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  • 1
    Publication Date: 1990-01-26
    Description: A synthetic peptidemimetic substrate of the human immunodeficiency virus 1 (HIV-1) protease with a nonhydrolyzable pseudodipeptidyl insert at the protease cleavage site was prepared. The peptide U-81749 inhibited recombinant HIV-1 protease in vitro (inhibition constant Ki of 70 nanomolar) and HIV-1 replication in human peripheral blood lymphocytes (inhibitory concentration IC50 of 0.1 to 1 micromolar). Moreover, 10 micromolar concentrations of U-81749 significantly inhibited proteolysis of the HIV-1 gag polyprotein (p55) to the mature viral structural proteins p24 and p17 in cells infected with a recombinant vaccinia virus expressing the HIV-1 gag-pol genes. The HIV-1 like particles released from inhibitor-treated cells contained almost exclusively p55 and other gag precursors, but not p24. Incubation of HIV-like particles recovered from drug-treated cultures in drug-free medium indicated that inhibition of p55 proteolysis was at least partially reversible, suggesting that U-81749 was present within the particles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McQuade, T J -- Tomasselli, A G -- Liu, L -- Karacostas, V -- Moss, B -- Sawyer, T K -- Heinrikson, R L -- Tarpley, W G -- New York, N.Y. -- Science. 1990 Jan 26;247(4941):454-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Infectious Disease Research Unit, Upjohn Company, Kalamazoo, MI 49001.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2405486" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antiviral Agents/*pharmacology ; DNA, Viral/genetics ; Endopeptidases/*metabolism ; Fusion Proteins, gag-pol/genetics/metabolism ; Gene Products, gag/metabolism ; HIV Protease ; HIV-1/*drug effects/genetics/physiology ; Humans ; Lymphocytes/microbiology ; Molecular Sequence Data ; Molecular Structure ; Oligopeptides/*pharmacology ; Protease Inhibitors/*pharmacology ; Protein Precursors/metabolism ; RNA, Viral/metabolism ; Transfection ; Virus Replication/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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  • 2
    Publication Date: 1992-03-20
    Description: The highly symmetric pyruvate dehydrogenase multienzyme complexes have molecular masses ranging from 5 to 10 million daltons. They consist of numerous copies of three different enzymes: pyruvate dehydrogenase, dihydrolipoyl transacetylase, and lipoamide dehydrogenase. The three-dimensional crystal structure of the catalytic domain of Azotobacter vinelandii dihydrolipoyl transacetylase has been determined at 2.6 angstrom (A) resolution. Eight trimers assemble as a hollow truncated cube with an edge of 125 A, forming the core of the multienzyme complex. Coenzyme A must enter the 29 A long active site channel from the inside of the cube, and lipoamide must enter from the outside. The trimer of the catalytic domain of dihydrolipoyl transacetylase has a topology identical to chloramphenicol acetyl transferase. The atomic structure of the 24-subunit cube core provides a framework for understanding all pyruvate dehydrogenase and related multienzyme complexes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mattevi, A -- Obmolova, G -- Schulze, E -- Kalk, K H -- Westphal, A H -- de Kok, A -- Hol, W G -- New York, N.Y. -- Science. 1992 Mar 20;255(5051):1544-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, University of Groningen, The Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1549782" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Azotobacter vinelandii/enzymology ; Chloramphenicol O-Acetyltransferase/genetics ; Humans ; Models, Molecular ; Molecular Sequence Data ; Molecular Structure ; Pyruvate Dehydrogenase Complex/*chemistry/genetics ; Sequence Homology, 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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  • 3
    Publication Date: 1990-07-13
    Description: Human neutrophils can initiate the rapid degradation of extracellular matrix macromolecules by localizing the destructive process to sites of cell-substrate contact. Although plasma and its filtrates contain multiple proteinase inhibitors, these inhibitors did not prevent neutrophils from attacking either underlying fibronectin or elastin. However, subjacent substrates could be protected from neutrophils by recombinant secretory leukoprotease inhibitor, a structurally unique serine proteinase inhibitor whose natural counterpart is normally confined to human mucous secretions. The identification of this extravascular proteinase inhibitor as a potent regulator of subjacent proteolysis could lead to the development of a new class of anti-inflammatory therapeutics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rice, W G -- Weiss, S J -- AI 21301/AI/NIAID NIH HHS/ -- HL 28024/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1990 Jul 13;249(4965):178-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, Simpson Memorial Research Institute, University of Michigan, Ann Arbor 48109.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2371565" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Adhesion ; Cells, Cultured ; Elastin/metabolism ; Extracellular Matrix/*metabolism ; Fibronectins/metabolism ; Humans ; Neutrophils/*metabolism ; Proteinase Inhibitory Proteins, Secretory ; *Proteins ; Recombinant Proteins/metabolism ; Serine Proteinase Inhibitors/*metabolism ; Solubility
