Rv1049, (MTV017.02), len: 148 aa. Probable transcriptional repressor protein, similar to many e.g. P74870 negative regulator of EMR locus EMR from Salmonella typhimurium (149 aa), FASTA scores: opt: 146, E(): 0.0011,(31.6% identity in 95 aa overlap). Contains probable helix-turn-helix motif at aa 58-79 (Score 1495, +4.28 SD). This region is a possible MT-complex-specific genomic island (See Becq et al., 2007).

Transcriptional regulatory protein KstR (probably TetR-family); Controls the expression of genes used for utilizing diverse lipids as energy sources.

Rv3492c, (MTCY13E12.45c), len: 160 aa. Conserved hypothetical Mce-associated protein, showing some similarity to hypothetical Mycobacterium tuberculosis proteins e.g. O53974|Rv1973|MTV051.11 (near Mce operon 3) (160 aa), FASTA scores: opt: 214, E(): 2.6e-07, (25.3% identity in 154 aa overlap); and Q11032|YD62_MYCTU|Rv1362c|MT1407|MTCY02B10.26c (220 aa),FASTA scores: opt: 187, E(): 2e-05, (23.4% identity in 154 aa overlap). Contains lipocalin signature at C-terminus (PS00213). Predicted to be an outer membrane protein (See Song et al., 2008).

Probable cytochrome P450 125 Cyp125; Involved in the utilization of cholesterol as the sole carbon and energy source by degrading the side chain during infection. Primarily catalyzes the sequential oxidation of the terminal methyl of cholest-4-en-3-one into (25S)-26- hydroxycholest-4-en-3-one (alcohol), (25S)-26-oxocholest-4-en-3-one (aldehyde), to finally yield the carboxylic acid (25S)-3-oxocholest-4- en-26-oate. Also able to sequentially oxidize cholesterol itself, not only cholest-4-en- 3-one. Belongs to the cytochrome P450 family.

Rv3492c, (MTCY13E12.45c), len: 160 aa. Conserved hypothetical Mce-associated protein, showing some similarity to hypothetical Mycobacterium tuberculosis proteins e.g. O53974|Rv1973|MTV051.11 (near Mce operon 3) (160 aa), FASTA scores: opt: 214, E(): 2.6e-07, (25.3% identity in 154 aa overlap); and Q11032|YD62_MYCTU|Rv1362c|MT1407|MTCY02B10.26c (220 aa),FASTA scores: opt: 187, E(): 2e-05, (23.4% identity in 154 aa overlap). Contains lipocalin signature at C-terminus (PS00213). Predicted to be an outer membrane protein (See Song et al., 2008).

Probable NADH dehydrogenase I (chain A) NuoA (NADH-ubiquinone oxidoreductase chain A); NDH-1 shuttles electrons from NADH, via FMN and iron-sulfur (Fe-S) centers, to quinones in the respiratory chain. The immediate electron acceptor for the enzyme in this species is believed to be a menaquinone. Couples the redox reaction to proton translocation (for every two electrons transferred, four hydrogen ions are translocated across the cytoplasmic membrane), and thus conserves the redox energy in a proton gradient; Belongs to the complex I subunit 3 family.

Rv3492c, (MTCY13E12.45c), len: 160 aa. Conserved hypothetical Mce-associated protein, showing some similarity to hypothetical Mycobacterium tuberculosis proteins e.g. O53974|Rv1973|MTV051.11 (near Mce operon 3) (160 aa), FASTA scores: opt: 214, E(): 2.6e-07, (25.3% identity in 154 aa overlap); and Q11032|YD62_MYCTU|Rv1362c|MT1407|MTCY02B10.26c (220 aa),FASTA scores: opt: 187, E(): 2e-05, (23.4% identity in 154 aa overlap). Contains lipocalin signature at C-terminus (PS00213). Predicted to be an outer membrane protein (See Song et al., 2008).

Probable polyketide synthase Pks1; May play a role in phthiocerol biosynthesis.

