A mechanism for CO regulation of ion channels.
A mechanism for CO regulation of ion channels.
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DOI:
10.1038/s41467-018-03291-z
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发表时间:
2018-03-02
影响因子:
16.6
通讯作者:
Raven E
中科院分区:
文献类型:
--
作者:
Kapetanaki SM;Burton MJ;Basran J;Uragami C;Moody PCE;Mitcheson JS;Schmid R;Davies NW;Dorlet P;Vos MH;Storey NM;Raven E
Despite being highly toxic, carbon monoxide (CO) is also an essential intracellular signalling molecule. The mechanisms of CO-dependent cell signalling are poorly defined, but are likely to involve interactions with heme proteins. One such role for CO is in ion channel regulation. Here, we examine the interaction of CO with KATP channels. We find that CO activates KATP channels and that heme binding to a CXXHX16H motif on the SUR2A receptor is required for the CO-dependent increase in channel activity. Spectroscopic and kinetic data were used to quantify the interaction of CO with the ferrous heme-SUR2A complex. The results are significant because they directly connect CO-dependent regulation to a heme-binding event on the channel. We use this information to present molecular-level insight into the dynamic processes that control the interactions of CO with a heme-regulated channel protein, and we present a structural framework for understanding the complex interplay between heme and CO in ion channel regulation. Despite being highly toxic, carbon monoxide (CO) is also essential as an intracellular signalling molecule, but CO-dependent signalling is poorly understood. Here, authors employ spectroscopic and electrophysiology methods and find that CO activates KATP channels via SUR2A, a heme-regulated receptor.
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DOI:
10.1073/pnas.1615195114
发表时间:
2017-03-14
影响因子:
11.1
作者:
Abshire JR;Rowlands CJ;Ganesan SM;So PT;Niles JC
通讯作者:
Niles JC
影响因子:
7.7
作者:
Martin, Gregory M.;Yoshioka, Craig;Shyng, Show-Ling
通讯作者:
Shyng, Show-Ling
影响因子:
64.8
作者:
Rajagopal, Abbhirami;Rao, Anita U.;Hamza, Iqbal
通讯作者:
Hamza, Iqbal
影响因子:
3.3
作者:
Lukacs, Andras;Eker, Andre P. M.;Vos, Marten H.
通讯作者:
Vos, Marten H.
影响因子:
3.5
作者:
MARDEN, MC;LECLERC, L;POYART, C
通讯作者:
POYART, C