
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1979-12-07
    Description: A laser-induced luminescence technique is introduced for probing the structure and equilibria of lanthanide complexes and lanthanide ion binding to macromolecules. The method involves the excitation of the 7F0 leads to 5D0 transition between nondegenerate levels in the europium(III) ion by means of an intense pulsed dye laser source. Excitation profits obtained by scanning the laser through the transition region reveal distinct peaks characteristic of individual europium(III) ion environments. The technique may be used to characterize the species present in complex equilibria in solution or to study europium(III) binding to macromolecules. Distinct europium(III) binding sites in thermolysin with long and short excited state lifetimes are observed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Horrocks, W D Jr -- Sudnick, D R -- New York, N.Y. -- Science. 1979 Dec 7;206(4423):1194-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/505007" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; *Europium ; Luminescence ; Protein Binding ; Spectrum Analysis/methods ; Thermolysin
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  • 3
    Publication Date: 1979-02-09
    Description: A sensitive and specific radioimmunoassay for the insulin receptor has been developed employing receptor autoantibodies from the serum of a patient with insulin-resistant diabetes. The assay detects insulin binding sites at concentrations as low as 0.1 nanomolar; distinguishes between receptors originating from human placental membranes, human lymphoblastoid cells, and mouse liver membranes; and measures the receptor independently of its binding function. Down-regulation, or loss of binding after exposure to insulin, is associated with loss of immunoreactive receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harrison, L C -- Flier, J -- Itin, A -- Kahn, C R -- Roth, J -- New York, N.Y. -- Science. 1979 Feb 9;203(4380):544-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/83675" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen-Antibody Reactions ; Binding Sites ; Binding Sites, Antibody ; Epitopes ; Female ; Humans ; Liver/analysis ; Lymphocytes/analysis ; Mice ; Placenta/analysis ; Pregnancy ; Radioimmunoassay/methods ; Receptor, Insulin/analysis/*immunology ; Solubility
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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-09-07
    Description: Iodinated beta H-[2-D-alanine]endorphin exhibits specific binding to cultured human lymphocytes. The binding is inhibited by low concentrations of beta-endorphin and its D-alanine derivative, but is not affected by opiate agonists and antagonists, or by enkephalin analogs, beta-lipotropin, adrenocorticotrophic hormone, or alpha-melanocyte-stimulating hormone; this suggests the existence of a specific, non-opiate binding site (receptor) for beta-endorphin. The carboxy-terminal region of beta-endorphin is essential for this binding activity, since alpha-endorphin is not active. beta-Endorphin may be a circulating hormone with peripheral physiological effects that are not primarily mediated through interactions with opiate or enkephalin receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hazum, E -- Chang, K J -- Cuatrecasas, P -- New York, N.Y. -- Science. 1979 Sep 7;205(4410):1033-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/224457" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cells, Cultured ; Endorphins/blood/*metabolism ; Humans ; Lymphocyte Activation ; Lymphocytes/*metabolism ; Receptors, Drug/*metabolism ; Receptors, Opioid/metabolism ; Stress, Physiological/metabolism ; Structure-Activity Relationship
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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-04-13
    Description: Removal of fibrinopeptide B from human fibrinogen by reaction with the procoagulant enzyme from copperhead snake venom below 25 degrees C resulted in tight aggregation of the fibrinogen, which, in turn, progressively blocked a concomitant but sluggish release of fibrinopeptide A by the enzyme. When the clots obtained at less than 25 degrees C were warmed, they dissociated into soluble aggregates and monomers. Release of fibrinopeptide A then resumed, and a secondary coagulation followed. The aggregation induced by release of fibrinopeptide B itself involves a plasmin-susceptible segment located just distal to B in the B beta chain of fibrinogen, a segment previously shown to be of little importance in the aggregation induced by release of fibrinopeptide A.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shainoff, J R -- Dardik, B N -- New York, N.Y. -- Science. 1979 Apr 13;204(4389):200-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/155308" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Crotalid Venoms/*metabolism ; Fibrinogen/*metabolism ; Fibrinolysin/metabolism ; Fibrinopeptide A/metabolism ; Fibrinopeptide B/*metabolism ; Humans ; Molecular Weight ; Protein Binding ; Temperature