Rv3492c, (MTCY13E12.45c), len: 160 aa. Conserved hypothetical Mce-associated protein, showing some similarity to hypothetical Mycobacterium tuberculosis proteins e.g. O53974|Rv1973|MTV051.11 (near Mce operon 3) (160 aa), FASTA scores: opt: 214, E(): 2.6e-07, (25.3% identity in 154 aa overlap); and Q11032|YD62_MYCTU|Rv1362c|MT1407|MTCY02B10.26c (220 aa),FASTA scores: opt: 187, E(): 2e-05, (23.4% identity in 154 aa overlap). Contains lipocalin signature at C-terminus (PS00213). Predicted to be an outer membrane protein (See Song et al., 2008).

Polyketide synthase Pks2; Catalyzes the synthesis of the hepta- and octamethyl phthioceranic acids and/or hydroxyphthioceranic acids that are the major acyl constituents of sulfolipids.

Rv3492c, (MTCY13E12.45c), len: 160 aa. Conserved hypothetical Mce-associated protein, showing some similarity to hypothetical Mycobacterium tuberculosis proteins e.g. O53974|Rv1973|MTV051.11 (near Mce operon 3) (160 aa), FASTA scores: opt: 214, E(): 2.6e-07, (25.3% identity in 154 aa overlap); and Q11032|YD62_MYCTU|Rv1362c|MT1407|MTCY02B10.26c (220 aa),FASTA scores: opt: 187, E(): 2e-05, (23.4% identity in 154 aa overlap). Contains lipocalin signature at C-terminus (PS00213). Predicted to be an outer membrane protein (See Song et al., 2008).

Phenolpthiocerol synthesis type-I polyketide synthase PpsC; Involved in the elongation of either C22-24 fatty acids by the addition of malonyl-CoA and methylmalonyl-CoA extender units to yield phthiocerol derivatives.

Secreted L-alanine dehydrogenase Ald (40 kDa antigen) (TB43); Catalyzes the reversible reductive amination of pyruvate to L-alanine. However, since the physiological environment of M.tuberculosis has a neutral pH, it can be assumed that the enzyme catalyzes exclusively the formation of L-alanine. May play a role in cell wall synthesis as L-alanine is an important constituent of the peptidoglycan layer; Belongs to the AlaDH/PNT family.

Two component transcriptional regulatory protein DevR (probably LuxR/UhpA-family); Member of the two-component regulatory system DevR/DevS (also called DosR/DosS) involved in onset of the dormancy response. Regulates an approximately 48-member regulon. When phosphorylated binds and activates the promoter of DevR regulon genes in response to hypoxia. The presence of target DNA increases stability of phospho-DevR in vitro. Activates its own transcription under hypoxic but not aerobic conditions, probably binds as a dimer to tandem binding sites within the devR and hspX promoters. Accepts [...]

Secreted L-alanine dehydrogenase Ald (40 kDa antigen) (TB43); Catalyzes the reversible reductive amination of pyruvate to L-alanine. However, since the physiological environment of M.tuberculosis has a neutral pH, it can be assumed that the enzyme catalyzes exclusively the formation of L-alanine. May play a role in cell wall synthesis as L-alanine is an important constituent of the peptidoglycan layer; Belongs to the AlaDH/PNT family.

Probable methylcitrate synthase PrpC; Involved in the catabolism of short chain fatty acids (SCFA) via the tricarboxylic acid (TCA)(acetyl degradation route) and via the 2-methylcitrate cycle I (propionate degradation route). Catalyzes the Claisen condensation of propionyl-CoA and oxaloacetate (OAA) to yield 2-methylcitrate (2-MC) and CoA. Also catalyzes the condensation of oxaloacetate with acetyl-CoA.

Probable acetylglutamate kinase ArgB; Catalyzes the ATP-dependent phosphorylation of N-acetyl-L- glutamate.

