National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)
1R01CA206573-01A1
米国
引用
ジャーナル: Sci Adv / 年: 2018 タイトル: Mechanism of calmodulin inactivation of the calcium-selective TRP channel TRPV6. 著者: Appu K Singh / Luke L McGoldrick / Edward C Twomey / Alexander I Sobolevsky / 要旨: Calcium (Ca) plays a major role in numerous physiological processes. Ca homeostasis is tightly controlled by ion channels, the aberrant regulation of which results in various diseases including ...Calcium (Ca) plays a major role in numerous physiological processes. Ca homeostasis is tightly controlled by ion channels, the aberrant regulation of which results in various diseases including cancers. Calmodulin (CaM)-mediated Ca-induced inactivation is an ion channel regulatory mechanism that protects cells against the toxic effects of Ca overload. We used cryo-electron microscopy to capture the epithelial calcium channel TRPV6 (transient receptor potential vanilloid subfamily member 6) inactivated by CaM. The TRPV6-CaM complex exhibits 1:1 stoichiometry; one TRPV6 tetramer binds both CaM lobes, which adopt a distinct head-to-tail arrangement. The CaM carboxyl-terminal lobe plugs the channel through a unique cation-π interaction by inserting the side chain of lysine K115 into a tetra-tryptophan cage at the pore's intracellular entrance. We propose a mechanism of CaM-mediated Ca-induced inactivation that can be explored for therapeutic design.
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2018年8月22日
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2018年8月22日
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2018年8月22日
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2018年8月22日
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2018年8月22日
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2018年8月22日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
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