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  • Articles  (880)
  • Life and Medical Sciences  (793)
  • Base Sequence  (62)
  • Amino Acid Sequence  (43)
  • Organic Chemistry
  • 1985-1989  (880)
  • 1986  (880)
  • Medicine  (880)
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  • Articles  (880)
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  • 1985-1989  (880)
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  • 1
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    Identification of specific transducin alpha subunits in retinal rod and cone photoreceptors (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-10-03
    Description: Transducin is a guanyl nucleotide-binding protein that couples rhodopsin photolysis to hydrolysis of guanosine 3',5'-monophosphate in rod photoreceptor cells of vertebrate retinas. Several complementary DNA clones encoding transducin subunits have recently been characterized. One clone, isolated from a bovine retina complementary DNA library, encodes a previously unidentified polypeptide with an amino acid sequence 78% identical to the sequence of the alpha subunit of bovine rod outer segment transducin. Antibodies to a synthetic peptide with amino acid sequence derived specifically from this novel polypeptide recognize a 41-kilodalton polypeptide in homogenates of bovine retina. Localization of this polypeptide in bovine retina by indirect immunofluorescence demonstrates that it is expressed only in cone outer segments. Antibodies to specific sequences found only in the rod transducin alpha subunit recognize a polypeptide localized only in the rod outer segment. Therefore, bovine rod and cone cells each express structurally related yet significantly different forms of transducin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lerea, C L -- Somers, D E -- Hurley, J B -- Klock, I B -- Bunt-Milam, A H -- EYO 1311/EY/NEI NIH HHS/ -- EYO 1730/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1986 Oct 3;234(4772):77-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3529395" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cattle ; DNA/genetics ; Fluorescent Antibody Technique ; Membrane Proteins/genetics/*physiology ; Photoreceptor Cells/*metabolism ; Transducin
    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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  • 2
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    Structural heterogeneity and functional domains of murine immunoglobulin G Fc receptors (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-11-07
    Description: Binding of antibodies to effector cells by way of receptors to their constant regions (Fc receptors) is central to the pathway that leads to clearance of antigens by the immune system. The structure and function of this important class of receptors on immune cells is addressed through the molecular characterization of Fc receptors (FcR) specific for the murine immunoglobulin G isotype. Structural diversity is encoded by two genes that by alternative splicing result in expression of molecules with highly conserved extracellular domains and different transmembrane and intracytoplasmic domains. The proteins encoded by these genes are members of the immunoglobulin supergene family, most homologous to the major histocompatibility complex molecule E beta. Functional reconstitution of ligand binding by transfection of individual FcR genes demonstrates that the requirements for ligand binding are encoded in a single gene. These studies demonstrate the molecular basis for the functional heterogeneity of FcR's, accounting for the possible transduction of different signals in response to a single ligand.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ravetch, J V -- Luster, A D -- Weinshank, R -- Kochan, J -- Pavlovec, A -- Portnoy, D A -- Hulmes, J -- Pan, Y C -- Unkeless, J C -- AI 24322/AI/NIAID NIH HHS/ -- GM 36306/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1986 Nov 7;234(4777):718-25.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2946078" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; DNA/genetics ; Gene Expression Regulation ; Histocompatibility Antigens Class II/genetics ; Immunoglobulin G ; Lymphocytes/*physiology ; Macrophages/*physiology ; Membrane Proteins ; Mice ; Protein Conformation ; *Receptors, Fc/genetics ; Receptors, IgG ; Transcription, Genetic ; Transfection
    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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  • 3
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    Cell surface molecule associated with lymphocyte homing is a ubiquitinated branched-chain glycoprotein (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-02-21
    Description: Partial amino acid sequence analysis of a purified lymphocyte homing receptor demonstrates the presence of two amino termini, one of which corresponds precisely to the amino terminus of ubiquitin. This observation extends the province of this conserved polypeptide to the cell surface and leads to a proposed model of the receptor complex as a core polypeptide modified by glycosylation and ubiquitination. Independent antibodies to ubiquitin serve to identify additional cell surface species, an indication that ubiquitination of cell surface proteins may be more general. It is proposed that functional binding of lymphocytes to lymph node high endothelial venules might involve the ubiquitinated region of the receptor; if true, cell surface ubiquitin could play a more general role in cell-cell interaction and adhesion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Siegelman, M -- Bond, M W -- Gallatin, W M -- St John, T -- Smith, H T -- Fried, V A -- Weissman, I L -- AI 19512/AI/NIAID NIH HHS/ -- CA 09151/CA/NCI NIH HHS/ -- GM 31461/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1986 Feb 21;231(4740):823-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3003913" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antibodies, Monoclonal ; Cell Movement ; Endothelium/metabolism ; Glycoproteins/metabolism/*physiology ; Glycoside Hydrolases/metabolism ; High Mobility Group Proteins/*metabolism ; Lymphocytes/*physiology ; Mannosyl-Glycoprotein Endo-beta-N-Acetylglucosaminidase ; Membrane Proteins/metabolism/*physiology ; Mice ; Molecular Weight ; Protein Processing, Post-Translational ; Receptors, Cell Surface/metabolism/*physiology ; Ubiquitins/immunology/*metabolism
