Ect2 and MgcRacGAP regulate the activation and function of Cdc42 in mitosis.
Ect2 and MgcRacGAP regulate the activation and function of Cdc42 in mitosis.
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ECT2和MGCRACGAP调节Cdc42在有丝分裂中的激活和功能。
DOI:
10.1083/jcb.200408085
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发表时间:
2005-01-17
影响因子:
7.8
通讯作者:
Narumiya, S
中科院分区:
文献类型:
--
作者:
Oceguera-Yanez, F;Kimura, K;Yasuda, S;Higashida, C;Kitamura, T;Hiraoka, Y;Haraguchi, T;Narumiya, S
Although Rho regulates cytokinesis, little was known about the functions in mitosis of Cdc42 and Rac. We recently suggested that Cdc42 works in metaphase by regulating bi-orient attachment of spindle microtubules to kinetochores. We now confirm the role of Cdc42 by RNA interference and identify the mechanisms for activation and down-regulation of Cdc42. Using a pull-down assay, we found that the level of GTP-Cdc42 elevates in metaphase, whereas the level of GTP-Rac does not change significantly in mitosis. Overexpression of dominant-negative mutants of Ect2 and MgcRacGAP, a Rho GTPase guanine nucleotide exchange factor and GTPase activating protein, respectively, or depletion of Ect2 by RNA interference suppresses this change of GTP-Cdc42 in mitosis. Depletion of Ect2 also impairs microtubule attachment to kinetochores and causes prometaphase delay and abnormal chromosomal segregation, as does depletion of Cdc42 or expression of the Ect2 and MgcRacGAP mutants. These results suggest that Ect2 and MgcRacGAP regulate the activation and function of Cdc42 in mitosis.
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影响因子:
7.8
作者:
Jantsch-Plunger, V;Gonczy, P;Romano, A;Schnabel, H;Hamill, D;Schnabel, R;Hyman, A A;Glotzer, M
通讯作者:
Glotzer, M
DOI:
10.1083/jcb.120.5.1187
发表时间:
1993-03
期刊:
The Journal of cell biology
影响因子:
--
作者:
Kishi K;Sasaki T;Kuroda S;Itoh T;Takai Y
通讯作者:
Takai Y
影响因子:
4.8
作者:
Ban, R;Irino, Y;Tanaka, H
通讯作者:
Tanaka, H
影响因子:
64.5
作者:
Etienne-Manneville, S;Hall, A
通讯作者:
Hall, A
影响因子:
11.8
作者:
Somers, WG;Saint, R
通讯作者:
Saint, R