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  • Articles  (1,074)
  • Base Sequence  (704)
  • Rats  (355)
  • Signal Transduction
  • American Association for the Advancement of Science (AAAS)  (1,074)
  • American Institute of Physics (AIP)
  • 1990-1994  (1,074)
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  • Articles  (1,074)
Keywords
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  • American Association for the Advancement of Science (AAAS)  (1,074)
  • American Institute of Physics (AIP)
  • Springer  (11)
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Year
  • 1
    Publication Date: 1990-10-12
    Description: The mechanism by which phytohormones, like abscisic acid (ABA), regulate gene expression is unknown. An activity in nuclear extracts that interacts with the ABA response element (ABRE) from the 5' regulatory region of the wheat Em gene was identified. A complementary DNA clone was isolated whose product is a DNA binding protein (EmBP-1) that interacts specifically with an 8-base pair (bp) sequence (CACGTGGC) in the ABRE. A 2-bp mutation in this sequence prevented binding of EmBP-1. The same mutation reduced the ability of the ABRE to confer ABA responsiveness on a viral promoter in a transient assay. The 8-bp EmBP-1 target sequence was found to be conserved in several other ABA-responsive promoters and in promoters from plants that respond to signals other than ABA. Similar sequences are found in promoters from mammals, yeast, and in the major late promoter of adenovirus. The deduced amino acid sequence of EmBP-1 contains conserved basic and leucine zipper domains found in transcription factors in plants, yeast, and mammals. EmBP-1 may be a member of a highly conserved family of proteins that recognize a core sequence found in the regulatory regions of various genes that are integrated into a number of different response pathways.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guiltinan, M J -- Marcotte, W R Jr -- Quatrano, R S -- New York, N.Y. -- Science. 1990 Oct 12;250(4978):267-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of North Carolina, Chapel Hill 27599-3280.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2145628" target="_blank"〉PubMed〈/a〉
    Keywords: Abscisic Acid/*metabolism ; Amino Acid Sequence ; Base Sequence ; Cell Nucleus/metabolism ; DNA/*genetics ; DNA-Binding Proteins/genetics/metabolism ; *Gene Expression Regulation ; *Leucine Zippers/genetics ; Molecular Sequence Data ; Oligonucleotide Probes ; Plants/*genetics ; Sequence Homology, Nucleic Acid ; Triticum/*genetics/metabolism
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1990-02-02
    Description: The RNA moiety of the ribonucleoprotein enzyme telomerase from the ciliate Euplotes crassus was identified and its gene was sequenced. Functional analysis, in which oligonucleotides complementary to portions of the telomerase RNA were tested for their ability to prime telomerase in vitro, showed that the sequence 5' CAAAACCCCAAA 3' in this RNA is the template for synthesis of telomeric TTTTGGGG repeats by the Euplotes telomerase. The data provide a direct demonstration of a template function for a telomerase RNA and demarcate the outer boundaries of the telomeric template. Telomerase can now be defined as a specialized reverse transcriptase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shippen-Lentz, D -- Blackburn, E H -- New York, N.Y. -- Science. 1990 Feb 2;247(4942):546-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1689074" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Ciliophora/enzymology/*genetics ; DNA Nucleotidylexotransferase/*genetics ; Genes ; Molecular Sequence Data ; Oligonucleotide Probes ; RNA/*genetics ; Sequence Homology, Nucleic Acid ; *Templates, Genetic
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  • 3
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1990-04-06
