CLASP Suppresses Microtubule Catastrophes through a Single TOG Domain.
CLASP Suppresses Microtubule Catastrophes through a Single TOG Domain.
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DOI:
10.1016/j.devcel.2018.05.032
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发表时间:
2018-07-02
影响因子:
11.8
通讯作者:
Akhmanova A
中科院分区:
文献类型:
--
作者:
Aher A;Kok M;Sharma A;Rai A;Olieric N;Rodriguez-Garcia R;Katrukha EA;Weinert T;Olieric V;Kapitein LC;Steinmetz MO;Dogterom M;Akhmanova A
The dynamic instability of microtubules plays a key role in controlling their organization and function, but the cellular mechanisms regulating this process are poorly understood. Here, we show that cytoplasmic linker-associated proteins (CLASPs) suppress transitions from microtubule growth to shortening, termed catastrophes, including those induced by microtubule-destabilizing agents and physical barriers. Mammalian CLASPs encompass three TOG-like domains, TOG1, TOG2, and TOG3, none of which bind to free tubulin. TOG2 is essential for catastrophe suppression, whereas TOG3 mildly enhances rescues but cannot suppress catastrophes. These functions are inhibited by the C-terminal domain of CLASP2, while the TOG1 domain can release this auto-inhibition. TOG2 fused to a positively charged microtubule-binding peptide autonomously accumulates at growing but not shrinking ends, suppresses catastrophes, and stimulates rescues. CLASPs suppress catastrophes by stabilizing growing microtubule ends, including incomplete ones, preventing their depolymerization and promoting their recovery into complete tubes. TOG2 domain is the key determinant of these activities. CLASPs potently suppress microtubule catastrophes induced by different mechanisms CLASPs act by stabilizing growing microtubule ends, including incomplete ones CLASP2 TOG-like domain, TOG2, is necessary and sufficient for catastrophe inhibition TOG2 fused to a positively charged peptide accumulates at growing microtubule ends Aher et al. dissect the mechanisms underlying the ability of CLASPs, major microtubule-stabilizing factors in interphase and mitosis, to prevent microtubule from switching from growth to shortening. They show that the CLASP domain essential for this function does not bind to free tubulin but directly stabilizes growing microtubule ends.
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影响因子:
7.8
作者:
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通讯作者:
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影响因子:
3.3
作者:
Duellberg C;Cade NI;Surrey T
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DOI:
10.1007/978-1-61779-252-6_6
发表时间:
2011-01-01
期刊:
MICROTUBE DYNAMICS: METHODS AND PROTOCOLS
影响因子:
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通讯作者:
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
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通讯作者:
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影响因子:
11.8
作者:
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通讯作者:
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