Ring closure activates yeast γTuRC for species-specific microtubule nucleation.
Ring closure activates yeast γTuRC for species-specific microtubule nucleation.
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DOI:
10.1038/nsmb.2953
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发表时间:
2015-02
影响因子:
16.8
通讯作者:
Agard, David A.
中科院分区:
文献类型:
--
作者:
Kollman, Justin M.;Greenberg, Charles H.;Li, Sam;Moritz, Michelle;Zelter, Alex;Fong, Kimberly K.;Fernandez, Jose-Jesus;Sali, Andrej;Kilmartin, John;Davis, Trisha N.;Agard, David A.
The γ-tubulin ring complex (γTuRC) is the primary microtubule nucleator in cells. γTuRC is assembled from repeating γ-tubulin small complex (γTuSC) subunits and is thought to function as a template by presenting a γ-tubulin ring that mimics microtubule geometry. However, a previous yeast γTuRC structure showed γTuSC in an open conformation that prevents matching to microtubule symmetry. By contrast, we show here that γ-tubulin complexes are in a closed conformation when attached to microtubules. To confirm its functional importance we trapped the closed state and determined its structure, showing that the γ-tubulin ring precisely matches microtubule symmetry and providing detailed insight into γTuRC architecture. Importantly, the closed state is a stronger nucleator, suggesting this conformational switch may allosterically control γTuRC activity. Finally, we demonstrate that γTuRCs have a profound preference for tubulin from the same species.
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影响因子:
3
作者:
Choy, Rebeca M.;Kollman, Justin M.;Zelter, Alex;Davis, Trisha N.;Agard, David A.
通讯作者:
Agard, David A.
DOI:
10.1083/jcb.59.2.267
发表时间:
1973-11
期刊:
The Journal of cell biology
影响因子:
--
作者:
Tilney LG;Bryan J;Bush DJ;Fujiwara K;Mooseker MS;Murphy DB;Snyder DH
通讯作者:
Snyder DH
影响因子:
3.3
作者:
Nazarova E;O'Toole E;Kaitna S;Francois P;Winey M;Vogel J
通讯作者:
Vogel J
DOI:
10.1126/science.1205193
发表时间:
2011-06-24
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Keck JM;Jones MH;Wong CC;Binkley J;Chen D;Jaspersen SL;Holinger EP;Xu T;Niepel M;Rout MP;Vogel J;Sidow A;Yates JR 3rd;Winey M
通讯作者:
Winey M
影响因子:
3
作者:
Egelman, Edward H.
通讯作者:
Egelman, Edward H.