Allosteric communication in the dynein motor domain.
Allosteric communication in the dynein motor domain.
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DOI:
10.1016/j.cell.2014.10.018
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发表时间:
2014-11-06
期刊:
影响因子:
64.5
通讯作者:
Vale RD
中科院分区:
文献类型:
--
作者:
Bhabha G;Cheng HC;Zhang N;Moeller A;Liao M;Speir JA;Cheng Y;Vale RD
Dyneins power microtubule motility using ring-shaped, AAA-containing motor domains. Here, we report X-ray and electron microscopy (EM) structures of yeast dynein bound to different ATP analogs, which collectively provide insight into the roles of dynein’s two major ATPase sites, AAA1 and AAA3, in the conformational change mechanism. ATP binding to AAA1 triggers a cascade of conformational changes that propagate to all six AAA domains and cause a large movement of the “linker,” dynein’s mechanical element. In contrast to the role of AAA1 in driving motility, nucleotide transitions in AAA3 gate the transmission of conformational changes between AAA1 and the linker, suggesting that AAA3 acts as a regulatory switch. Further structural and mutational studies also uncover a role for the linker in regulating the catalytic cycle of AAA1. Together, these results reveal how dynein’s two major ATP-binding sites initiate and modulate conformational changes in the motor domain during motility.
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影响因子:
48
作者:
Kucukelbir, Alp;Sigworth, Fred J.;Tagare, Hemant D.
通讯作者:
Tagare, Hemant D.
影响因子:
16.8
作者:
通讯作者:
--
DOI:
10.1016/j.bbamcr.2011.06.007
发表时间:
2012-01
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Baker TA;Sauer RT
通讯作者:
Sauer RT
影响因子:
6.8
作者:
Burgess, SA;Knight, PJ
通讯作者:
Knight, PJ
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K