Abstract:
:We identified dynein light chain 1 (DLC1) as a physiologic substrate of p21-activated kinase 1 (Pak1). Pak1-DLC1 interaction plays an essential role in cell survival, which depends on Pak1's phosphorylation of DLC1 on Ser88. Pak1 associates with the complex of DLC1 and BimL, a proapoptotic BH3-only protein, and phosphorylates both proteins. Phosphorylation of BimL by Pak1 prevents it from interacting with and inactivation of Bcl-2, an antiapoptotic protein. Overexpression of DLC1 but not DLC1-Ser88Ala mutant promotes cancerous properties of breast cancer cells. DLC1 protein level is elevated in more than 90% of human breast tumors. The regulation of cell survival functions by Pak1-DLC1 interaction represents a novel mechanism by which a signaling kinase might regulate the cancerous phenotypes.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Vadlamudi RK,Bagheri-Yarmand R,Yang Z,Balasenthil S,Nguyen D,Sahin AA,den Hollander P,Kumar Rdoi
10.1016/j.ccr.2004.05.022keywords:
subject
Has Abstractpub_date
2004-06-01 00:00:00pages
575-85issue
6eissn
1535-6108issn
1878-3686pii
S1535610804001473journal_volume
5pub_type
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