Possible PhiRv2 prophage protein; Rv2655c, (MTCY441.24c), len: 475 aa. Hypothetical protein, possibly phiRv2 phage protein (putative primase-like protein) (see citation below). C-terminus similar to P22875|YXIS_SACER hypothetical 28.9 KDA protein (probably does not play a direct role in plasmid integration or excision) from Saccharopolyspora erythraea (Streptomyces erythraeus) plasmid pSE211 (263 aa), FASTA scores: opt: 389, E(): 2.7e-15, (33.45% identity in 269 aa overlap). Weak similarity in N-terminus to O06608|MTCY336.22|Rv1582c Probable phiRV1 phage protein from Mycobacterium tube [...]

Possible PhiRv2 prophage protein; Rv2656c, (MTCY441.25c), len: 130 aa. Probable phiRv2 phage protein (see Hatfull 2000), highly similar to O06607|YF83_MYCTU|Rv1583c|MT3573.2|MTCY336.21 Probable phiRV1 phage protein from Mycobacterium tuberculosis (132 aa), FASTA scores: opt: 734, E(): 2.5e-39, (81.5% identity in 131 aa overlap); and some similarity with Q982T4|MLL8506 hypothetical protein from Rhizobium loti (Mesorhizobium loti) (204 aa), FASTA scores: opt: 104, E(): 9.7, (31.85% identity in 113 aa overlap); To M.tuberculosis Rv1583c.

Rv2657c, (MTCY441.26c), len: 86 aa. Probable phiRv2 phage protein (excisionase) (see citation below), similar to O22001|VG36_BPMD2|36|G2 gene 36 protein (GP36) from Mycobacteriophage D29 (56 aa), FASTA scores: opt: 171, E(): 9.6e-06, (48.0% identity in 50 aa overlap); and Q05246|VG36_BPML5|36 gene 36 protein (GP36) from Mycobacteriophage L5 (56 aa), FASTA scores: opt: 169, E(): 1.3e-05, (50% identity in 50 aa overlap). Similarity suggests alternative start at 21737. Contains possible helix-turn-helix motif from aa 33 to 54 (Score 1655, +4.82 SD).

Probable PhiRv2 prophage integrase; Integrase is necessary for integration of the phage into the host genome by site-specific recombination. In conjunction with excisionase, integrase is also necessary for excision of the prophage from the host genome (By similarity).

Conserved hypothetical protein; Antitoxin component of a type II toxin-antitoxin (TA) system. Upon expression in M.smegmatis neutralizes the effect of cognate toxin Rv0910.

Conserved hypothetical protein; Toxic component of a type II toxin-antitoxin (TA) system. Upon expression in M.smegmatis inhibits colony formation. Its toxic effect is neutralized by coexpression with cognate antitoxin Rv0909. Does not exert its toxic effect via translation.

GDP-D-mannose dehydratase GmdA (GDP-mannose 4,6 dehydratase) (GMD); Catalyzes the conversion of GDP-D-mannose to GDP-4-dehydro-6- deoxy-D-mannose.

Rv3622c, (MTCY15C10.30), len: 99 aa. PE32, Member of the Mycobacterium tuberculosis PE family (see Brennan and Delogu, 2002), but no glycine rich C-terminus present. Similar to others e.g. O53938|Rv1788|MTV049.10 (99 aa),FASTA scores: opt: 376, E(): 7.1e-17, (65.6% identity in 96 aa overlap).

Ribonucleoside-diphosphate reductase subunit beta nrdF1; Provides the precursors necessary for DNA synthesis. Catalyzes the biosynthesis of deoxyribonucleotides from the corresponding ribonucleotides (By similarity). Two genes for this protein are present in M.tuberculosis; this is thought to not be the active form. When coexpressed in E.coli with nrdE the 2 proteins do not complement a temperature-sensitive E.coli mutant, whereas the other gene (nrdF2) does complement; Belongs to the ribonucleoside diphosphate reductase small chain family.