首页> 外文期刊>Journal of Inorganic Biochemistry: An Interdisciplinary Journal >Synthetic analogs for oxovanadium(IV/V)-glutathione interaction: an NMR, EPR, synthetic and structural study of oxovanadium(IV/V) compounds with sulfhydryl-containing pseudopeptides and dipeptides
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Synthetic analogs for oxovanadium(IV/V)-glutathione interaction: an NMR, EPR, synthetic and structural study of oxovanadium(IV/V) compounds with sulfhydryl-containing pseudopeptides and dipeptides

机译:氧钒(IV / V)-谷胱甘肽相互作用的合成类似物:氧杂钒(IV / V)化合物与含巯基的假肽和二肽的NMR,EPR,合成和结构研究

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摘要

The reaction of [VO(CH3COO)(2)(phen)] (phen=1,10-phenanthroline) with the sulfhydryl-containing pseudopeptides (scp), N-(2-mercaptopropionyl) glycine (H(3)mpg), N-(2-mercaptopropionyl) cysteine (H(4)m(2)pc), N-(3-mercaptopropionyl)cysteine (H(4)m(3)pc) and the dipeptides glycylglycine (H(2)glygly) and glycyl-L-alanine (H(2)glyala), in the presence of triethylamine, results in the formation of the compounds Et3NH[VO(mpg)(phen)] (1), (Et3NH)(2)[VO(m(2)pc)] (4), [Et3NH)(2)[VO(m(3)pc)] (5), [VO(glygly)(phen)] . 2CH(3)OH (2 . 2CH(3)OH) and [VO(glyala)(phen)] . CH3OH (3 . CH3OH). Evidence for the molecular connectivity in 2 . CH3OH was established by X-ray crystallography, showing the vanadium(IV) atom ligated to a tridentate glygly(2-) ligand at the N-amine, N-peptide and O-carboxylato atoms. Combination of the correlation plot of the EPR parameters g(z) versus A(z), together with the additivity relationship supported the prediction of the equatorial donor atom sets of the (VO2+)-O-IV center at various pH values for the (VO2+)-O-IV-glutathione system considered in this study. Model NMR studies (interaction of vanadium(V) with the sep H(3)mpg) showed that there is a possibility of vanadium(V) ligation to glutathione. (C) 2000 Elsevier Science Inc. All rights reserved. [References: 50]
机译:[VO(CH3COO)(2)(phen)](phen = 1,10-菲咯啉)与含巯基的假肽(scp),N-(2-巯基丙酰基)甘氨酸(H(3)mpg), N-(2-巯基丙酰基)半胱氨酸(H(4)m(2)pc),N-(3-巯基丙酰基)半胱氨酸(H(4)m(3)pc)和二肽甘氨酰甘氨酸(H(2)glygly)和在三乙胺存在下的甘氨酰-L-丙氨酸(H(2)glyala)导致化合物Et3NH [VO(mpg)(phen)](1),(Et3NH)(2)[VO( m(2)pc)](4),[Et 3 NH)(2)[VO(m(3)pc)](5),[VO(glygly)(phen)]。 2CH(3)OH(2. 2CH(3)OH)和[VO(glyala)(phen)]。 CH 3 OH(3.CH 3 OH)。分子连通性的证据2。 CH3OH通过X射线晶体学确定,显示钒(IV)原子在N-胺,N-肽和O-羧基原子上与三齿glygly(2-)配体连接。 EPR参数g(z)与A(z)的相关图与可加关系的结合,为(VO2 +)-O-IV中心在(pH2)的(VO2 +)-O-IV中心的赤道供体原子集的预测提供了支持。这项研究考虑了VO2 +)-O-IV-谷胱甘肽系统。 NMR模型研究(钒(V)与sep H(3)mpg的相互作用)显示钒(V)与谷胱甘肽连接的可能性。 (C)2000 Elsevier Science Inc.保留所有权利。 [参考:50]

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