    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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  • 4
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    Tandem duplication of D-loop and ribosomal RNA sequences in lizard mitochondrial DNA (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-09-26
    Description: Some Cnemidophorus exsanguis have mitochondrial DNA's (mtDNA's) that are 22.2 kilobases (kb) in size, whereas most have mtDNA's of 17.4 kb. Restriction site mapping, DNA transfer hybridization experiments, and electron microscopy show that the size increment stems from the tandem duplication of a 4.8-kb region that includes regulatory sequences and transfer and ribosomal RNA genes. This observation is notable in that sequences outside of the control region are involved in major length variation. Besides revealing a novel form of mtDNA evolution in animals, these duplications provide a useful system for investigating the molecular and evolutionary biology of animal mtDNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moritz, C -- Brown, W M -- GM30144/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1986 Sep 26;233(4771):1425-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3018925" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; DNA Restriction Enzymes ; DNA, Mitochondrial/*genetics ; Lizards ; Microscopy, Electron ; Nucleic Acid Conformation ; Nucleic Acid Hybridization ; RNA, Ribosomal/*genetics ; Repetitive Sequences, Nucleic Acid
    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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  • 5
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    Equine infectious anemia virus gag and pol genes: relatedness to visna and AIDS virus (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-02-07
    Description: Comparison of HTLV-III, the putative AIDS virus, with other related viruses, may help to reveal more about the origin of AIDS in humans. In this study, the nucleotide sequence of the gag and pol genes of an equine infectious anemia virus (EIAV) proviral DNA clone was determined. The sequence was compared with that of HTLV-III and of visna, a pathogenic lentivirus of sheep. The results show that these viruses constitute a family clearly distinct from that of the type C viruses or the BLV-HTLV-I and -II group. Within the family, EIAV, HTLV-III, and visna appear to be equally divergent from a common evolutionary ancestor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stephens, R M -- Casey, J W -- Rice, N R -- N0I-C-23909/PHS HHS/ -- New York, N.Y. -- Science. 1986 Feb 7;231(4738):589-94.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3003905" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Codon ; DNA, Viral/genetics ; Deltaretrovirus/*genetics ; *Genes, Viral ; Horses ; Humans ; Infectious Anemia Virus, Equine/*genetics ; Mice ; Visna-maedi virus/*genetics
    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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  • 6
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    Identification and characterization of the protein encoded by the human N-myc oncogene (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-09
    Description: The human N-myc gene is related to the c-myc proto-oncogene, and has been shown to have transforming potential in vitro. Many studies have reported amplification of N-myc in human neuroblastoma and retinoblastoma cell lines. In primary tumors, amplification of the gene was found to correlate directly with behavior of the tumor. Specific restriction fragments of a partial complementary DNA clone of N-myc from LA-N-5 human neuroblastoma cells were placed into a bacterial expression vector for the purpose of producing antigens representative of the N-myc protein. Rabbits immunized with these antigens produced antisera that recognized a protein of 62-64 kilodaltons in neuroblastoma cells. By several criteria, this protein appears to be part of the same proto-oncogene family as the c-myc protein. Moreover, the antisera to fragments of this protein were capable of histochemically identifying malignant cells in clinical specimens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Slamon, D J -- Boone, T C -- Seeger, R C -- Keith, D E -- Chazin, V -- Lee, H C -- Souza, L M -- CA 16042/CA/NCI NIH HHS/ -- CA 36827/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1986 May 9;232(4751):768-72.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3008339" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Carcinoma, Small Cell/metabolism ; Immune Sera/immunology ; Immunoenzyme Techniques ; Leukemia, Myeloid, Acute/metabolism ; Lung Neoplasms/metabolism ; Neoplasm Proteins/genetics/*isolation & purification/physiology ; Neuroblastoma/metabolism ; *Oncogenes ; Proto-Oncogene Proteins/genetics/*isolation & purification/physiology ; Proto-Oncogene Proteins c-myc ; Proto-Oncogenes ; Rabbits/immunology
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  • 7
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    The 35-nucleotide spliced leader sequence is common to all trypanosome messenger RNA's (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-01
