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p21-Activated Kinase 5 (Pak5) Localizes to Mitochondria and Inhibits Apoptosis by Phosphorylating BAD
Open accessAbstract
Pak5 is the most recently identified and least understood member of the p21-activated kinase (Pak) family. This kinase is known to promote neurite outgrowth in vitro, but its localization, substrates, and effects on cell survival have not been reported. We show here that Pak5 has unique properties that distinguish it from all other members of the Pak family. First, Pak5, unlike Pak1, cannot complement an STE20 mutation in Saccharomyces cerevisiae. Second, Pak5 binds to the GTPases Cdc42 and Rac, but these GTPases do not regulate Pak5 kinase activity, which is constitutive and stronger than any other Pak. Third, Pak5 prevents apoptosis induced by camptothecin and C2-ceramide by phosphorylating BAD on Ser-112 in a protein kinase A-independent manner and prevents the localization of BAD to mitochondria, thereby inhibiting the apoptotic cascade that leads to apoptosis. Finally, we show that Pak5 itself is constitutively localized to mitochondria, and that this localization is independent of kinase activity or Cdc42 binding. These features make Pak5 unique among the Pak family and suggest that it plays an important role in apoptosis through BAD phosphorylation.
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Cited by
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Fernald, K., & Kurokawa, M. (2013) · Trends in Cell Biology · doi:10.1016/j.tcb.2013.07.006 · Cited by 579
Deacon, S. W., Beeser, A., Fukui, J. A., Rennefahrt, U. E. E., Myers, C., Chernoff, J., & Peterson, J. R. (2008) · Chemistry & Biology · doi:10.1016/j.chembiol.2008.03.005 · Cited by 366
Self-citationArias‐Romero, L. E., & Chernoff, J. (2008) · Biology of the Cell · doi:10.1042/bc20070109 · Cited by 364
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Metadata
- Authors
- Cotteret, S., Jaffer, Z. M., Beeser, A., & Chernoff, J.
- Venue
- Molecular and Cellular Biology
- Publisher
- Informa UK Limited
- Published
- 2003-08-01
- Volume
- 23
- Issue
- 16
- Pages
- 5526-5539
- ISSN
- 0270-7306 (ISSN-L)
- 1098-5549
- OpenAlex
- W2122153913
- Cited by
- 169
- References
- 0
- FWCI
- 3.32
- Type
- journal article
- Language
- en
- Open access
- green
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- Cotteret, S., Jaffer, Z. M., Beeser, A., & Chernoff, J. (2003). p21-Activated Kinase 5 (Pak5) Localizes to Mitochondria and Inhibits Apoptosis by Phosphorylating BAD. Molecular and Cellular Biology. https://doi.org/10.1128/mcb.23.16.5526-5539.2003
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