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  • Articles  (10)
  • Structure-Activity Relationship
  • American Association for the Advancement of Science (AAAS)  (10)
  • 1980-1984  (10)
  • 1950-1954
  • 1940-1944
  • 1984  (10)
  • Natural Sciences in General  (10)
Collection
  • Articles  (10)
Source
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (10)
Years
  • 1980-1984  (10)
  • 1950-1954
  • 1940-1944
Year
Journal
Topic
  • 1
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    Inhibition of dihydropteridine reductase by novel 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine analogs (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-04-27
    Description: Hydroxylated derivatives of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), a nigrostriatal neurotoxin in humans and primates, noncompetitively inhibited dihydropteridine reductase from human liver and rat striatal synaptosomes in vitro at micromolar concentrations. In contrast, MPTP and its chloro- and norderivatives did not inhibit this enzyme at lower than millimolar concentrations. Dihydropteridine reductase converts dihydrobiopterin to tetrahydrobiopterin, the required cofactor for the hydroxylation of aromatic amino acids during the synthesis of dopamine and serotonin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abell, C W -- Shen, R S -- Gessner, W -- Brossi, A -- HD 14635/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1984 Apr 27;224(4647):405-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6608790" target="_blank"〉PubMed〈/a〉
    Keywords: 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine ; Animals ; Corpus Striatum/enzymology ; Dihydropteridine Reductase/*antagonists & inhibitors ; Humans ; Hydroxylation ; Liver/enzymology ; NAD/metabolism ; NADH, NADPH Oxidoreductases/*antagonists & inhibitors ; Pyridines/*pharmacology ; Rats ; Structure-Activity Relationship ; Synaptosomes/enzymology
    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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    Nucleotide sequence of a human Blym transforming gene activated in a Burkitt's lymphoma (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-08-03
    Description: The nucleotide sequence of a human Blym-1 transforming gene activated in a Burkitt's lymphoma cell line was determined. This sequence predicts a small protein of 58 amino acids that is 33 percent identical to the predicted product of chicken Blym-1, the activated transforming gene of chicken B cell lymphomas. Both the human and chicken Blym-1 genes exhibit significant identity to an amino-terminal region of transferrins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diamond, A -- Devine, J M -- Cooper, G M -- CA 07250/CA/NCI NIH HHS/ -- CA 28946/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Aug 3;225(4661):516-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6330897" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Burkitt Lymphoma/*genetics ; Cell Line ; *Cell Transformation, Neoplastic ; DNA Restriction Enzymes ; Humans ; *Oncogenes ; Structure-Activity Relationship ; Transcription, Genetic ; Transferrin/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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  • 3
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    Activation of antitumor agent gilvocarcins by visible light (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-01-06
    Description: Gilvocarcins that are antitumor agents are activated by low doses of visible light to induce bacteriophage lambda in Escherichia coli. This result is dependent on interaction with DNA. Gilvocarcin M, an analog without antitumor activity, failed to induce the prophage after light exposure, thus demonstrating a correlation between photosensitizing and antitumor activities. These results raise several possibilities regarding the mode of action of gilvocarcins as antitumor agents in vivo, involving light or enzymatic activating systems, which could be exploited in human cancer therapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Elespuru, R K -- Gonda, S K -- New York, N.Y. -- Science. 1984 Jan 6;223(4631):69-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6229029" target="_blank"〉PubMed〈/a〉
    Keywords: *Aminoglycosides ; *Anti-Bacterial Agents ; Antibiotics, Antineoplastic/*pharmacology/radiation effects ; Bacteriophage lambda/growth & development ; Benzopyrans ; Coumarins ; Glycosides/pharmacology/radiation effects ; *Light ; Methoxsalen/pharmacology ; Structure-Activity Relationship ; Trioxsalen/pharmacology ; Ultraviolet Rays ; Virus Activation/*drug effects
    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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    Amphiphilic secondary structure: design of peptide hormones (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-01-20
    Description: Peptide synthesis can be used for elucidating the roles of secondary structures in the specificity of hormones, antigens, and toxins. Intermediate sized peptides with these activities assume amphiphilic secondary structures in the presence of membranes. When models are designed to optimize the amphiphilicity of the secondary structure, stronger interactions can be observed with the synthetic peptides than with the naturally occurring analogs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaiser, E T -- Kezdy, F J -- HL-18577/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1984 Jan 20;223(4633):249-55.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6322295" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Apolipoprotein A-I ; Apolipoproteins ; Binding Sites ; Calcitonin ; Chemical Phenomena ; Chemistry ; Corticotropin-Releasing Hormone ; Endorphins ; Glucagon ; Growth Hormone-Releasing Hormone ; *Hormones/pharmacology ; Lipoproteins, HDL ; Melitten ; Models, Structural ; *Peptides/chemical synthesis/metabolism/pharmacology ; Protein Conformation ; Structure-Activity Relationship ; beta-Endorphin
    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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    A model study of fecapentaenes: mutagens of bacterial origin with alkylating properties (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-08-03
    Description: Fecapentaene-14 and -12 are directly acting mutagens that do not require metabolic activation. Their unusual structure suggests a possible mechanism of action. A carbocation that is formed by the addition of an electrophilic species (such as a proton) to the enol ether is most probably the reactive species. A series of model enol ethers with conjugated systems of various lengths was prepared, and a correlation between mutagenicity and increasing reactivity of derived carbocations was found. The glycerol moiety does not play a crucial role in the overall reactivity of the fecapentaenes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gupta, I -- Suzuki, K -- Bruce, R W -- Krepinsky, J J -- Yates, P -- New York, N.Y. -- Science. 1984 Aug 3;225(4661):521-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6377497" target="_blank"〉PubMed〈/a〉