    Description: In Trypanosomatidae the messenger RNA's (mRNA's) that code for the variant surface glycoproteins (VSG's), tubulins, calmodulin, and at least a subset of other proteins contain a common 35-nucleotide leader sequence at their 5' ends. Hybrid-arrested in vitro translation has been used to show that all mRNA's in both African and South American trypanosomes contain this 35-nucleotide sequence. Oligonucleotides complementary to this sequence blocked translation of all trypanosome mRNA's in a rabbit reticulocyte lysate system, but did not inhibit translation of mRNA's from other organisms lacking this sequence. An oligonucleotide complementary to the VSG mRNA downstream from the spliced leader sequence arrested only VSG synthesis. Thus, the 35-nucleotide leader sequence is a general feature of all trypanosome mRNA's. The high specificity of oligonucleotides complementary to the spliced leader for their target sequence suggests that analogues permeable to the cell membrane may be useful in the treatment of trypanosomal infections.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walder, J A -- Eder, P S -- Engman, D M -- Brentano, S T -- Walder, R Y -- Knutzon, D S -- Dorfman, D M -- Donelson, J E -- AI-18954/AI/NIAID NIH HHS/ -- AM-25295/AM/NIADDK NIH HHS/ -- HL-33555/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 Aug 1;233(4763):569-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3523758" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Protein Biosynthesis ; Protein Sorting Signals/*genetics ; RNA, Messenger/*genetics ; Trypanosoma/*genetics ; Trypanosoma brucei brucei/genetics ; Trypanosoma cruzi/genetics
    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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  • 8
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    Crystal structure analysis of deamino-oxytocin: conformational flexibility and receptor binding (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-02
    Description: Two crystal structures of deamino-oxytocin have been determined at better than 1.1A resolution from isomorphous replacement and anomalous scattering x-ray measurements. In each of two crystal forms there are two closely related conformers with disulfide bridges of different chirality, which may be important in receptor recognition and activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wood, S P -- Tickle, I J -- Treharne, A M -- Pitts, J E -- Mascarenhas, Y -- Li, J Y -- Husain, J -- Cooper, S -- Blundell, T L -- Hruby, V J -- AM-10080/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1986 May 2;232(4750):633-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3008332" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Dimethyl Sulfoxide ; Hydrogen Bonding ; Magnetic Resonance Spectroscopy ; Models, Molecular ; Oxytocin/*analogs & derivatives/metabolism ; Protein Conformation ; Receptors, Angiotensin/*metabolism ; Receptors, Cell Surface/*metabolism ; Receptors, Oxytocin ; X-Ray Diffraction
    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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  • 9
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    Deletion in cysteine-rich region of LDL receptor impedes transport to cell surface in WHHL rabbit (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-06-06
    Description: The Watanabe heritable hyperlipidemic (WHHL) rabbit, an animal with familial hypercholesterolemia, produces a mutant receptor for plasma low-density lipoprotein (LDL) that is not transported to the cell surface at a normal rate. Cloning and sequencing of complementary DNA's from normal and WHHL rabbits, shows that this defect arises from an in-frame deletion of 12 nucleotides that eliminates four amino acids from the cysteine-rich ligand binding domain of the LDL receptor. A similar mutation, detected by S1 nuclease mapping of LDL receptor messenger RNA, occurred in a patient with familial hypercholesterolemia whose receptor also fails to be transported to the cell surface. These findings suggest that animal cells may have fail-safe mechanisms that prevent the surface expression of improperly folded proteins with unpaired or improperly bonded cysteine residues.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4451858/" 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/PMC4451858/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamamoto, T -- Bishop, R W -- Brown, M S -- Goldstein, J L -- Russell, D W -- HL 01287/HL/NHLBI NIH HHS/ -- HL 20948/HL/NHLBI NIH HHS/ -- HL 31346/HL/NHLBI NIH HHS/ -- P01 HL020948/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1986 Jun 6;232(4755):1230-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3010466" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Biological Transport ; *Chromosome Deletion ; Cloning, Molecular ; Cysteine/genetics ; Dna ; DNA Restriction Enzymes ; Genes ; Humans ; Hyperlipoproteinemia Type II/*genetics ; Mutation ; RNA, Messenger ; Rabbits ; Receptors, LDL/*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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  • 10
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    Activation of mouse T-helper cells induces abundant preproenkephalin mRNA synthesis (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-09
    Description: Antigenic or mitogenic stimulation of T cells induces the secretion of an array of protein hormones that regulate immune responses. Molecular cloning has contributed strongly to our present understanding of the nature of this regulation. A complementary DNA (cDNA) library prepared from a cloned concanavalin A-activated mouse T-helper cell line was screened for abundant and induction-specific cDNA's. One such randomly chosen cDNA was found to encode mouse preproenkephalin messenger RNA (mRNA). Preproenkephalin mRNA represented about 0.4 percent of the mRNA in the activated cell line but was absent in resting cells of this line. Other induced T-helper cell lines have 0.1 to 0.5 percent of their mRNA as preproenkephalin mRNA. Induced T-helper cell culture supernatants have [Met]enkephalin-immunoreactive material. The production by activated T cells of a peptide neurotransmitter identifies a signal that can potentially permit T cells to modulate the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zurawski, G -- Benedik, M -- Kamb, B J -- Abrams, J S -- Zurawski, S M -- Lee, F D -- New York, N.Y. -- Science. 1986 May 9;232(4751):772-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2938259" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cattle ; Cell Line ; Cloning, Molecular ; DNA/genetics ; Enkephalins/*biosynthesis/genetics ; Humans ; *Lymphocyte Activation ; Mice ; Protein Precursors/*biosynthesis/genetics ; RNA, Messenger/*biosynthesis ; Rats ; T-Lymphocytes, Helper-Inducer/drug effects/metabolism/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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