期刊
CELL ADHESION & MIGRATION
卷 8, 期 1, 页码 49-54出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/cam.27480
关键词
Rac1; HACE1; PIP5K1C; HECTD1; RhoA
类别
资金
- American Cancer Society Research Scholar Grant [RSG-13-184-01-CSM]
- American Cancer Society Institutional Research Grant [IRG 85-001-22]
- Markey Cancer Center, University of Kentucky
- China Scholarship council
Recent discoveries have unveiled the roles of a complicated network of E3 ubiquitin ligases in regulating cell migration machineries. The E3 ubiquitin ligases Smurf1 and Cul/BACURD ubiquitinate RhoA to regulate stress fiber formation and cell polarity, and ASB2 alpha ubiquitinates filamins to modulate cytoskeletal stiffness, thus regulating cell spreading and cell migration. HACE1, XIAP, and Skp1-Cul1-F-box bind to Rac1 and cause its ubiquitination and degradation, thus suppressing lamellipodium protrusions, while PIAS3, a SUMO ligase, activates Rac1 to promote lamellipodium dynamics. Smurf1 also enhances Rac1 activation but it does not ubiquitinate Rac1. Both Smurf1 and HECTD1 regulate focal adhesion (FA) assembly and (or) disassembly through ubiquitinating the talin head domain and phosphatidylinositol 4 phosphate 5-kinase type I gamma (PIPKI gamma 90), respectively. Thus, E3 ubiquitin ligases regulate stress fiber formation, cell polarity, lamellipodium protrusions, and FA dynamics through ubiquitinating the key proteins that control these processes.
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