Rv1973, (MTV051.11), len: 160 aa. Possible conserved Mce-associated membrane protein. Probably part of mce3 operon. Similar to several other proteins from Mycobacterium tuberculosis e.g. Rv1362c|Z75555|MTCY02B10.26C (220 aa), FASTA scores: opt: 378, E(): 2.8e-19, (50.0% identity in 128 aa overlap); Rv1363c; Rv0177 (near Mce operon 1); etc. Contains possible N-terminal signal sequence or membrane anchor. Predicted to be an outer membrane protein (See Song et al., 2008).

Probable DNA repair protein RecN (recombination protein N); May be involved in recombinational repair of damaged DNA.

Probable integrase/recombinase; Site-specific tyrosine recombinase, which acts by catalyzing the cutting and rejoining of the recombining DNA molecules. The XerC- XerD complex is essential to convert dimers of the bacterial chromosome into monomers to permit their segregation at cell division. It also contributes to the segregational stability of plasmids. Belongs to the 'phage' integrase family. XerD subfamily.

Probable CTP synthase PyrG; Catalyzes the ATP-dependent amination of UTP to CTP with either L-glutamine or ammonia as the source of nitrogen. Is essential for M.tuberculosis growth in vitro and ex vivo. Regulates intracellular CTP levels through interactions with the four ribonucleotide triphosphates (By similarity).

NUDIX hydrolase; Rv1700, (MTCI125.22), len: 207 aa. Nudix hydrolase,equivalent to Q49891|MLC1351.08C|Z95117 Hypothetical protein from Mycobacterium leprae (177 aa), FASTA scores: (66.7% identity in 171 aa overlap); also similar to Q9S225|SCI51.15C|AL109848 Hypothetical protein from Streptomyces coelicolor (211 aa), FASTA scores: opt: 508,E(): 1.2e-27, (43.1% identity in 197 aa overlap); similar to P54570|ADPP_BACSU ADP-ribose pyrophosphatase (185 aa),FASTA scores: opt: 313, E(): 1.1e-06, (42.7% identity in 124 aa overlap). Belongs to the family of Nudix hydrolases.

Hypothetical protein; Rv1351, (MTCY02B10.15), len: 109 aa. Hypothetical unknown protein. Predicted to be an outer membrane protein (See Song et al., 2008). This region is a possible MT-complex-specific genomic island (See Becq et al.,2007).

Outer membrane protein A OmpA; Probably plays a role in ammonia secretion that neutralizes the medium at pH 5.5, although it does not play a direct role in ammonia transport. The OmpA-like domain (196-326) binds M.tuberculosis peptidoglycan. Overexpression in M.bovis or M.smegmatis gives channels with average conductance value of 1,600 +/- 100 pS, but this may not be physiologically relevant; Belongs to the outer membrane OOP (TC 1.B.6) superfamily. ArfA family.

Inorganic polyphosphate/ATP-NAD kinase PpnK (poly(P)/ATP NAD kinase); Involved in the regulation of the intracellular balance of NAD and NADP, and is a key enzyme in the biosynthesis of NADP. Catalyzes specifically the phosphorylation on 2'-hydroxyl of the adenosine moiety of NAD to yield NADP. It can use ATP and other nucleoside triphosphates as well as inorganic polyphosphate (poly(P)) as a source of phosphorus.

2'-O-methyltransferase TlyA; Acts as a host evasion factor, that significantly contributes to the pathogenesis of M.tuberculosis by modulating adaptive immune responses by inhibiting host-protective Th1 and Th17 cytokine responses as well as autophagy. Catalyzes the 2'-O-methylation at nucleotides C1409 in 16S rRNA and C1920 in 23S rRNA. Is likely involved in ribosomal biogenesis. Also exhibits hemolytic activity in vitro, by binding with and oligomerizing into host cell membranes. Belongs to the TlyA family.