High-resolution microtubule structures reveal the structural transitions in αβ-tubulin upon GTP hydrolysis.
High-resolution microtubule structures reveal the structural transitions in αβ-tubulin upon GTP hydrolysis.
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高分辨率微管结构揭示了 GTP 水解后 αβ-微管蛋白的结构转变。
DOI:
10.1016/j.cell.2014.03.053
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发表时间:
2014-05-22
期刊:
影响因子:
64.5
通讯作者:
Nogales E
中科院分区:
文献类型:
--
作者:
Alushin GM;Lander GC;Kellogg EH;Zhang R;Baker D;Nogales E
Dynamic instability, the stochastic switching between growth and shrinkage, is essential for microtubule function. This behavior is driven by GTP hydrolysis in the microtubule lattice, and is inhibited by anticancer agents like Taxol. We provide new insight into the mechanism of dynamic instability, based on high-resolution cryo-EM structures (4.7–5.6 Å) of dynamic microtubules and microtubules stabilized by GMPCPP or Taxol. We infer that hydrolysis leads to a compaction around the E-site nucleotide at longitudinal interfaces, as well as movement of the α–tubulin intermediate domain and H7 helix. Displacement of the C-terminal helices in both α– and β–tubulin subunits suggests an effect on interactions with binding partners that contact this region. Taxol inhibits most of these conformational changes, allosterically inducing a GMPCPP-like state. Lateral interactions are similar in all conditions we examined, suggesting that microtubule lattice stability is primarily modulated at longitudinal interfaces.
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影响因子:
5.6
作者:
Grafmueller, Andrea;Noya, Eva G.;Voth, Gregory A.
通讯作者:
Voth, Gregory A.
影响因子:
3
作者:
Egelman, Edward H.
通讯作者:
Egelman, Edward H.
影响因子:
7.8
作者:
Al-Bassam, Jawdat;Ozer, Rachel S;Safer, Daniel;Halpain, Shelley;Milligan, Ronald A
通讯作者:
Milligan, Ronald A
DOI:
10.1126/science.1221698
发表时间:
2012-08-17
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Ayaz P;Ye X;Huddleston P;Brautigam CA;Rice LM
通讯作者:
Rice LM
影响因子:
64.8
作者:
通讯作者:
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