Conserved hypothetical protein; Binds to RNA polymerase (RNAP), probably stimulating transcriptions from principal, but not alternative sigma factor promoters (By similarity). Partially restores transcription in the presence of rifampicin (Rif) in vitro; overexpression leads to an increase in the Rif tolerance in vivo, with smaller colonies. Seems to act by removing Rif from its binding site and preventing its further binding. No longer stimulates transcription in Rif-resistant RNA polymerase (with mutations in rpoB).

DNA-directed RNA polymerase, omega subunit; Promotes RNA polymerase assembly. Latches the N- and C- terminal regions of the beta' subunit thereby facilitating its interaction with the beta and alpha subunits.

Twin arginine-targeting protein translocase, TatA/E family protein; Part of the twin-arginine translocation (Tat) system that transports large folded proteins containing a characteristic twin- arginine motif in their signal peptide across membranes. TatA could form the protein-conducting channel of the Tat system.

DNA-directed RNA polymerase, beta subunit; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. This subunit often mutates to generate rifampicin (Rif) resistance. Interaction with RbpA partially restores Rif-inhibited transcription; once the subunit is Rif-resistant however RbpA no longer stimulates transcription.

Sigma factor MysA; Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This sigma factor is the primary sigma factor during exponential growth.

DNA-directed RNA polymerase, beta' subunit; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.

DNA-directed RNA polymerase, alpha subunit; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.

Conserved hypothetical protein; When present on multicopy plasmids confers increased resistance to fluoroquinolone antibiotics such as ciprofloxacin and sparfloxacin but not the quinolone nalidixic acid. Forms a structure that exhibits size, shape and electrostatic similarity to B-form DNA; it may bind to DNA gyrase which is postulated to protect it from fluoroquinolones (By similarity). Belongs to the pentapeptide repeat protein family.

Proteasome alpha subunit; Component of the proteasome core, a large protease complex with broad specificity involved in protein degradation. The M.smegmatis proteasome is able to cleave oligopeptides after hydrophobic residues, thus displaying chymotrypsin-like activity. In complex with the ATPase Mpa, degrades protein targets conjugated to a prokaryotic ubiquitin- like protein (Pup). Identified substrates of the M.smegmatis proteasome are the pupylated SodA and Ino1 proteins. The Pup- proteasome system (PPS) is essential for survival under starvation; PPS likely functions to recycle a [...]