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Biochemistry (Moscow) - Hypertrophic cardiomyopathy (HCM) is a hereditary heart disease caused by mutations in the sarcomere genes, which is accompanied by myocardial fibrosis leading to... 相似文献
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Kiselev I. S. Kulakova O. G. Danilova L. V. Baturina O. A. Kabilov M. R. Popova E. V. Boyko A. N. Favorova O. O. 《Molecular Biology》2022,56(3):417-423
Molecular Biology - The pathogenesis of multiple sclerosis (MS), a chronic disease of the CNS, includes autoimmune and neurodegenerative components. In most cases, patients develop... 相似文献
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Molecular Biology - Pharmacogenetics (PG) investigates the inherited variants of the human genome that underlie individual differences in drug metabolic transformation, delivery, and mechanism of... 相似文献
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Tsareva EIu Kulakova OG Makarycheva OIu Boĭko AN Shchur SG Lashch NIu Popova NF Gusev EI Bashinskaia VV L'vov DV Favorov AV Ochs MF Favorova OO 《Molekuliarnaia biologiia》2011,45(6):963-972
Complex association analysis of copaxone (glatiramer acetate) immunotherapy efficacy with allelic polymorphism in the number of immune response genes, which encode interferone beta (IFNB1), transforming growth factor beta1 (TGFB1), interferone gamma (IFNG), tumor necrosis factor (TNF), interferon alpha/beta receptor 1 (IFNAR1), CC chemokine receptor 5 (CCR5), interleukin 7 receptor alpha subunit (IL7RA), cytotoxic T-lymphocyte antigen 4 (CTLA4) and HLA class II histocompatibility antigen beta chain (DRB1) was performed with APSampler algorithm for 285 multiple sclerosis patients of Russian ethnicity. The results show evidence for the contribution of polymorphic variants in CCRS, DRB1, IFNG, TGFB1, IFNAR1, IL7RA and, probably, TNF and CTLA4 genes to copaxone treatment response. Single alleles of CCR5 and DRB1 genes are reliably associated with treatment efficacy. Carriage of allelic variants of other above mentioned genes contribute with reliable effect to copaxone treatment response as part of bi- and three-allelic combinations only. Present investigation may support basis toward the future possibility of prognostic test realization, which can provide a personal choice of immunomodulatory treatment for a patient with multiple sclerosis. 相似文献
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O O Favorova 《Molekuliarnaia biologiia》1984,18(1):205-226
The correct aminoacylation of tRNA with the proper aminoacid by aminoacyl-tRNA synthetase is one of the key reactions which determines the overall high fidelity of protein biosynthesis. The initial selection of the amino acid is achieved in the active centre of the synthetase at the activation step due to differences in the side chains binding energies of specific substrate and the competing amino acids present in cell. If, nevertheless, the activation of amino acids structurally similar to the cognate one does proceed, additional mechanisms of correction which are based on the decomposition of unstable noncognate (intermediate or final) product of the tRNA aminoacylation reaction, by synthetase are switched on. In this review the literature on the specificity of aminoacyl-tRNA synthetases at amino acid activation step is analyzed along with the proofreading mechanisms which allow the elimination of the errors, leading to so called superspecifity of aminoacyl-tRNA synthetases. 相似文献
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V S Prasolov O O Favorova G V Margulis L L Kisselev 《Biochimica et biophysica acta》1975,378(1):92-106
Earlier studies have shown that native tryptophanyl-tRNA synthetase from beef pancreas is composed of two apparently identical subunits having a molecular weight of 60000 plus or minus 2000 each. Incubation of the pruified enzyme with trypsin under restrictive conditions results in splitting of each subunit to form an enzymatically inactive polypeptide chain of mol. wt 24500 plus or minus 1500. During proteolysis, two distinct intermediate forms of mol. wt 51000 plus or minus 2000 and 40000 plus or minus 2000 and fragments of mol. wt 14000 plus or minus 2500 are formed. The presence of substrates, viz. ATP, tryptophan or tryptophanyl adenylate, decreases the rate of proteolysis. However, a band pattern monitored by acrylamide gel electrophoresis is qualitatively indistinguishable from that obtained in the absence of substrates. Native and trypsin-modified subunits (the latter having a molecular weight of 24500) have been maleylated, reduced, carbosymethylated and subjected to exhaustive digestion by trypsin followed by peptide mapping. Comparison of the finger prints has shown that the trypsin-modified subunit represents a polypeptide with lowered content of dicarboxylic amino acids. That the number of peptides revealed after complete proteolysis of native and trypsin-modified subunits does not favour the presence of long repetitive sequences in each subunit, is at variance with some bacterial aminoacyl-tRNA synthetases. Study of the fluorescence polarisation of 1-anilino-8-napthalene sulphonate adsorbed on the dimeric tryptophanyl-tRNA synthetase, indicates that the molecule behaves as a complete entity in Brownian rotation. The trypsin-resistant end products, composed of two types of polypeptides (mol. wts 24500 and 14000), remain associated with each other. From the mol. wt of this associate it follows that each fragment is present in the associate in duplicate. When the purification procedure was carried out in the absence of a protease inhibitor, the active modified enzyme form was obtained. As judged from the molecular weight values, it is composed of two equal subunits corresponding to one of the products of limited proteolysis. The data presented are compatible with compact three-dimensional structure of tryptophanyl-tRNA synthetase having very limited regions exposed to exogenous or endogenous proteolysis. 相似文献