Cryo-EM structure of the folded-back state of human β-cardiac myosin.
Cryo-EM structure of the folded-back state of human β-cardiac myosin.
复制标题
DOI:
10.1038/s41467-023-38698-w
复制
发表时间:
2023-05-31
影响因子:
16.6
通讯作者:
Robert-Paganin J
中科院分区:
文献类型:
--
作者:
Grinzato A;Auguin D;Kikuti C;Nandwani N;Moussaoui D;Pathak D;Kandiah E;Ruppel KM;Spudich JA;Houdusse A;Robert-Paganin J
To save energy and precisely regulate cardiac contractility, cardiac muscle myosin heads are sequestered in an ‘off’ state that can be converted to an ‘on’ state when exertion is increased. The ‘off’ state is equated with a folded-back structure known as the interacting-heads motif (IHM), which is a regulatory feature of all class-2 muscle and non-muscle myosins. We report here the human β-cardiac myosin IHM structure determined by cryo-electron microscopy to 3.6 Å resolution, providing details of all the interfaces stabilizing the ‘off’ state. The structure shows that these interfaces are hot spots of hypertrophic cardiomyopathy mutations that are thought to cause hypercontractility by destabilizing the ‘off’ state. Importantly, the cardiac and smooth muscle myosin IHM structures dramatically differ, providing structural evidence for the divergent physiological regulation of these muscle types. The cardiac IHM structure will facilitate development of clinically useful new molecules that modulate IHM stability. The authors report the high-resolution structure of human β-cardiac myosin in its sequestered state. The results provide insights into the cardiac regulation and represent a tool to investigate the development of inherited cardiomyopathies.
登录
查看更多内容
影响因子:
48
作者:
Barad BA;Echols N;Wang RY;Cheng Y;DiMaio F;Adams PD;Fraser JS
通讯作者:
Fraser JS
DOI:
10.1073/pnas.1809540115
发表时间:
2018-08-28
影响因子:
11.1
作者:
Anderson, Robert L.;Trivedi, Darshan V.;Spudich, James A.
通讯作者:
Spudich, James A.
DOI:
10.1073/pnas.0606741103
发表时间:
2006-11-21
影响因子:
11.1
作者:
Blankenfeldt, Wulf;Thoma, Nicolas H.;Schlichting, Ilme
通讯作者:
Schlichting, Ilme
影响因子:
5.6
作者:
Brito,Reicy;Alamo,Lorenzo;Padron,Raul
通讯作者:
Padron,Raul
DOI:
10.1107/s0907444909042073
发表时间:
2010-01
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Chen VB;Arendall WB 3rd;Headd JJ;Keedy DA;Immormino RM;Kapral GJ;Murray LW;Richardson JS;Richardson DC
通讯作者:
Richardson DC