    Description: The rate of release of guanine nucleotides from the ras proteins (Ras) is extremely slow in the presence of Mg2+. It seemed likely, therefore that a factor might exist to accelerate the release of guanosine diphosphate (GDP), and hence the exchange of GDP for guanosine triphosphate (GTP). Such a factor has now been discovered in rat brain cytosol. Brain cytosol was found to catalyze, by orders of magnitude, the release of guanine nucleotides from recombinant v-H-Ras protein bound with [alpha-32P]GDP. This effect occurred even in the presence of a large excess of Mg2+, but was destroyed by heat or by incubation of the cytosol for an hour at 37 degrees C in the absence of phosphatase inhibitors. The effect was observed with either v-H-Ras or c-H-Ras, but not with p25rab3A, a small G protein with about 30% similarity to Ras. The effect could not be mimicked by addition of recombinant Ras-GAP or purified GEF, a guanine nucleotide exchange factor involved in the regulation of eukaryotic protein synthesis. By gel filtration chromatography, the factor appears to possess a molecular size between 100,000 and 160,000 daltons. This protein (Ras-guanine nucleotide-releasing factor, or Ras-GRF) may be involved in the activation of p21ras.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolfman, A -- Macara, I G -- CA 43551/CA/NCI NIH HHS/ -- ES 01247/ES/NIEHS NIH HHS/ -- GM 41220/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1990 Apr 6;248(4951):67-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biophysics, University of Rochester Medical Center, NY 14642.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2181667" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding, Competitive ; Brain/metabolism ; Cholic Acids ; Cytosol/*metabolism ; Guanine Nucleotides/*metabolism ; Guanosine 5'-O-(3-Thiotriphosphate) ; Guanosine Diphosphate/*metabolism ; Guanosine Triphosphate/analogs & derivatives/metabolism ; Hot Temperature ; Immunosorbent Techniques ; Kinetics ; Magnesium Chloride/pharmacology ; Molecular Weight ; Proto-Oncogene Proteins/*metabolism ; Proto-Oncogene Proteins p21(ras) ; Rats ; Thionucleotides/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1990-09-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Skerrett, P J -- New York, N.Y. -- Science. 1990 Sep 14;249(4974):1248.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2119053" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Diabetes Mellitus, Experimental/*surgery ; Graft Enhancement, Immunologic ; Immune Tolerance ; *Islets of Langerhans Transplantation ; Rats ; T-Lymphocytes/immunology ; Thymus Gland/surgery ; Transplantation, Heterotopic
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  • 5
    Publication Date: 1990-07-06
    Description: Oligonucleotides equipped with EDTA-Fe can bind specifically to duplex DNA by triple-helix formation and produce double-strand cleavage at binding sites greater than 12 base pairs in size. To demonstrate that oligonucleotide-directed triple-helix formation is a viable chemical approach for the site-specific cleavage of large genomic DNA, an oligonucleotide with EDTA-Fe at the 5' and 3' ends was targeted to a 20-base pair sequence in the 340-kilobase pair chromosome III of Saccharomyces cerevisiae. Double-strand cleavage products of the correct size and location were observed, indicating that the oligonucleotide bound and cleaved the target site among almost 14 megabase pairs of DNA. Because oligonucleotide-directed triple-helix formation has the potential to be a general solution for DNA recognition, this result has implications for physical mapping of chromosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strobel, S A -- Dervan, P B -- GM 42966/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1990 Jul 6;249(4964):73-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena 91125.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2195655" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; Chromosomes, Fungal/*metabolism ; DNA, Fungal/*genetics/metabolism ; Densitometry ; Hydrogen-Ion Concentration ; Molecular Sequence Data ; Nucleic Acid Conformation ; Nucleic Acid Hybridization ; Oligonucleotides/*genetics/metabolism ; Saccharomyces cerevisiae/*genetics
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  • 6
    Publication Date: 1990-08-31
