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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Mononuclear copper(ii) complexes with 3,5-substituted-4-salicylidene-amino- 3,5-dimethyl-1,2,4-triazole: Synthesis, structure and potent inhibition of protein tyrosine phosphatases
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Mononuclear copper(ii) complexes with 3,5-substituted-4-salicylidene-amino- 3,5-dimethyl-1,2,4-triazole: Synthesis, structure and potent inhibition of protein tyrosine phosphatases

机译:单核铜(ii)与3,5-取代的4-水杨亚基-氨基-3,5-二甲基-1,2,4-三唑的配合物:蛋白质酪氨酸磷酸酶的合成,结构和有效抑制

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摘要

Six copper complexes of Schiff base ligands containing 3,5-substituted-4- salicylideneamino-3,5-dimethyl-1,2,4-triazole have been synthesized and well characterized. The structures of complexes 1 and 2 were determined by X-ray crystal analysis. Fluorescence and potentiometric study indicated that in the physiological pH range, one ligand was dissociated from the complexes to form 1:1 mononucleus copper complexes. The complexes potently inhibit protein tyrosine phosphatase 1B (PTP1B), T-cell protein tyrosine phosphatase (TCPTP), megakaryocyte protein tyrosine phosphatase 2 (PTP-MEG2) and Src homology phosphatase 1 (SHP-1) with 3-4 fold selectivity against PTP1B over TCPTP and PTP-MEG2, and 3-9 fold over SHP-1, but display almost no inhibition against Src homology phosphatase 2 (SHP-2). Complex 1 inhibits PTP1B with a competitive model with Ki of 30 nM. Substitution with small groups at the phenyl of the ligand does not obviously influence the inhibitory ability of the complexes.
机译:合成并很好地表征了六个含有3,5-取代的4-水杨基亚氨基-3,5-二甲基-1,2,4-三唑的席夫碱配体的铜配合物。配合物1和2的结构通过X射线晶体分析确定。荧光和电位研究表明,在生理pH范围内,一种配体从配合物中解离形成1:1单核铜配合物。该复合物可有效抑制蛋白酪氨酸磷酸酶1B(PTP1B),T细胞蛋白酪氨酸磷酸酶(TCPTP),巨核细胞蛋白酪氨酸磷酸酶2(PTP-MEG2)和Src同源磷酸酶1(SHP-1),对PTP1B的选择性为3-4倍在TCPTP和PTP-MEG2中,SHP-1比SHP-1高3-9倍,但对Src同源性磷酸酶2(SHP-2)几乎没有抑制作用。复合物1以Ki为30 nM的竞争模型抑制PTP1B。在配体的苯基上被小基团取代不会明显影响复合物的抑制能力。

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