    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
    Publication Date: 1991-11-22
    Description: A technique called optical coherence tomography (OCT) has been developed for noninvasive cross-sectional imaging in biological systems. OCT uses low-coherence interferometry to produce a two-dimensional image of optical scattering from internal tissue microstructures in a way that is analogous to ultrasonic pulse-echo imaging. OCT has longitudinal and lateral spatial resolutions of a few micrometers and can detect reflected signals as small as approximately 10(-10) of the incident optical power. Tomographic imaging is demonstrated in vitro in the peripapillary area of the retina and in the coronary artery, two clinically relevant examples that are representative of transparent and turbid media, respectively.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4638169/" 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/PMC4638169/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, D -- Swanson, E A -- Lin, C P -- Schuman, J S -- Stinson, W G -- Chang, W -- Hee, M R -- Flotte, T -- Gregory, K -- Puliafito, C A -- 1-R01-GM35459-06/GM/NIGMS NIH HHS/ -- R01 GM035459/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1991 Nov 22;254(5035):1178-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge 02139.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1957169" target="_blank"〉PubMed〈/a〉
    Keywords: Coronary Disease/diagnosis ; Coronary Vessels/pathology ; Humans ; Image Processing, Computer-Assisted ; In Vitro Techniques ; Retinal Diseases/diagnosis/pathology ; Tomography/*methods
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 1994-05-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Broder, C C -- Nussbaum, O -- Gutheil, W G -- Bachovchin, W W -- Berger, E A -- New York, N.Y. -- Science. 1994 May 20;264(5162):1156-9; author reply 1162-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7909959" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD4/*physiology ; Antigens, Differentiation, T-Lymphocyte/*physiology ; Base Sequence ; *Cell Fusion ; Cell Line ; Dipeptidyl Peptidase 4 ; Gene Products, env/*physiology ; Giant Cells/physiology ; HIV-1/*physiology ; Humans ; Hybrid Cells ; Molecular Sequence Data
    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
    Publication Date: 1993-05-28
    Description: The retinoblastoma gene product (Rb) is a nuclear phosphoprotein that regulates cell cycle progression. Elf-1 is a lymphoid-specific Ets transcription factor that regulates inducible gene expression during T cell activation. In this report, it is demonstrated that Elf-1 contains a sequence motif that is highly related to the Rb binding sites of several viral oncoproteins and binds to the pocket region of Rb both in vitro and in vivo. Elf-1 binds exclusively to the underphosphorylated form of Rb and fails to bind to Rb mutants derived from patients with retinoblastoma. Co-immunoprecipitation experiments demonstrated an association between Elf-1 and Rb in resting normal human T cells. After T cell activation, the phosphorylation of Rb results in the release of Elf-1, which is correlated temporally with the activation of Elf-1-mediated transcription. Overexpression of a phosphorylation-defective form of Rb inhibited Elf-1-dependent transcription during T cell activation. These results demonstrate that Rb interacts specifically with a lineage-restricted Ets transcription factor. This regulated interaction may be important for the coordination of lineage-specific effector functions such as lymphokine production with cell cycle progression in activated T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, C Y -- Petryniak, B -- Thompson, C B -- Kaelin, W G -- Leiden, J M -- R01 AI29673-01/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1993 May 28;260(5112):1330-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of Chicago, IL 60637.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8493578" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Binding Sites ; Cell Cycle ; Cell Line ; DNA-Binding Proteins/chemistry/*metabolism ; Eye Neoplasms/genetics ; Humans ; Lymphocyte Activation ; Molecular Sequence Data ; Mutation ; Oligodeoxyribonucleotides ; Phosphorylation ; Recombinant Fusion Proteins/metabolism ; Retinoblastoma/genetics ; Retinoblastoma Protein/*metabolism ; T-Lymphocytes/immunology/*metabolism ; Transcription Factors/chemistry/*metabolism ; Transcription, Genetic
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 1990-09-21
    Description: The primary structure of lipopolysaccharide binding protein (LBP), a trace plasma protein that binds to the lipid A moiety of bacterial lipopolysaccharides (LPSs), was deduced by sequencing cloned complementary DNA. LBP shares sequence identity with another LPS binding protein found in granulocytes, bactericidal/permeability-increasing protein, and with cholesterol ester transport protein of the plasma. LBP may control the response to LPS under physiologic conditions by forming high-affinity complexes with LPS that bind to monocytes and macrophages, which then secrete tumor necrosis factor. The identification of this pathway for LPS-induced monocyte stimulation may aid in the development of treatments for diseases in which Gram-negative sepsis or endotoxemia are involved.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schumann, R R -- Leong, S R -- Flaggs, G W -- Gray, P W -- Wright, S D -- Mathison, J C -- Tobias, P S -- Ulevitch, R J -- AI 15136/AI/NIAID NIH HHS/ -- AI 25563/AI/NIAID NIH HHS/ -- GM 28485/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1990 Sep 21;249(4975):1429-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Research Institute of Scripps Clinic, La Jolla, CA 92037.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2402637" target="_blank"〉PubMed〈/a〉