    Description: The protein encoded by the wild-type p53 proto-oncogene has been shown to suppress transformation, whereas certain mutations that alter p53 become transformation competent. Fusion proteins between p53 and the GAL4 DNA binding domain were made to anchor p53 to a DNA target sequence and to allow measurement of transcriptional activation of a reporter plasmid. The wild-type p53 stimulated transcription in this assay, but two transforming mutations in p53 were unable to act as transcriptional activators. Therefore, p53 can activate transcription, and transformation-activating mutations result in a loss of function of the p53 protein. The inability of the p53 mutant proteins to activate transcription may enable them to be transformation competent.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2935288/" 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/PMC2935288/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Raycroft, L -- Wu, H Y -- Lozano, G -- CA16672/CA/NCI NIH HHS/ -- CA47296/CA/NCI NIH HHS/ -- R01 CA047296/CA/NCI NIH HHS/ -- R01 CA047296-12/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1990 Aug 31;249(4972):1049-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Texas, M. D. Anderson Cancer Center, Department of Molecular Genetics, Houston 77030.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2144364" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; *Cell Transformation, Neoplastic ; *Gene Expression Regulation ; HeLa Cells/metabolism ; Humans ; Molecular Sequence Data ; *Mutation ; Nuclear Proteins/genetics ; Oligonucleotide Probes ; Oncogene Proteins/*genetics ; Phosphoproteins/*genetics ; *Proto-Oncogenes ; RNA, Messenger/genetics ; Suppression, Genetic ; Transcription Factors/*genetics ; *Transcription, Genetic ; Tumor Suppressor Protein p53
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  • 7
    Publication Date: 1990-01-12
    Description: The murine white spotting locus (W) is allelic with the proto-oncogene c-kit, which encodes a transmembrane tyrosine protein kinase receptor for an unknown ligand. Mutations at the W locus affect various aspects of hematopoiesis and the proliferation and migration of primordial germ cells and melanoblasts during development to varying degrees of severity. The W42 mutation has a particularly severe effect in both the homozygous and the heterozygous states. The molecular basis of the W42 mutation was determined. The c-kit protein products in homozygous mutant mast cells were expressed normally but displayed a defective tyrosine kinase activity in vitro. Nucleotide sequence analysis of mutant complementary DNAs revealed a missense mutation that replaces aspartic acid with asparagine at position 790 in the c-kit protein product. Aspartic acid-790 is a conserved residue in all protein kinases. These results provide an explanation for the dominant nature of the W42 mutation and provide insight into the mechanism of c-kit-mediated signal transduction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tan, J C -- Nocka, K -- Ray, P -- Traktman, P -- Besmer, P -- P01-CA-16599/CA/NCI NIH HHS/ -- R01-CA-32926/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1990 Jan 12;247(4939):209-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Biology Program, Sloan Kettering Institute, New York, NY 10021.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1688471" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cells, Cultured ; DNA/genetics ; Gene Expression ; Homozygote ; Liver/analysis/cytology/embryology ; Mast Cells/metabolism ; Mice ; Molecular Sequence Data ; *Mutation ; *Phenotype ; Polymerase Chain Reaction ; Protein-Tyrosine Kinases/*genetics ; Proto-Oncogene Proteins/*genetics ; Proto-Oncogene Proteins c-kit ; RNA/analysis ; Receptors, Cell Surface/genetics ; Signal Transduction
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  • 8
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1990-04-27
    Description: Light-dependent expression of rbcS, the gene encoding the small subunit of ribulose-1,5-bisphosphate carboxylase, which is the key enzyme involved in carbon fixation in higher plants, is regulated at the transcriptional level. Sequence analysis of the gene has uncovered a conserved GT motif in the -150 to -100 region of many rbcS promoters. This motif serves as the binding site of a nuclear factor, designated GT-1. Analysis of site-specific mutants of pea rbcS-3A promoter demonstrated that GT-1 binding in vitro is correlated with light-responsive expression of the rbcS promoter in transgenic plants. However, it is not known whether factors other than GT-1 might also be required for activation of transcription by light. A synthetic tetramer of box II (TGTGTGGTTAATATG), the GT-1 binding site located between -152 to -138 of the rbcS-3A promoter, inserted upstream of a truncated cauliflower mosaic virus 35S promoter is sufficient to confer expression in leaves of transgenic tobacco. This expression occurs principally in chloroplast-containing cells, is induced by light, and is correlated with the ability of box II to bind GT-1 in vitro. The data show that the binding site for GT-1 is likely to be a part of the molecular light switch for rbcS activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lam, E -- Chua, N H -- New York, N.Y. -- Science. 