The NIMA-family kinase Nek6 phosphorylates the kinesin Eg5 at a novel site necessary for mitotic spindle formation.
The NIMA-family kinase Nek6 phosphorylates the kinesin Eg5 at a novel site necessary for mitotic spindle formation.
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DOI:
10.1242/jcs.035360
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发表时间:
2008-12-01
影响因子:
4
通讯作者:
Roig J
中科院分区:
文献类型:
--
作者:
Rapley J;Nicolàs M;Groen A;Regué L;Bertran MT;Caelles C;Avruch J;Roig J
Nek6 and Nercc1/Nek9 belong to the NIMA family of protein kinases. Nercc1 is activated in mitosis whereupon it binds, phosphorylates and activates Nek6. Interference with Nek6 or Nercc1 in mammalian cells causes prometaphase/metaphase arrest, and depletion of XNercc from Xenopus egg extracts prevents normal spindle assembly. Herein we show that Nek6 is constitutively associated with Eg5, a kinesin necessary for spindle bipolarity. Nek6 phosphorylates Eg5 at several sites in vitro, and one of these sites, Ser1033, is phosphorylated in vivo during mitosis. While Cdk1 phosphorylates nearly all Eg5 during mitosis at Thr926, Nek6 phosphorylates ~3% of Eg5, primarily at the spindle poles. Eg5 depletion arrests cells with a monopolar spindle; this can be rescued by Eg5 wildtype but not by Eg5(Thr926Ala). Eg5(Ser1033Ala) rescues half as well as wildtype whereas an Eg5(Ser1033Asp) mutant is nearly as effective. Thus Nek6 phosphorylates a subset of Eg5 polypeptides during mitosis at a conserved site, whose phosphorylation is critical for the mitotic function of Eg5.
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影响因子:
3.3
作者:
Bishop, JD;Han, ZB;Schumacher, JM
通讯作者:
Schumacher, JM
影响因子:
5.3
作者:
Rapley, J;Baxter, JE;Fry, AM
通讯作者:
Fry, AM
影响因子:
7.8
作者:
Miyamoto, David T;Perlman, Zachary E;Burbank, Kendra S;Groen, Aaron C;Mitchison, Timothy J
通讯作者:
Mitchison, Timothy J
DOI:
10.1083/jcb.200504107
发表时间:
2005-10-10
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bahe S;Stierhof YD;Wilkinson CJ;Leiss F;Nigg EA
通讯作者:
Nigg EA
DOI:
10.1073/pnas.0507066103
发表时间:
2006-04-04
影响因子:
11.1
作者:
Nousiainen, M;Silljé, HHW;Körner, R
通讯作者:
Körner, R