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排序方式: 共有112条查询结果,搜索用时 15 毫秒
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Morozov AV Korenberg EI Fadeeva IA Gorelova NB 《Molekuliarnaia genetika, mikrobiologiia i virusologiia》2008,(1):38-41
In the present work, we performed a phenotyping analysis of 45 B. afzelii 89-a.a. long amino acid sequences of 7 different allele variants, corresponding to the surface-exposed loop region of P66. 45 investigated isolates showed 5 phenotypically different variants; 2 phenotypically different variants of loop region, in particular, also showed mutations in the putative monoclonal antibody H1337 binding site; the similarity between the amino acid sequences taken from different variants is about 96.66% to 98.88%; in one natural locus up to 3 different phenotypes of P66 could circulate simultaneously. 相似文献
44.
Walsh DM Klyubin I Fadeeva JV Rowan MJ Selkoe DJ 《Biochemical Society transactions》2002,30(4):552-557
Despite extensive genetic and animal modelling data that support a central role for the amyloid beta-protein (A beta) in the genesis of Alzheimer's disease, the specific form(s) of A beta which causes injury to neurons in vivo has not been identified. In the present study, we examine the importance of soluble, pre-fibrillar assemblies of A beta as mediators of neurotoxicity. Specifically, we review the role of cell-derived SDS-stable oligomers, their blocking of hippocampal long-term potentiation in vivo and the finding that this blocking can be prevented by prior treatment of oligomer-producing cells with gamma-secretase inhibitors. 相似文献
45.
Walsh DM Fadeeva JV LaVoie MJ Paliga K Eggert S Kimberly WT Wasco W Selkoe DJ 《Biochemistry》2003,42(22):6664-6673
Regulated intramembrane proteolysis (RIP) of the amyloid precursor protein (APP) produces amyloid beta-protein (Abeta), the probable causative agent of Alzheimer's disease (AD), and is therefore an important target for therapeutic intervention. However, there is a burgeoning consensus that gamma-secretase, one of the proteases that generates Abeta, is also critical for the signal transduction of APP and a growing list of other receptors. APP is a member of a gene family that includes two amyloid precursor-like proteins, APLP1 and APLP2. Although APP and the APLPs undergo similar proteolytic processing, there is little information about the role of their gamma-secretase-generated intracellular domains (ICDs). Here, we show that APLP1 and 2 undergo presenilin-dependent RIP similar to APP, resulting in the release of a approximately 6 kDa ICD for each protein. Each of the ICDs are degraded by an insulin degrading enzyme-like activity, but they can be stabilized by members of the FE65 family and translocate to the nucleus. Given that modulation of APP processing is a therapeutic target and that the APLPs are processed in a manner similar to APP, any strategy aimed at altering APP proteolysis will have to take into account possible effects on signaling by APLP 1 and 2. 相似文献
46.
The ultrastructure of liver cells was studied in rooks (Corvus frugilegus) living in radioactive and chemical contamination areas. The ultrastructure of liver cells from rook as well as jackdaw (Corvus monedula) and hooded crow (Corvus cornix) (Corvidae family) from a conventionally clean area was studied as control. Control hepatocytes proved to contain a great number of mitochondria, many of which were swollen and had clear matrix and disorganized cristae. The cristae nearly lacked glycogen and had abundant lipid droplets, which often tightly contacted mitochondria. The cytoplasm of hepatocytes in birds from both ecologically unfavorable areas had numerous mitochondria with the same ultrastructure. In contrast to control, the hepatocyte cytoplasm: (1) contained a lot of glycogen; (2) there were many lipid droplets, which directly contacted glycogen granules; and (3) had more abundant peroxisomes. In addition to normal erythrocytes, the sinusoids contained erythrocytes with mitochondria, vesicles, and lipid droplets in their cytoplasm. Analysis of many micrographs of lipid droplets contacting glycogen granules, mitochondria, peroxisomes, and cisterns of smooth endoplasmic reticulum allowed us to propose that glycogen is synthesized via gluconeogenesis from glycerol and products of fatty acid oxidation in the liver cell cytoplasm of rooks from ecologically unfavorable areas as distinct from control. 相似文献
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Yu. I. Fadeeva N. V. Antipova I. P. Baskova L. L. Zavalova 《Biochemistry (Moscow) Supplemental Series B: Biomedical Chemistry》2014,8(1):69-72
Fractionation of the highly purified but low active recombinant protein destabilase-lysozyme (Dest-Lys) by cation exchange chromatography on a TSK CM 3-SW chromatography the non-active fraction (IV) containing 90% of total protein has been separated. Fractions I, II, and III contained proteins with lysozyme and isopeptidase activities and their lysozyme activity correlated with the activity of native Dest-Lys. However, the ratio of lysozyme and isopeptidase activities differed in these fractions; maximal lysozyme activity was found in fraction III, while maximal isopeptidase activity was associated with fraction I. Possible regulation of different functions of Dest-Lys is discussed in the context of formation of its various complexes. 相似文献
48.
Dioxidine++-induced changes were shown to occur in the protein composition of the cells of Staphylococcus aureus. The most significant damages were observed in the composition of exoproteins. Dioxidine++ had a specific inhibitory effect on intracellular nuclease, which was accompanied by a decrease in virulence and disorders in the toxin formation. 相似文献
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Minaychev V. V. Kirsanova P. O. Zvyagina A. I. Odintsova A. S. Fadeeva I. S. Akatov V. S. 《Biophysics》2019,64(5):761-764
Biophysics - Abstract—Different synthetic calcium phosphate compounds are used as osteoplastic materials for filling of bone defects during surgical reconstruction of bone. Synthetic... 相似文献