    Keywords: *Acute-Phase Proteins ; Amino Acid Sequence ; Animals ; Base Sequence ; Blood Proteins/*genetics ; Carrier Proteins/*genetics/metabolism ; Gene Library ; Humans ; Kinetics ; Lipid A/metabolism ; Lipopolysaccharides/*metabolism/pharmacology ; Male ; *Membrane Glycoproteins ; Molecular Sequence Data ; Oligonucleotide Probes ; Rabbits ; Sequence Homology, Nucleic Acid ; Sheep ; Staphylococcus aureus ; Tumor Necrosis Factor-alpha/biosynthesis
    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
    Publication Date: 1993-08-13
    Description: The apolipoprotein E type 4 allele (APOE-epsilon 4) is genetically associated with the common late onset familial and sporadic forms of Alzheimer's disease (AD). Risk for AD increased from 20% to 90% and mean age at onset decreased from 84 to 68 years with increasing number of APOE-epsilon 4 alleles in 42 families with late onset AD. Thus APOE-epsilon 4 gene dose is a major risk factor for late onset AD and, in these families, homozygosity for APOE-epsilon 4 was virtually sufficient to cause AD by age 80.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Corder, E H -- Saunders, A M -- Strittmatter, W J -- Schmechel, D E -- Gaskell, P C -- Small, G W -- Roses, A D -- Haines, J L -- Pericak-Vance, M A -- New York, N.Y. -- Science. 1993 Aug 13;261(5123):921-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Joseph and Kathleen Bryan Alzheimer's Disease Research Center, Duke University Medical Center, Durham, NC 27710.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8346443" target="_blank"〉PubMed〈/a〉
    Keywords: Aged ; Aged, 80 and over ; Aging ; *Alleles ; Alzheimer Disease/*genetics/metabolism/mortality ; Amyloid beta-Peptides/metabolism ; Apolipoprotein E4 ; Apolipoproteins E/*genetics/physiology ; Female ; *Gene Frequency ; Genotype ; Homozygote ; Humans ; Linkage Disequilibrium ; Male ; Risk Factors ; Survival Rate
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  • 9
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-11-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Portier, C J -- Lucier, G W -- Edler, L -- New York, N.Y. -- Science. 1994 Nov 18;266(5188):1141-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973685" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carcinogenicity Tests/*statistics & numerical data ; Carcinogens/*administration & dosage/toxicity ; DNA Damage ; Dose-Response Relationship, Drug ; Environmental Exposure ; Humans ; Neoplasms/*chemically induced ; Risk Assessment ; Tetrachlorodibenzodioxin/adverse effects ; United States ; United States Environmental Protection Agency
    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
    Publication Date: 1994-10-07
    Description: In this study, a protein that interacts with sequences encoded by the first exon of the protein kinase Bcr was cloned. The Bcr-associated protein 1 (Bap-1) is a member of the 14-3-3 family of proteins. Bap-1 interacts with full-length c-Bcr and with the chimeric Bcr-Abl tyrosine kinase of Philadelphia chromosome (Ph1)-positive human leukemias. Bap-1 is a substrate for the Bcr serine-threonine kinase and is also phosphorylated on tyrosine by Bcr-Abl but not by c-Abl. Bap-1 may function in the regulation of c-Bcr and may contribute to the transforming activity of Bcr-Abl in vivo. 14-3-3 proteins are essential for cell proliferation and have a role in determining the timing of mitosis in yeast. Through direct binding to sequences present in Bcr and in other proteins implicated in signaling, the mammalian 14-3-3 proteins may link specific signaling protein components to mitogenic and cell-cycle control pathways.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reuther, G W -- Fu, H -- Cripe, L D -- Collier, R J -- Pendergast, A M -- CA61033/CA/NCI NIH HHS/ -- DK01965/DK/NIDDK NIH HHS/ -- GM07184/GM/NIGMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1994 Oct 7;266(5182):129-33.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Duke University Medical Center, Durham, NC 27710.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7939633" target="_blank"〉PubMed〈/a〉
    Keywords: 14-3-3 Proteins ; Animals ; Cell Division ; Cell Line ; Cell Transformation, Neoplastic ; Fusion Proteins, bcr-abl/*metabolism ; Humans ; Mice ; Phosphorylation ; Poly(ADP-ribose) Polymerases/metabolism ; Protein-Tyrosine Kinases/*metabolism ; Proteins/isolation & purification/*metabolism ; Proto-Oncogene Proteins/*metabolism ; Proto-Oncogene Proteins c-bcr ; Rats ; Recombinant Fusion Proteins/metabolism ; *Signal Transduction ; *Tyrosine 3-Monooxygenase
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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