    Keywords: *Alkylating Agents ; Mutagenicity Tests ; Mutagens/*toxicity ; *Mutation ; Polyenes/toxicity ; Salmonella typhimurium/drug effects ; Structure-Activity Relationship
    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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    Inhibitors of poly(adenosine diphosphate-ribose) synthesis: effect on other metabolic processes (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-02-10
    Description: 3-Aminobenzamide and benzamide, purported to be specific inhibitors of the synthesis of poly(adenosine diphosphate-ribose), were used to elucidate possible functions of this biopolymer. These compounds, at frequently used experimental concentrations, not only inhibited the action of poly(adenosine diphosphate-ribose) synthetase but also affected cell viability, glucose metabolism, and DNA synthesis. Thus, the usefulness of 3-aminobenzamide and benzamide may be severely restricted by the difficulty of finding a dose small enough to inhibit the synthetase without producing additional metabolic effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Milam, K M -- Cleaver, J E -- New York, N.Y. -- Science. 1984 Feb 10;223(4636):589-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6420886" target="_blank"〉PubMed〈/a〉
    Keywords: Benzamides/*toxicity ; Cell Line ; DNA Replication/drug effects ; Humans ; Kinetics ; Lymphocytes ; Nucleoside Diphosphate Sugars/*biosynthesis ; Poly Adenosine Diphosphate Ribose/*biosynthesis ; Poly(ADP-ribose) Polymerases/metabolism ; Structure-Activity Relationship
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Rat transforming growth factor type 1: structure and relation to epidermal growth factor (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-03-09
    Description: The complete amino acid sequence of rat transforming growth factor type 1 has been determined. This growth factor, obtained from retrovirus-transformed fibroblasts, is structurally and functionally related to mouse epidermal growth factor and human urogastrone. Production of this polypeptide by various neoplastic cells might contribute to the continued expression of the transformed phenotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marquardt, H -- Hunkapiller, M W -- Hood, L E -- Todaro, G J -- New York, N.Y. -- Science. 1984 Mar 9;223(4640):1079-82.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6320373" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Line ; *Cell Transformation, Neoplastic ; DNA/biosynthesis ; Epidermal Growth Factor/*metabolism/pharmacology ; Humans ; Idoxuridine/metabolism ; Mice ; Peptide Biosynthesis ; Peptides/*metabolism/pharmacology ; Rats ; Receptor, Epidermal Growth Factor ; Receptors, Cell Surface/metabolism ; Structure-Activity Relationship ; Transforming Growth Factors
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  • 8
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    Need a catalyst? Design an enzyme (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-01-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maugh, T H 2nd -- New York, N.Y. -- Science. 1984 Jan 20;223(4633):269-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6608147" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Biochemistry/*methods ; Catalysis ; *Cloning, Molecular ; Enzymes/genetics/*metabolism ; Mutation ; Structure-Activity Relationship ; Substrate Specificity ; Tetrahydrofolate Dehydrogenase/metabolism ; Tyrosine-tRNA Ligase/metabolism ; beta-Lactamases/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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  • 9
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    Site-specific mutagenesis of the human interleukin-2 gene: structure-function analysis of the cysteine residues (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-06-29
    Description: The gene encoding human interleukin-2 (IL-2) has been cloned from human spleen cells, peripheral blood lymphocytes, and the Jurkat cell line. Nucleotide sequence analysis of the gene revealed that the encoded IL-2 protein has three cysteines located at amino acid residues 58, 105, and 125 of the mature protein. Site-specific mutagenesis procedures were used to modify the IL-2 gene by changing each of the cysteine codons individually to serine codons. Substitution of serine for cysteine residues at either position 58 or 105 of the IL-2 protein substantially reduced biological activity, indicating that the cysteines at these positions are necessary for maintenance of the biologically active conformation and may therefore be linked by a disulfide bridge. The modified IL-2 protein containing a substitution at position 125 retained full biological activity, suggesting that the cysteine at this position is not involved in a disulfide bond and that a free sulfhydryl group at that position is not necessary for receptor binding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, A -- Lu, S D -- Mark, D F -- New York, N.Y. -- Science. 1984 Jun 29;224(4656):1431-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6427925" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Cell Line ; Cysteine/metabolism ; DNA, Recombinant/metabolism ; Escherichia coli/genetics ; Genes ; Humans ; Interleukin-2/*genetics ; *Mutation ; Receptors, Immunologic/metabolism ; Receptors, Interleukin-2 ; Serine/metabolism ; Structure-Activity Relationship
    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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    A conformationally constrained vasopressin analog with antidiuretic antagonistic activity (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-10-26
    Description: Application of information derived from a three-dimensional model of vasopressin bound to its antidiuretic receptor resulted in the design and synthesis of a bicyclic vasopressin analog, [5,8-cyclo(1-beta-mercaptopropionic acid,2-phenylalanine,5-aspartic acid,8-lysine)]vasopressin. The analog acts as an antagonist of the antidiuretic activity of vasopressin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Skala, G -- Smith, C W -- Taylor, C J -- Ludens, J H -- New York, N.Y. -- Science. 1984 Oct 26;226(4673):443-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6541806" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arginine Vasopressin/*analogs & derivatives ; Lypressin/*analogs & derivatives ; Male ; Rats ; Rats, Inbred Strains ; Structure-Activity Relationship
    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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