Autophosphorylation of PAK1,2,3
收藏reactome.org2025-03-23 收录
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Binding of PAK1, PAK2 or PAK3 to GTP-bound RAC1 or CDC42 disrupts PAK homodimers and allows PAK autophosphorylation. Autophosphorylation of a conserved threonine residue in the catalytic domain of PAKs (T423 in PAK1, T402 in PAK2 and T436 in PAK3) is necessary for the kinase activity of PAK1, PAK2 and PAK3. Autophosphorylation of PAK1 serine residue S144, PAK2 serine residue S141, and PAK3 serine residue S154 disrupts association of PAKs with RAC1 or CDC42 GTPases and enhances kinase activity (Lei et al. 2000, Chong et al. 2001, Parrini et al. 2002, Jung and Traugh 2005, Wang et al. 2011).
PAK1、PAK2或PAK3与GTP结合的RAC1或CDC42的结合会破坏PAK同源二聚体,并允许PAK自身磷酸化。PAK催化域中保守的苏氨酸残基(PAK1中的T423,PAK2中的T402和PAK3中的T436)的自身磷酸化对于PAK1、PAK2和PAK3的激酶活性是必要的。PAK1的丝氨酸残基S144、PAK2的丝氨酸残基S141和PAK3的丝氨酸残基S154的自身磷酸化会中断PAK与RAC1或CDC42 GTP酶的结合,并增强激酶活性(Lei等,2000年,Chong等,2001年,Parrini等,2002年,Jung和Traugh,2005年,Wang等,2011年)
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