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  • 6
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-03-09
    Description: Three hypotheses to explain the amino acid composition of proteins are inconsistent (P congruent to 10(-9) with the experimental data for beta-galactosidase from Escherichia coli. The exceptional length of this protein, 1021 residues, permits rigorous tests of these hypotheses without complication from statistical artifacts. Either this protein is not at compositional equilibrium, which is unlikely from knowledge about other proteins, or the evolution of this protein and its coding gene have not been selectively neutral. However, the composition of approximately 60 percent of the molecule is consistent with either a selectively neutral or nonneutral evolutionary process.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holmquist, R -- New York, N.Y. -- Science. 1979 Mar 9;203(4384):1012-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/106468" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acids/analysis ; Base Sequence ; Biological Evolution ; Escherichia coli/enzymology ; Galactosidases/*genetics ; Genes ; Genetic Code ; *Selection, Genetic ; beta-Galactosidase/analysis/*genetics
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  • 7
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-10-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holmquist, R -- Conroy, T -- New York, N.Y. -- Science. 1979 Oct 12;206(4415):235.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/113875" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Escherichia coli/*genetics ; Galactosidases/*genetics ; Probability ; Selection, Genetic ; beta-Galactosidase/*genetics
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  • 8
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-10-19
    Description: The I region of the major histocompatibility complex contains immune response genes that display considerable polymorphism; that is, there are many alleles at each locus. These genes regulate the immune response to antigen by mediating intercellular communication among lymphoreticular cells. An analysis of the primary structure of the products of two subregions of (I-A, I-E/C) was undertaken in order to understand the genetic organization of the region, the evolution of the genes and, eventually, their function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Uhr, J W -- Capra, J D -- Vitetta, E S -- Cook, R G -- New York, N.Y. -- Science. 1979 Oct 19;206(4416):292-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/113876" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Antigens, Surface/analysis/*genetics ; *Cell Communication ; *Genes, MHC Class II ; *Immunity, Cellular ; Lymphocytes/immunology ; Macromolecular Substances ; Macrophages/immunology ; Molecular Weight ; Polymorphism, Genetic
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  • 9
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-04-27
    Description: Space-filling models of yeast hexokinase, adenylate kinase, and phosphoglycerate kinase drawn by computer clearly portray the bilobal character of these phosphoryl transfer enzymes, and the deep cleft which is formed between the lobes. A dramatic conformational change occurs in hexokinase as glucose binds to the bottom of the cleft, which causes the two lobes of hexokinase to come together. A substrate-induced closing of the active site cleft is postulated to occur in other kinases as well. This change may provide a mechanism by which some of these enzymes reduce their inherent adenosine triphosphatase activity and could be a general requirement of the kinase reaction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anderson, C M -- Zucker, F H -- Steitz, T A -- New York, N.Y. -- Science. 1979 Apr 27;204(4391):375-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/220706" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylate Kinase ; Binding Sites ; Catalysis ; Hexokinase ; Models, Molecular ; Phosphoglycerate Kinase ; *Phosphotransferases ; Protein Conformation ; Saccharomyces cerevisiae/enzymology ; Structure-Activity Relationship
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  • 10
    Publication Date: 1979-06-22
