Augmin: a protein complex required for centrosome-independent microtubule generation within the spindle.
Augmin: a protein complex required for centrosome-independent microtubule generation within the spindle.
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DOI:
10.1083/jcb.200711053
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发表时间:
2008-05-05
影响因子:
7.8
通讯作者:
Vale, Ronald D.
中科院分区:
文献类型:
--
作者:
Goshima, Gohta;Mayer, Mirjam;Zhang, Nan;Stuurman, Nico;Vale, Ronald D.
Since the discovery of γ-tubulin, attention has focused on its involvement as a microtubule nucleator at the centrosome. However, mislocalization of γ-tubulin away from the centrosome does not inhibit mitotic spindle formation in Drosophila melanogaster, suggesting that a critical function for γ-tubulin might reside elsewhere. A previous RNA interference (RNAi) screen identified five genes (Dgt2–6) required for localizing γ-tubulin to spindle microtubules. We show that the Dgt proteins interact, forming a stable complex. We find that spindle microtubule generation is substantially reduced after knockdown of each Dgt protein by RNAi. Thus, the Dgt complex that we name “augmin” functions to increase microtubule number. Reduced spindle microtubule generation after augmin RNAi, particularly in the absence of functional centrosomes, has dramatic consequences on mitotic spindle formation and function, leading to reduced kinetochore fiber formation, chromosome misalignment, and spindle bipolarity defects. We also identify a functional human homologue of Dgt6. Our results suggest that an important mitotic function for γ-tubulin may lie within the spindle, where augmin and γ-tubulin function cooperatively to amplify the number of microtubules.
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DOI:
10.1083/jcb.99.3.1066
发表时间:
1984-09
期刊:
The Journal of cell biology
影响因子:
--
作者:
Salmon ED;McKeel M;Hays T
通讯作者:
Hays T
影响因子:
3.3
作者:
Goshima, G;Vale, RD
通讯作者:
Vale, RD
影响因子:
9.2
作者:
Groen, AC;Cameron, LA;Ohi, R
通讯作者:
Ohi, R
影响因子:
64.5
作者:
Li, KJ;Kaufman, TC
通讯作者:
Kaufman, TC
DOI:
10.1083/jcb.99.6.2165
发表时间:
1984-12
期刊:
The Journal of cell biology
影响因子:
--
作者:
Salmon ED;Leslie RJ;Saxton WM;Karow ML;McIntosh JR
通讯作者:
McIntosh JR