Connections of anti-tuberculosis drugs resistance and protein phosphorylation in MTB. (A) PknB mediates drug resistance/tolerance by phosphorylation; (B) Regulation of STPK genes after treatment with anti-tuberculosis drugs. EF-Tu, elongation factor Tu; EMB, ethambutol; ETO, ethionamide; GTP, guanosine-5-triphosphate; INH, isoniazid; InhA, 2-trans-enoyl-acyl carrier protein reductase; MabA, beta-ketoacyl-acyl carrier protein reductase; MurA, UDP-N-acetylglucosamine enolpyruvyle transferase; NAD+, nicotinamide adenine dinucleotide; P, phosphorylation; RIF, rifampicin; STPK, Ser/Thr protein kinase; SahH, S-adenosyl homocysteine hydrolase.