    Description: The pentapeptide arginyl-lysyl-aspartyl-valyl-tyrosine, corresponding to amino acid residues 32--36 in thymopoietin, was synthesized. In vitro, this pentapeptide induced the differentiation of murine prothymocytes to thymocytes and inhibited differentiative induction of cells of the B lineage. This combination of actions is presently unique to the parent molecule thymopoietin. In vivo, the pentapeptide reduced the high numbers of autologous rosette-forming cells normally present in the spleens of athymic mice; this also is a property of thymopoietin. These results suggest that this readily synthesized pentapeptide corresponds to an active site of thymopoietin and might serve as a therapeutic substitute for thymopoietin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldstein, G -- Scheid, M P -- Boyse, E A -- Schlesinger, D H -- Van Wauwe, J -- New York, N.Y. -- Science. 1979 Jun 22;204(4399):1309-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451537" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antigens, Surface/analysis ; Cell Differentiation/drug effects ; Complement System Proteins ; Isoantigens/analysis ; Lymphocytes/cytology/*immunology ; Mice ; Mice, Nude/immunology ; Oligopeptides/chemical synthesis/*pharmacology ; Receptors, Drug/analysis ; Structure-Activity Relationship ; Thymopoietins/*pharmacology ; Thymus Hormones/*pharmacology
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  • 11
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-01-12
    Description: Both normal human serum and supernatant from explanted malignant tumors contained a heat-stable low-molecular-weight factor that inhibited monocyte activation in vitro. In contrast, serum from individuals with solid tumors enhanced monocyte activation. It is suggested that the systemic activation of monocytes that occurs in malignant disease may be an appropriate host response but that successful tumors may continue to grow because they subvert the normal physiological signal for inhibition of macrophage activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rhodes, J -- Bishop, M -- Benfield, J -- New York, N.Y. -- Science. 1979 Jan 12;203(4376):179-82.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/758686" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Carcinoma/*immunology ; Carcinoma, Squamous Cell/immunology ; Chemotaxis ; Colonic Neoplasms/*immunology ; Humans ; Immunity, Cellular ; Immunoglobulin Fc Fragments ; Lung Neoplasms/*immunology ; Macrophages/*immunology ; Monocytes/*immunology ; Rosette Formation
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  • 12
    Publication Date: 1979-10-26
    Description: In the brains of newborn rats, about half of the tubulin molecules are modified posttranslationally by the addition of an aromatic amino acid at the carboxyl terminus of the alpha chain. Of the added residues, 96 percent are tyrosine and 4 percent are phenylalanine. After induction of hyperphenylalaninemia, the proportion of tubulin molecules containing carboxyl terminal phenylalanine increases up to eightfold and the pool of tyrosine-containing molecules decreases by an equivalent amount.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rodriguez, J A -- Borisy, G G -- New York, N.Y. -- Science. 1979 Oct 26;206(4417):463-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/574315" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Brain/*metabolism ; Cytoplasm/metabolism ; *Disease Models, Animal ; Humans ; Microtubules/metabolism ; Phenylalanine/*metabolism ; Phenylketonurias/*metabolism ; Protein Binding ; Rats ; Tubulin/*metabolism ; Tyrosine/metabolism
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  • 13
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-09-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Demoulin, V -- New York, N.Y. -- Science. 1979 Sep 7;205(4410):1036-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472727" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cytochromes/genetics ; Ferredoxins/genetics ; *Phylogeny ; Proteins/*genetics ; RNA, Ribosomal/*genetics
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  • 14
    Publication Date: 1979-09-21
    Description: The bis-acridine ring system forms the basis for new biophysical probes of novel stereochemistry. Spectral data indicate that certain alkylene bridged bis-9-aminoacridines have a parallel plane conformation of predictable interplane distance. The parallel plane conformation is independent of solvent and thus is different from nucleic acid systems. This stable conformation allows these compounds to be used as sensitive "rulers" for describing binding site geometry in cholinergic enzymes and in the delineation of the mechanism of allosteric control in acetylcholinesterase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Himel, C M -- Taylor, J L -- Pape, C -- Millar, D B -- Christopher, J -- Kurlansik, L -- New York, N.Y. -- Science. 1979 Sep 21;205(4412):1277-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472743" target="_blank"〉PubMed〈/a〉
