Probable transposase (fragment); Rv1035c, (MTCY10G2.14), len: 228 aa. Probable IS1560 transposase fragment, similar to parts of Rv3387|E1202305|MTV004.45 (225 aa) (47.8% identity in 67 aa overlap) and Rv3386|E1202304|MTV004.44 (234 aa) (55.1% identity in 127 aa overlap).

Rv1036c, (MTCY10G2.13), len: 112 aa. Probable IS1560 transposase fragment, similar to part of Rv3386|E1202304|MTV004.44 (234 aa) (82.8% identity in 87 aa overlap).

Possible toxin VapC26. Contains PIN domain; Toxic component of a type II toxin-antitoxin (TA) system. An RNase (By similarity). Upon expression in M.smegmatis inhibits colony formation. Its toxic effect is neutralized by coexpression with cognate antitoxin VapB26.; Belongs to the PINc/VapC protein family.

Possible toxin MazF4; Toxic component of a type II toxin-antitoxin (TA) system. Acts as an endoribonuclease (mRNA interferase) on single-strand mRNA, cleaving between the first and second bases in the sequence UCGCU. Overexpression in M.smegmatis but not E.coli inhibits growth, this effect is neutralized by coexpression with cognate toxin MazE4. Belongs to the PemK/MazF family.

Hypothetical protein; Rv0790c, (MTCY369.34c), len: 242 aa. Hypothetical unknown protein.

Rv2086, (MTCY49.25), len: 201 aa. Conserved hypothetical protein, similarity to but shorter than many transposases but we can find no sequence errors to account for the frameshifts. Start changed since first submission (-16 aa). This region is a possible MT-complex-specific genomic island (See Becq et al., 2007).

Possible toxin VapC20; Toxic component of a type II toxin-antitoxin (TA) system. An endoribonuclease that cleaves both E.coli and M.smegmatis 23S rRNA between G2661 and A2662 in the sarcin-ricin loop (SRL, E.coli 23S rRNA numbering). The SRL sequence is highly conserved and is implicated in GTP hydrolysis by EF-Tu and EF-G. Acts on purified ribosomes but not on isolated RNA in E.coli, nor on a shortened artificial substrate. Upon expression in E.coli inhibits cell growth, colony formation and translation. Its toxic effect is neutralized by coexpression, or subsequent expression (tested [...]

Rv1033c, (MTCY10G2.16), len: 257 aa. TrcR,two-component regulatory protein (see citations below),similar to Q50825 two component response regulator from Mycobacterium tuberculosis (234 aa), FASTA scores: opt: 628, E(): 0, (46.0% identity in 226 aa overlap). Note that in vitro autophosphorylation of TrcS requires the presence of Mn2+or Ca2+as a divalent cation cofactor and subsequent transphosphorylation of TrcR is evident in the presence of TrcS-phosphate and Ca2+.

Rv1032c, (MTCY10G2.17), len: 509 aa. TrcS, two component sensor histidine kinase protein (see citations below), similar to YV16_MYCLE|P54883 probable sensor-like histidine kinase from Mycobacterium leprae (443 aa), FASTA scores: opt: 392, E(): 3.8e-18, (31.7% identity in 334 aa overlap). Note that in vitro autophosphorylation of TrcS requires the presence of Mn2+ or Ca2+ as a divalent cation cofactor and subsequent transphosphorylation of TrcR is evident in the presence of TrcS-phosphate and Ca2+.