Proteomic and functional mapping of cardiac NaV1.5 channel phosphorylation sites.
Proteomic and functional mapping of cardiac NaV1.5 channel phosphorylation sites.
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DOI:
10.1085/jgp.202012646
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发表时间:
2021-02-01
期刊:
影响因子:
--
通讯作者:
Marionneau C
中科院分区:
文献类型:
--
作者:
Lorenzini M;Burel S;Lesage A;Wagner E;Charrière C;Chevillard PM;Evrard B;Maloney D;Ruff KM;Pappu RV;Wagner S;Nerbonne JM;Silva JR;Townsend RR;Maier LS;Marionneau C
Lorenzini et al. describe the native phosphorylation sites of NaV1.5 channels in mouse left ventricles. By analyzing expression and function of phosphosilent and phosphomimetic mutants, they identify phosphorylation hot spots regulating channel cell surface expression and gating. Phosphorylation of the voltage-gated Na+ (NaV) channel NaV1.5 regulates cardiac excitability, yet the phosphorylation sites regulating its function and the underlying mechanisms remain largely unknown. Using a systematic, quantitative phosphoproteomic approach, we analyzed NaV1.5 channel complexes purified from nonfailing and failing mouse left ventricles, and we identified 42 phosphorylation sites on NaV1.5. Most sites are clustered, and three of these clusters are highly phosphorylated. Analyses of phosphosilent and phosphomimetic NaV1.5 mutants revealed the roles of three phosphosites in regulating NaV1.5 channel expression and gating. The phosphorylated serines S664 and S667 regulate the voltage dependence of channel activation in a cumulative manner, whereas the nearby S671, the phosphorylation of which is increased in failing hearts, regulates cell surface NaV1.5 expression and peak Na+ current. No additional roles could be assigned to the other clusters of phosphosites. Taken together, our results demonstrate that ventricular NaV1.5 is highly phosphorylated and that the phosphorylation-dependent regulation of NaV1.5 channels is highly complex, site specific, and dynamic.
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影响因子:
5.5
作者:
Kapplinger, Jamie D.;Tester, David J.;Salisbury, Benjamin A.;Carr, Janet L.;Harris-Kerr, Carole;Pollevick, Guido D.;Wilde, Arthur A. M.;Ackerman, Michael J.
通讯作者:
Ackerman, Michael J.
影响因子:
37.8
作者:
Koval OM;Snyder JS;Wolf RM;Pavlovicz RE;Glynn P;Curran J;Leymaster ND;Dun W;Wright PJ;Cardona N;Qian L;Mitchell CC;Boyden PA;Binkley PF;Li C;Anderson ME;Mohler PJ;Hund TJ
通讯作者:
Hund TJ
DOI:
10.1161/circep.113.000400
发表时间:
2013-06
期刊:
Circulation. Arrhythmia and electrophysiology
影响因子:
--
作者:
Aiba T;Barth AS;Hesketh GG;Hashambhoy YL;Chakir K;Tunin RS;Greenstein JL;Winslow RL;Kass DA;Tomaselli GF
通讯作者:
Tomaselli GF
影响因子:
4.4
作者:
Erde, Jonathan;Loo, Rachel R. Ogorzalek;Loo, Joseph A.
通讯作者:
Loo, Joseph A.
影响因子:
10.8
作者:
Boehmer, C;Wilhelm, V;Lang, F
通讯作者:
Lang, F