    Keywords: *Acetylcholinesterase/metabolism ; *Acridines ; Binding Sites ; Kinetics ; Molecular Conformation ; Phosphorylation ; Protein Conformation ; Spectrophotometry, Ultraviolet
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  • 15
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-02-09
    Description: Like physicists striving to develop a unified field theory, immunologists are attempting to bring order to the microcosmos of defense reactions. Indications are that one of the most important constants in this microcosmos is the major histocompatibility complex (MHC) of the species. A test of any interpretation of the MHC's role in immunity is how well it explains this system's polymorphism. One of the most crucial questions an MHC hypothesis must answer is: Why are there so many alleles at this complex?〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Klein, J -- New York, N.Y. -- Science. 1979 Feb 9;203(4380):516-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/104386" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Blood Proteins/genetics ; Genes ; *Genes, MHC Class II ; Genetic Linkage ; H-2 Antigens/*genetics ; Lymphocytes/immunology ; *Major Histocompatibility Complex ; Mice/*immunology ; Phenotype ; Polymorphism, Genetic
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  • 16
    Publication Date: 1979-08-10
    Description: The nucleotide sequence of a DNA complementary to human growth hormone messenger RNA was cloned; it contains 29 nucleotides in its 5' untranslated region, the 651 nucleotides coding for the prehormone, and the entire 3' untranslated region (108 nucleotides). The data reported predict the previously unknown sequence of the signal peptide of human growth hormone and, by comparison with the previously determined sequences of rat growth hormone and human chorionic somatomammotropin, strengthens the hypothesis that these genes evolved by gene duplication from a common ancestral sequence. The human growth hormone gene sequences have been linked in phase to a fragment of the trp D gene of Escherichia coli in a plasmid vehicle, and a fusion protein is synthesized at high level (approximately 3 percent of bacterial protein) under the control of the regulatory region of the trp operon. This fusion protein (70 percent of whose amino acids are coded for by the human growth hormone gene) reacts specifically with antibodies to human growth hormone and is stable in E. coli.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martial, J A -- Hallewell, R A -- Baxter, J D -- Goodman, H M -- New York, N.Y. -- Science. 1979 Aug 10;205(4406):602-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/377496" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cattle ; DNA, Recombinant/*metabolism ; Escherichia coli/*metabolism ; Growth Hormone/*biosynthesis ; Humans ; Pituitary Gland/metabolism ; Pituitary Neoplasms/metabolism ; *Plasmids ; Poly A/metabolism ; Prolactin/biosynthesis ; *Protein Biosynthesis ; RNA, Messenger/metabolism ; *Transcription, Genetic
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  • 17
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1979-05-04
    Description: Estradiol-binding proteins with the properties of putative estrogen receptors are present in cytosol extracts of embryonic mouse hypothalamus and other brain regions. These embryonic estrogen receptors are adultlike in their high affinity and limited capacity for estradiol, sensitivity to diethylstilbestrol, ability to adhere to DNA, and behavior during DNA-cellulose affinity chromatography. As early as 4 days before birth, mouse hypothalamus has approximately 40 percent of the adult concentration of hypothalamic estrogen receptors with these properties. These observations raise the possibility that embryonic rodent brain has the biochemical potential to respond to sex hormones and that the critical period of brain sexual differentiation could be initiated prenatally.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vito, C C -- Fox, T O -- New York, N.Y. -- Science. 1979 May 4;204(4392):517-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432656" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Binding Sites ; Brain/*embryology ; Chromatography, Affinity ; Cytosol/metabolism ; Hypothalamus/embryology ; Mice ; Receptors, Estrogen/*metabolism ; Sexual Maturation
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  • 18
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-08
