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palmitic acid/sarcoma
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10 resultats
Direct identification of palmitic acid as the lipid attached to p21ras.
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p21v-H-ras, the transforming protein of Harvey murine sarcoma virus, contains a covalently attached lipid. Using thin-layer chromatography, we identified the acyl group as the 16-carbon saturated fatty acid palmitic acid. No myristic acid was detected in fatty acids released from in vivo-labeled
Amino-terminal deletion mutants of the Rous sarcoma virus glycoprotein do not block signal peptide cleavage but can block intracellular transport.
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Protein sequence requirements for cleavage of the signal peptide from the Rous sarcoma virus glycoprotein have been investigated through the use of deletion mutagenesis. The phenotypes of these mutants have been characterized by expression of the cloned, mutated env genes in CV-1 cells using a late
Palmitoylation of the Rous sarcoma virus transmembrane glycoprotein is required for protein stability and virus infectivity.
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The Rous sarcoma virus (RSV) transmembrane (TM) glycoprotein is modified by the addition of palmitic acid. To identify whether conserved cysteines within the hydrophobic anchor region are the site(s) of palmitoylation, and to determine the role of acylation in glycoprotein function, cysteines at
Myristic acid, a rare fatty acid, is the lipid attached to the transforming protein of Rous sarcoma virus and its cellular homolog.
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The lipid bound to p60src, the transforming protein of Rous sarcoma virus, has been identified by gas and thin-layer chromatography as the 14-carbon saturated fatty acid, myristic acid. The protein can be labeled biosynthetically with either [3H]myristic acid or [3H]palmitic acid. Incorporation of
Biological and biochemical characterization of a new isolate of feline sarcoma virus: Theilen-Pedersen (TP1-FeSV).
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A new feline sarcoma virus designated Theilen-Pedersen (TP1-FeSV) has been isolated from a spontaneous, slowly growing fibrosarcoma of a domestic short-haired 4-year-old castrated cat. The virus codes for a gag-onc fusion protein of 83,000 molecular weight phosphorylated in vivo at serine,
Influence of vinblastine containing chemotherapy on tumor tissue membrane fluidity; an EPR study. A case report.
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The influence of vinblastine (VLB) in combined chemotherapy on tumor cell membrane fluidity of a patient with exulcerated soft tissue sarcoma was studied by the electron paramagnetic resonance method (EPR). Tissue samples were taken before and after applications of VLB, Cis-Platinum (CDP) and
Role of whole-body lipids and nitrogen as limiting factors for survival in tumor-bearing mice with anorexia and cachexia.
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This study was designed to ascertain whether the overall availability of whole-body lipids and nitrogen is a limiting factor for survival in tumor-bearing mice suffering from anorexia and cachexia. Three-month-old nongrowing mice (C57BL/6J) were given s.c. transplants of a methylcholanthrene-induced
Myristic acid is incorporated into the two acylatable domains of the functional glycoprotein CD9 in ester, but not in amide bonds.
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CD9 is a signal-initiating glycoprotein of uncertain membrane insertion which contains more than one locus of acylation and is distinguished by being the major acylatable platelet protein. The N-terminus of CD9 is blocked to Edman degradation. We investigated whether [3H]myristic acid could be
Global metabolic profiling of infection by an oncogenic virus: KSHV induces and requires lipogenesis for survival of latent infection.
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Like cancer cells, virally infected cells have dramatically altered metabolic requirements. We analyzed global metabolic changes induced by latent infection with an oncogenic virus, Kaposi's Sarcoma-associated herpesvirus (KSHV). KSHV is the etiologic agent of Kaposi's Sarcoma (KS), the most common
Posttranslational processing of p21 ras proteins involves palmitylation of the C-terminal tetrapeptide containing cysteine-186.
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The p21 proteins of ras oncogenes are synthesized as precursors in the cytosol. After processing, which involves acylation, the products are associated with the plasma membrane in eucaryotic cells. The p21 overproduced in Escherichia coli, however, is not processed by acylation. A synthetic
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