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P21 protein (Cdc42/Rac)-activated kinase 2
Protein PAK2 PDB 1e0a.png
PDB rendering based on 1e0a.
Available structures
PDB Ortholog search: PDBe, RCSB
Symbols PAK2 ; PAK65; PAKgamma
External IDs OMIM605022 MGI1339984 HomoloGene99711 ChEMBL: 4487 GeneCards: PAK2 Gene
EC number
RNA expression pattern
PBB GE PAK2 208875 s at tn.png
PBB GE PAK2 208876 s at tn.png
PBB GE PAK2 208877 at tn.png
More reference expression data
Species Human Mouse
Entrez 5062 224105
Ensembl ENSG00000180370 ENSMUSG00000022781
UniProt Q13177 Q8CIN4
RefSeq (mRNA) NM_002577 NM_177326
RefSeq (protein) NP_002568 NP_796300
Location (UCSC) Chr 3:
196.47 – 196.56 Mb
Chr 16:
32.02 – 32.08 Mb
PubMed search [1] [2]

Serine/threonine-protein kinase PAK 2 is an enzyme that in humans is encoded by the PAK2 gene.[1][2]

The p21 activated kinases (PAK) are critical effectors that link Rho GTPases to cytoskeleton reorganization and nuclear signaling. The PAK proteins are a family of serine/threonine kinases that serve as targets for the small GTP binding proteins, CDC42 and RAC1, and have been implicated in a wide range of biological activities. The protein encoded by this gene is activated by proteolytic cleavage during caspase-mediated apoptosis, and may play a role in regulating the apoptotic events in the dying cell.[3]


PAK2 has been shown to interact with SH3KBP1,[4] CDC42[5][6][7] and Abl gene.[8]


  1. ^ Martin GA, Bollag G, McCormick F, Abo A (June 1995). "A novel serine kinase activated by rac1/CDC42Hs-dependent autophosphorylation is related to PAK65 and STE20". EMBO J 14 (9): 1970–8. PMC 398296. PMID 7744004. 
  2. ^ Knaus UG, Morris S, Dong HJ, Chernoff J, Bokoch GM (August 1995). "Regulation of human leukocyte p21-activated kinases through G protein--coupled receptors". Science 269 (5221): 221–3. doi:10.1126/science.7618083. PMID 7618083. 
  3. ^ "Entrez Gene: PAK2 p21 (CDKN1A)-activated kinase 2". 
  4. ^ Kurakin, Alexei V; Wu Susan, Bredesen Dale E (September 2003). "Atypical recognition consensus of CIN85/SETA/Ruk SH3 domains revealed by target-assisted iterative screening". J. Biol. Chem. (United States) 278 (36): 34102–9. doi:10.1074/jbc.M305264200. ISSN 0021-9258. PMID 12829691. 
  5. ^ Stevens, W K; Vranken W, Goudreau N, Xiang H, Xu P, Ni F (May 1999). "Conformation of a Cdc42/Rac interactive binding peptide in complex with Cdc42 and analysis of the binding interface". Biochemistry (UNITED STATES) 38 (19): 5968–75. doi:10.1021/bi990426u. ISSN 0006-2960. PMID 10320322. 
  6. ^ Abo, A; Qu J, Cammarano M S, Dan C, Fritsch A, Baud V, Belisle B, Minden A (November 1998). "PAK4, a novel effector for Cdc42Hs, is implicated in the reorganization of the actin cytoskeleton and in the formation of filopodia". EMBO J. (ENGLAND) 17 (22): 6527–40. doi:10.1093/emboj/17.22.6527. ISSN 0261-4189. PMC 1171000. PMID 9822598. 
  7. ^ Zhang, B; Chernoff J, Zheng Y (April 1998). "Interaction of Rac1 with GTPase-activating proteins and putative effectors. A comparison with Cdc42 and RhoA". J. Biol. Chem. (UNITED STATES) 273 (15): 8776–82. doi:10.1074/jbc.273.15.8776. ISSN 0021-9258. PMID 9535855. 
  8. ^ Roig, J; Tuazon P T, Zipfel P A, Pendergast A M, Traugh J A (December 2000). "Functional interaction between c-Abl and the p21-activated protein kinase γ-PAK". Proc. Natl. Acad. Sci. U.S.A. (UNITED STATES) 97 (26): 14346–51. doi:10.1073/pnas.97.26.14346. ISSN 0027-8424. PMC 18921. PMID 11121037. 

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