    Description: The reactive superoxide radical, O2-, formerly of concern only to radiation chemists and radiobiologists, is now understood to be a normal product of the biological reduction of molecular oxygen. An unusual family of enzymes, the superoxide dismutases, protect against the deleterious actions of this radical by catalyzing its dismutation to hydrogen peroxide plus oxygen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fridovich, I -- New York, N.Y. -- Science. 1978 Sep 8;201(4359):875-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/210504" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Catalase/metabolism ; Free Radicals ; Inflammation/metabolism ; Kinetics ; Metals ; Oxidation-Reduction ; Oxygen/*metabolism ; Paraquat/pharmacology ; Peroxidases/metabolism ; Superoxide Dismutase/*metabolism ; Superoxides/*metabolism/toxicity
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  • 19
    Publication Date: 1978-06-16
    Description: Throbin-activated human platelets cause agglutination of trypsinized, formalinized bovine erythrocytes. This lectin activity of stimulated platelets was blocked by galactosamine, glucosamine, mannosamine, lysine, and arginine, but not by N-acetylated sugars, other neutral sugars, or other amino acids. Inhibitors of the thrombin-induced lectin activity also blocked thrombin-induced platelet aggregation. It appears that a membrane surface component that has lectin activity mediates platelet aggregation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gartner, T K -- Williams, D C -- Minion, F C -- Phillips, D R -- New York, N.Y. -- Science. 1978 Jun 16;200(4347):1281-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663608" target="_blank"〉PubMed〈/a〉
    Keywords: *Agglutinins ; Amino Acids/pharmacology ; Amino Sugars/pharmacology ; Animals ; Binding Sites ; Cytochalasin B/pharmacology ; *Hemagglutinins ; Humans ; Membrane Proteins/blood ; Platelet Aggregation/*drug effects ; Prostaglandins E/pharmacology ; Species Specificity ; Thrombin/*pharmacology
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  • 20
    Publication Date: 1978-09-29
    Description: The Z variant of alpha1-antitrypsin was isolated by a new technique from the liver of a patient homozygous for the Z allele of the protease inhibitor locus. The material was homogenous and antigenically competent but had no protease inhibiting capacity. An interesting correlation was found between the subcellular localization and the carbohydrate composition of the Z variant from liver. Carbohydate analysis of this glycoprotein showed an absence of galactose and sialic acid, an appreciable decrease in N-acetylglucosamine, and an almost twofold increase in mannose residues. These data indicate a considerable slowdown in the processing of the oligosaccharides of liver Z variant. In spite of the absence of sialyl residues, the liver Z varant was microheterogeneous by analytical isoelectric focusing. The isoproteins of liver Z variant coincided with those of asialo M variant in the focusing field.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hercz, A -- Katona, E -- Cutz, E -- Wilson, J R -- Barton, M -- New York, N.Y. -- Science. 1978 Sep 29;201(4362):1229-32.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/308696" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Carbohydrate Metabolism ; Female ; Galactose/metabolism ; Glycoproteins/genetics ; Homozygote ; Humans ; Liver/metabolism ; Mannose/metabolism ; Middle Aged ; Mutation ; Phenotype ; Sialic Acids/metabolism ; alpha 1-Antitrypsin/*genetics/metabolism
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  • 21
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-01-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwartz, R M -- Dayhoff, M O -- New York, N.Y. -- Science. 1978 Jan 27;199(4327):395-403.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/202030" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; *Biological Evolution ; *Cells ; *Chloroplasts ; Computers ; Cytochrome c Group ; *Eukaryotic Cells ; Ferredoxins ; *Mitochondria ; Nucleic Acids ; *Prokaryotic Cells ; Proteins ; RNA, Ribosomal
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  • 22
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-11-10
    Description: The collagens of all major invertebrate phyla have been studied, but characterization has been thorough in only a few classes and in no case in the detail (such as sequence analysis) known for vertebrate collagen. Biochemical data on insect collagen are particularly sparse. Invertebrate and vertebrate collagens are strikingly similar, with some notably unique features in annelids and nematodes. Present data do not support the suggestion that invertebrate collagens resemble vertebrate basement membrane collagen. In invertebrates, as in vertebrates, collagens of specific tissues show differenes that probably reflect individual tissue requirements.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Adams, E -- New York, N.Y. -- Science. 1978 Nov 10;202(4368):591-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/212833" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Carbohydrates/analysis ; Collagen/*analysis ; Glycoproteins/analysis ; Invertebrates/*analysis/enzymology ; Macromolecular Substances ; Molecular Weight ; Polymorphism, Genetic ; Procollagen-Proline Dioxygenase/metabolism ; Species Specificity