1990 Apr 27;248(4954):471-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Plant Molecular Biology, Rockefeller University, New York, NY 10021.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2330508" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; Chloramphenicol O-Acetyltransferase/genetics ; Cloning, Molecular ; DNA-Binding Proteins/*metabolism ; Gene Expression Regulation/*physiology ; Genetic Vectors ; *Light ; Molecular Sequence Data ; Mutation ; Nuclear Proteins/*metabolism ; Plant Proteins/*metabolism ; *Plants, Toxic ; Promoter Regions, Genetic/genetics ; Ribulose-Bisphosphate Carboxylase/*genetics ; Tobacco/enzymology/*genetics ; Transcription, Genetic/radiation effects ; Transformation, Genetic
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  • 9
    Publication Date: 1990-03-09
    Description: An antibody to a platelet integral membrane glycoprotein was found to cross-react with the previously identified CD31 myelomonocytic differentiation antigen and with hec7, an endothelial cell protein that is enriched at intercellular junctions. This antibody identified a complementary DNA clone from an endothelial cell library. The 130-kilodalton translated sequence contained six extracellular immunoglobulin (Ig)-like domains and was most similar to the cell adhesion molecule (CAM) subgroup of the Ig superfamily. This is the only known member of the CAM family on platelets. Its cell surface distribution suggests participation in cellular recognition events.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Newman, P J -- Berndt, M C -- Gorski, J -- White, G C 2nd -- Lyman, S -- Paddock, C -- Muller, W A -- HL-40926/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1990 Mar 9;247(4947):1219-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Blood Center of Southeastern Wisconsin, Milwaukee 53233.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1690453" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antibodies, Monoclonal ; Antigens, CD31 ; Antigens, Differentiation, Myelomonocytic/*genetics ; Cell Adhesion Molecules/*genetics ; *Cloning, Molecular ; DNA/analysis ; Endothelium, Vascular/analysis/immunology ; Epitopes/immunology ; *Genes, Immunoglobulin ; Humans ; Immunoblotting ; Immunoglobulins ; Immunosorbent Techniques ; Molecular Sequence Data ; Platelet Membrane Glycoproteins/immunology ; Protein Conformation ; Repetitive Sequences, Nucleic Acid ; Sequence Homology, Nucleic Acid ; Signal Transduction
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  • 10
    Publication Date: 1990-07-13
    Description: The heterotrimeric guanine nucleotide-binding regulatory proteins act at the inner surface of the plasma membrane to relay information from cell surface receptors to effectors inside the cell. These G proteins are not integral membrane proteins, yet are membrane associated. The processing and function of the gamma subunit of the yeast G protein involved in mating-pheromone signal transduction was found to be affected by the same mutations that block ras processing. The nature of these mutations implied that the gamma subunit was polyisoprenylated and that this modification was necessary for membrane association and biological activity. A microbial screen was developed for pharmacological agents that inhibit polyisoprenylation and that have potential application in cancer therapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finegold, A A -- Schafer, W R -- Rine, J -- Whiteway, M -- Tamanoi, F -- CA 41996/CA/NCI NIH HHS/ -- GM 07183/GM/NIGMS NIH HHS/ -- GM 35827/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1990 Jul 13;249(4965):165-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1695391" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cell Membrane/metabolism ; Cloning, Molecular ; Epitopes/genetics ; GTP-Binding Proteins/genetics/*metabolism ; Hemagglutinins, Viral/immunology ; Lovastatin/pharmacology ; Mevalonic Acid/pharmacology ; Molecular Sequence Data ; Mutation ; Oncogene Protein p21(ras)/genetics/*metabolism ; Orthomyxoviridae/immunology ; Protein Processing, Post-Translational ; Saccharomyces cerevisiae/*genetics/metabolism ; Signal Transduction ; Suppression, Genetic
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