Skp-cullin-F box E3 ligase component FBXL2 ubiquitinates Aurora B to inhibit tumorigenesis.
Skp-cullin-F box E3 ligase component FBXL2 ubiquitinates Aurora B to inhibit tumorigenesis.
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DOI:
10.1038/cddis.2013.271
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发表时间:
2013-08-08
影响因子:
9
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中科院分区:
文献类型:
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Aurora B kinase is an integral regulator of cytokinesis, as it stabilizes the intercellular canal within the midbody to ensure proper chromosomal segregation during cell division. Here we identified that the ubiquitin E3 ligase complex SCFFBXL2 mediates Aurora B ubiquitination and degradation within the midbody, which is sufficient to induce mitotic arrest and apoptosis. Three molecular acceptor sites (K102, K103 and K207) within Aurora B protein were identified as important sites for its ubiquitination. A triple Lys mutant of Aurora B (K102/103/207R) exhibited optimal resistance to SCFFBXL2-directed polyubiquitination, and overexpression of this variant resulted in a significant delay in anaphase onset, resulting in apoptosis. A unique small molecule F-box/LRR-repeat protein 2 (FBXL2) activator, BC-1258, stabilized and increased levels of FBXL2 protein that promoted Aurora B degradation, resulting in tetraploidy, mitotic arrest and apoptosis of tumorigenic cells, and profoundly inhibiting tumor formation in athymic nude mice. These findings uncover a new proteolytic mechanism targeting a key regulator of cell replication that may serve as a basis for chemotherapeutic intervention in neoplasia.
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影响因子:
4
作者:
Cimini, D;Moree, B;Salmon, ED
通讯作者:
Salmon, ED
DOI:
10.1083/jcb.153.4.865
发表时间:
2001-05-14
期刊:
The Journal of cell biology
影响因子:
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通讯作者:
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3.3
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通讯作者:
Ruderman, JV
影响因子:
4.8
作者:
Agassandian, Marianna;Chen, Bill B.;Mallampalli, Rama K.
通讯作者:
Mallampalli, Rama K.
DOI:
10.1083/jcb.200208092
发表时间:
2003-04-28
期刊:
The Journal of cell biology
影响因子:
--
作者:
Hauf S;Cole RW;LaTerra S;Zimmer C;Schnapp G;Walter R;Heckel A;van Meel J;Rieder CL;Peters JM
通讯作者:
Peters JM