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  • 23
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-11-24
    Description: Seizures induced in the rat by electroshock or by injections of pentylenetetrazol increase the specific binding of diazepam to putative receptor sites in cerebral cortical membranes. The enhancement of diazepam binding results from a rapid increase in the number of available binding sites rather than a change in receptor affinity. The postictal increase in cortical benzodiazepine receptors suggests that the cerebral cortex might be more sensitive to the anticonvulsant effects of the benzodiazepines after seizures. This observation may be related to the mechanism of action of these drugs in the treatment of recurrent seizures such as status epilepticus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paul, S M -- Skolnick, P -- New York, N.Y. -- Science. 1978 Nov 24;202(4370):892-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/715447" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anoxia/metabolism ; Binding Sites ; Brain/*metabolism ; Cerebral Cortex/metabolism ; Diazepam/*metabolism ; Electroshock ; Kinetics ; Male ; Pentylenetetrazole ; Rats ; Receptors, Drug/*metabolism ; Seizures/*metabolism ; Synaptosomes/metabolism
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  • 24
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-29
    Description: Electrostatic effects dominate many aspects of protein behavior. When polypeptide chains fold up, most polar side chains seek the exterior, where they can be solvated. Water bound in the interior has been found between the domains of enzymes of the chymotrypsin family, and between the subunits of hemoglobin and tobacco mosaic virus protein. Assembly of this protein from disk to virus is triggered by electrostatic interactions between neighboring subunits. Lysozyme stabilizes the constellation of charges involved in the transition state of its substrate by both permanent and induced dipoles. All factors that lower the oxygen affinity of hemoglobin act by strengthening the salt bridges that constrain its quaternary deoxy (T) structure. Enzymes of thermophile bacteria owe their extra stability mostly to additional salt bridges. The rate of denaturation of hemoglobins by alkali is determined by the ionization of internal side chains with pK's of about 12.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Perutz, M F -- New York, N.Y. -- Science. 1978 Sep 29;201(4362):1187-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/694508" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Amino Acid Sequence ; Catalysis ; Ions ; Macromolecular Substances ; Protein Conformation ; Protein Denaturation ; *Proteins ; Salts ; Structure-Activity Relationship ; Temperature ; Viruses/ultrastructure ; Water
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  • 25
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-09-15
    Description: The principles of the competitive-binding assay were used in conjunction with light microscopic radioautography to demonstrate specific prolactin binding sites localized on ependyma of the rat choroid plexus, a previously unknown prolactin target tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walsh, R J -- Posner, B I -- Kopriwa, B M -- Brawer, J R -- New York, N.Y. -- Science. 1978 Sep 15;201(4360):1041-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/684427" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; Binding Sites ; Binding, Competitive ; Brain/cytology/*metabolism ; Female ; Iodine Radioisotopes ; Male ; Prolactin/*metabolism ; Rats
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  • 26
    Publication Date: 1978-01-20
    Description: Application of information derived from a three-dimensional model of vasopressin bound to its antidiuretic receptor has resulted in the design and synthesis of a potent analog, [1-deamino, 2-phenylalanine, 7-(3,4-dehydroproline)]-arginine vasopressin; this analog has a specific antidiuretic activity of 13,000 +/- 1,250 units per milligram; noteworthy at these doses is the absence of any detectable pressor activity. Three modifications based on conformational considerations were introduced into the vasopressin molecule in preparing the analog: (i) to enhance binding, a double bond was introduced into the side chain of an amino acid residue occupying a corner position of a beta turn in the vasopressin conformation, (ii) the hydroxyl moiety was deleted from Tyr2, and (iii) to tighten the backbone structure and to enhance the enzymatic resistance of the analog, the NH2-terminal amino group was deleted.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, C W -- Walter, R -- New York, N.Y. -- Science. 1978 Jan 20;199(4326):297-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/619455" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Deamino Arginine Vasopressin/analogs & derivatives ; Diuresis/drug effects ; Heart Rate/drug effects ; Protein Conformation ; Structure-Activity Relationship ; Vasopressins/*analogs & derivatives/pharmacology
