Plays an important role in slowing down the growth of mycobacteria within the infected host. ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Autophosphorylated at serine and threonine residues. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family.