Serine/threonine-protein kinase PknA

UniProtKB accession:  P9WI83

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UniProtKB description:  Protein kinase that regulates many aspects of mycobacterial physiology, and is critical for growth in vitro and survival of the pathogen in the host (PubMed:25713147). Is a key component of a signal transduction pathway that regulates cell growth, cell shape and cell division via phosphorylation of target proteins such as FtsZ, Wag31, GlmU, PstP, EmbR and Rv1422 (PubMed:15985609, PubMed:16817899, PubMed:19121323, PubMed:21190553, PubMed:21423706). Also catalyzes the phosphorylation of the proteasome alpha-subunit (PrcA) and unprocessed proteasome beta-subunit (pre-PrcB), which results in the inhibition of processing of pre-PrcB and assembly of the proteasome complex, and thereby enhances the mycobacterial resistance to H(2)O(2); PknA thus plays an important role in the oxidative stress response by impeding the formation of holo-proteasome in M.tuberculosis under H(2)O(2) stress (PubMed:25224505). Shows a strong preference for Thr versus Ser as the phosphoacceptor.