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  • 27
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-06-16
    Description: Antibodies to insulin receptors purified from rat liver membranes do not complete with [125I]insulin for binding to the insulin receptor but do precipitate solubilized receptors labeled with [125I]insulin. These antibodies have the insulin-like activities of enhancing glucose oxidation and inhibiting epinephrine-induced lipolysis in rat adipocytes. Thus, antibody binds to the receptor at a different site from that to which insulin binds, yet the interaction can initiate an effective biological response. These results indicate that the previously studied insulin-binding sites are the physiological macromolecular receptors for insulin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jacobs, S -- Chang, K J -- Cuatrecasas, P -- New York, N.Y. -- Science. 1978 Jun 16;200(4347):1283-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663609" target="_blank"〉PubMed〈/a〉
    Keywords: Acanthosis Nigricans/physiopathology ; Adipose Tissue/metabolism ; Animals ; *Antibodies ; Antigen-Antibody Reactions ; Binding Sites ; Binding, Competitive ; Biological Transport ; Epinephrine/pharmacology ; Glucose/metabolism ; Insulin/metabolism ; Lipid Mobilization ; Liver/immunology ; Rats ; Receptor, Insulin/*physiology
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  • 28
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1978-10-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schally, A V -- New York, N.Y. -- Science. 1978 Oct 6;202(4363):18-28.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/99816" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Awards and Prizes ; Gonadotropin-Releasing Hormone/isolation & purification/physiology ; Hormones/pharmacology ; Hypothalamic Hormones/*physiology ; Hypothalamus/*physiology ; Pituitary Gland, Anterior/*physiology ; Somatostatin/isolation & purification/physiology ; Structure-Activity Relationship ; Thyrotropin-Releasing Hormone/isolation & purification
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  • 29
    Publication Date: 1978-06-09
    Description: The amino acid structure for the Fc portion of a canine immunoglobulin mu chain was determined. The sequence was compared with those of two human mu chains, and a high degree of interspecies homology was observed. The preservation of primary structure between species is probably reflective of the unique functions associated with the immunoglobulin M class.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wasserman, R L -- Capra, J D -- New York, N.Y. -- Science. 1978 Jun 9;200(4346):1159-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/653360" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Evolution ; Dogs ; Humans ; *Immunoglobulin Fc Fragments ; *Immunoglobulin M ; Species Specificity
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  • 30
    Publication Date: 1978-12-22
    Description: Two globin-related clones isolated from collections of bacteriophages containing unfractionated Eco RI fragments of human and mouse DNA were characterized. Charon3AHs51.1Hbgamma includes 2.7 kilobase pairs of human DNA containing a large part of a fetal gamma globin chain structural gene; Charon 3AMm30.5 includes 4.7 kilobase pairs of mouse DNA related to alpha globin. The human fetal gamma globin gene has within its coding region two intervening sequences of noncoding DNA, IVS 1 and IVS 2, of approximately 1-0 and 900 base pairs. Sequence IVS 1 is located at the position of one of the two intervening sequences occurring in adult globin genes; IVS 2 is located at the position of the other.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smithies, O -- Blechl, A E -- Denniston-Thompson, K -- Newell, N -- Richards, J E -- Slightom, J L -- Tucker, P W -- Blattner, F R -- New York, N.Y. -- Science. 1978 Dec 22;202(4374):1284-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/725604" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Codon ; DNA Restriction Enzymes/metabolism ; DNA, Recombinant ; Fetal Hemoglobin/*genetics ; *Genes ; Globins/*genetics ; Humans ; Methods ; Mice ; Nucleic Acid Hybridization ; RNA, Messenger/genetics
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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