cd06609: STKc_MST3_like (this model, PSSM-Id:132940 is obsolete and has been replaced by 270786)
Catalytic domain of Mammalian Ste20-like protein kinase 3-like Protein Serine/Threonine Kinases
Serine/threonine kinases (STKs), mammalian Ste20-like protein kinase 3 (MST3)-like subfamily, catalytic (c) domain. STKs catalyze the transfer of the gamma-phosphoryl group from ATP to serine/threonine residues on protein substrates. The MST3-like subfamily is part of a larger superfamily that includes the catalytic domains of other protein STKs, protein tyrosine kinases, RIO kinases, aminoglycoside phosphotransferase, choline kinase, and phosphoinositide 3-kinase. This subfamily is composed of MST3, MST4, STK25, Schizosaccharomyces pombe Nak1 and Sid1, Saccharomyces cerevisiae sporulation-specific protein 1 (SPS1), and related proteins. Nak1 is required by fission yeast for polarizing the tips of actin cytoskeleton and is involved in cell growth, cell separation, cell morphology and cell-cycle progression. Sid1 is a component in the septation initiation network (SIN) signaling pathway, and plays a role in cytokinesis. SPS1 plays a role in regulating proteins required for spore wall formation. MST4 plays a role in mitogen-activated protein kinase (MAPK) signaling during cytoskeletal rearrangement, morphogenesis, and apoptosis. MST3 phosphorylates the STK NDR and may play a role in cell cycle progression and cell morphology. STK25 may play a role in the regulation of cell migration and polarization.
Comment:The active site is composed of the ATP binding site and the substrate binding site. The substrate binding site is based on the binding of human PAK4 to a consensus peptide.
Lu S et al.(2020). "CDD/SPARCLE: the conserved domain database in 2020.",