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首页> 外文期刊>The Journal of Antibiotics: An International Journal >Fungal Metabolite, Epoxyquinol B, Crosslinks Proteins by Epoxy-thiol Conjugation.
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Fungal Metabolite, Epoxyquinol B, Crosslinks Proteins by Epoxy-thiol Conjugation.

机译:真菌代谢产物,环氧喹诺尔B,通过环氧-硫醇缀合使蛋白质交联。

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摘要

Epoxyquinol B (EPQB) is a fungal metabolite, containing two alpha,beta-epoxy ketones. We previously showed that EPQB inhibited the signal transduction involved in angiogenesis through the binding to cysteine residues of receptor kinases. However, the inhibitory mechanism was undefined. In this report, we found that one EPQB molecule is covalently bound to two L-cysteine molecules through two epoxide residues on EPQB. Furthermore, EPQB crosslinked binding proteins through the cysteine residues. These results suggest that EPQB inhibits receptor kinases by crosslinking with other protein or by intramolecular crosslinking.
机译:环氧喹诺尔B(EPQB)是一种真菌代谢产物,含有两个α,β-环氧酮。我们以前表明,EPQB通过与受体激酶的半胱氨酸残基结合而抑制了涉及血管生成的信号转导。然而,抑制机制尚不清楚。在此报告中,我们发现一个EPQB分子通过EPQB上的两个环氧基残基与两个L-半胱氨酸分子共价结合。此外,EPQB通过半胱氨酸残基使结合蛋白交联。这些结果表明,EPQB通过与其他蛋白质交联或分子内交联来抑制受体激酶。

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