Probable ornithine carbamoyltransferase, anabolic ArgF; Reversibly catalyzes the transfer of the carbamoyl group from carbamoyl phosphate (CP) to the N(epsilon) atom of ornithine (ORN) to produce L-citrulline, which is a substrate for argininosuccinate synthetase, the enzyme involved in the final step in arginine biosynthesis; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. OTCase family.

Probable acetylglutamate kinase ArgB; Catalyzes the ATP-dependent phosphorylation of N-acetyl-L- glutamate.

Rv0972c, (MTCY10D7.02), len: 388 aa. fadE12,acyl-CoA dehydrogenase, highly similar to many e.g. CAB95893.1|AL359988 putative acyl CoA dehydrogenase from Streptomyces coelicolor (382 aa); P45857|ACDB_BACSU from Bacillus subtilis (379 aa), FASTA scores: opt: 576, E(): 2.3e-26, (29.7% identity in 381 aa overlap); etc.

Probable acetylglutamate kinase ArgB; Catalyzes the ATP-dependent phosphorylation of N-acetyl-L- glutamate.

Rv1600, (MTCY336.04c), len: 380 aa. Probable hisC1,histidinol-phosphate aminotransferase O06591. Similar to many e.g. HIS8_STRCO|P16246 from Streptomyces coelicolor (369 aa), FASTA results: opt: 1353, E(): 0, (59.0% identity in 356 aa overlap). Some similarity to other Mycobacterium tuberculosis aminotransferases e.g. Rv3772|MTCY13D12.06,FASTA results: E(): 7.4e-25, (33.7% identity in 365 aa overlap). Contains aminotransferases class-II pyridoxal-phosphate attachment site (PS00599). Belongs to class-II of pyridoxal-phosphate-dependent aminotransferases. Note that previously known as hisC.

Probable ornithine carbamoyltransferase, anabolic ArgF; Reversibly catalyzes the transfer of the carbamoyl group from carbamoyl phosphate (CP) to the N(epsilon) atom of ornithine (ORN) to produce L-citrulline, which is a substrate for argininosuccinate synthetase, the enzyme involved in the final step in arginine biosynthesis; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. OTCase family.

Probable acetylglutamate kinase ArgB; Catalyzes the ATP-dependent phosphorylation of N-acetyl-L- glutamate.

Probable ornithine carbamoyltransferase, anabolic ArgF; Reversibly catalyzes the transfer of the carbamoyl group from carbamoyl phosphate (CP) to the N(epsilon) atom of ornithine (ORN) to produce L-citrulline, which is a substrate for argininosuccinate synthetase, the enzyme involved in the final step in arginine biosynthesis; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. OTCase family.

Rv0972c, (MTCY10D7.02), len: 388 aa. fadE12,acyl-CoA dehydrogenase, highly similar to many e.g. CAB95893.1|AL359988 putative acyl CoA dehydrogenase from Streptomyces coelicolor (382 aa); P45857|ACDB_BACSU from Bacillus subtilis (379 aa), FASTA scores: opt: 576, E(): 2.3e-26, (29.7% identity in 381 aa overlap); etc.

Probable ornithine carbamoyltransferase, anabolic ArgF; Reversibly catalyzes the transfer of the carbamoyl group from carbamoyl phosphate (CP) to the N(epsilon) atom of ornithine (ORN) to produce L-citrulline, which is a substrate for argininosuccinate synthetase, the enzyme involved in the final step in arginine biosynthesis; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. OTCase family.

Rv1600, (MTCY336.04c), len: 380 aa. Probable hisC1,histidinol-phosphate aminotransferase O06591. Similar to many e.g. HIS8_STRCO|P16246 from Streptomyces coelicolor (369 aa), FASTA results: opt: 1353, E(): 0, (59.0% identity in 356 aa overlap). Some similarity to other Mycobacterium tuberculosis aminotransferases e.g. Rv3772|MTCY13D12.06,FASTA results: E(): 7.4e-25, (33.7% identity in 365 aa overlap). Contains aminotransferases class-II pyridoxal-phosphate attachment site (PS00599). Belongs to class-II of pyridoxal-phosphate-dependent aminotransferases. Note that previously known as hisC.

