Structural basis for calmodulin as a dynamic calcium sensor.
Structural basis for calmodulin as a dynamic calcium sensor.
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钙调蛋白作为动态钙传感器的结构基础。
DOI:
10.1016/j.str.2012.03.019
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Zhang,Ji-fang
中科院分区:
文献类型:
--
作者:
Zhang,Miao;Abrams,Cameron;Wang,Liping;Gizzi,Anthony;He,Liping;Lin,Ruihe;Chen,Yuan;Loll,PatrickJ;Pascal,JohnM;Zhang,Ji-fang
Calmodulin is a prototypical and versatile Ca2+sensor with EF hands as its high-affinity Ca2+binding domains. Calmodulin is present in all eukaryotic cells, mediating Ca2+-dependent signaling. Upon binding Ca2+, calmodulin changes its conformation to form complexes with a diverse array of target proteins. Despite a wealth of knowledge on calmodulin, little is known on how target proteins regulate calmodulin's ability to bind Ca2+. Here, we take advantage of two splice variants of SK2 channels, which are activated by Ca2+-bound calmodulin but show different sensitivity to Ca2+for their activation. Protein crystal structures and other experiments show that, depending on which SK2 splice variant it binds to, calmodulin adopts drastically different conformations with different affinities for Ca2+at its C-lobe. Such target protein-induced conformational changes make calmodulin a dynamic Ca2+sensor capable of responding to different Ca2+concentrations in cellular Ca2+signaling.
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影响因子:
9.5
作者:
Cheung,JY;Leaf,A;Bonventre,JV
通讯作者:
Bonventre,JV
DOI:
--
发表时间:
1986
期刊:
The Journal of pharmacology and experimental therapeutics
影响因子:
--
作者:
Bradford,BU;Marotto,M;Lemasters,JJ;Thurman,RG
通讯作者:
Thurman,RG
影响因子:
5.6
作者:
P. Hyslop;D. Hinshaw;I. Schraufstätter;L. Sklar;R. Spragg;C. Cochrane
通讯作者:
P. Hyslop;D. Hinshaw;I. Schraufstätter;L. Sklar;R. Spragg;C. Cochrane
影响因子:
2
作者:
M. Wolman
通讯作者:
M. Wolman
影响因子:
15.9
作者:
SPRAGG, RG;HINSHAW, DB;COCHRANE, CG
通讯作者:
COCHRANE, CG