Probable ornithine carbamoyltransferase, anabolic ArgF; Reversibly catalyzes the transfer of the carbamoyl group from carbamoyl phosphate (CP) to the N(epsilon) atom of ornithine (ORN) to produce L-citrulline, which is a substrate for argininosuccinate synthetase, the enzyme involved in the final step in arginine biosynthesis; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. OTCase family.

Rv0753c, (MTV041.27c), len: 510 aa. Probable mmsA,methylmalonic acid semialdehyde dehydrogenase, highly similar to others e.g. NP_420115.1|NC_002696 putative methylmalonate-semialdehyde dehydrogenase from Caulobacter crescentus (499 aa); L48550|STMMSDA_1|CAB75315.1|AL139164 methylmalonic acid semialdehyde dehydrogenase from Streptomyces coelicolor (500 aa), FASTA score: (51.6% identity in 498 aa overlap); M84911|PSEMMSRAB_2|NP_252260.1|NC_002516 methylmalonate-semialdehyde dehydrogenase from Pseudomonas aeruginosa (497 aa), FASTA scores: opt: 1127, E(): 0,(47.9% identity in 507 aa over [...]

Probable biotin synthetase BioB; Catalyzes the conversion of dethiobiotin (DTB) to biotin by the insertion of a sulfur atom into dethiobiotin via a radical-based mechanism.

Dethiobiotin synthetase BioD; Catalyzes a mechanistically unusual reaction, the ATP- dependent insertion of CO2 between the N7 and N8 nitrogen atoms of 7,8- diaminopelargonic acid (DAPA) to form an ureido ring. Belongs to the dethiobiotin synthetase family.

Dethiobiotin synthetase BioD; Catalyzes a mechanistically unusual reaction, the ATP- dependent insertion of CO2 between the N7 and N8 nitrogen atoms of 7,8- diaminopelargonic acid (DAPA) to form an ureido ring. Belongs to the dethiobiotin synthetase family.

Probable biotin synthetase BioB; Catalyzes the conversion of dethiobiotin (DTB) to biotin by the insertion of a sulfur atom into dethiobiotin via a radical-based mechanism.

Probable branched-chain keto acid dehydrogenase E1 component, alpha subunit BkdA; Component of the branched-chain alpha-ketoacid dehydrogenase (BCKADH) complex, that catalyzes the overall conversion of branched- chain alpha-ketoacids to acyl-CoA and CO(2).

Phosphoenolpyruvate carboxykinase [GTP]; Involved in the gluconeogenesis, in growth on fatty acids and is important for initiation of infection in the macrophages. Catalyzes the GTP-dependent conversion of oxaloacetate (OAA) to phosphoenolpyruvate (PEP), the rate-limiting step in the metabolic pathway that produces glucose from lactate and other precursors derived from the citric acid cycle; Belongs to the phosphoenolpyruvate carboxykinase [GTP] family.

Integral membrane cytochrome D ubiquinol oxidase CydA; Rv1623c, (MTCY01B2.15c), len: 485 aa. Probable cydA (previously known as appC, but renamed cydA to conform with Mycobacterium smegmatis nomenclature), cytochrome D ubiquinol oxidase subunit I, integral membrane protein,similar to others e.g. P26459|APPC_ECOLI|CYXA|CBDA|B0978 cytochrome BD-II oxidase subunit I from Escherichia coli strain K12 (514 aa), FASTA scores: opt: 870, E(): 0, (35.9% identity in 485 aa overlap); AL034355|SCD78_12 from Streptomyces coelicolor (501 aa), FASTA scores: opt: 1099,E(): 0, (48.6% identity in 510 aa [...]

Respiratory nitrate reductase (alpha chain) NarG; The alpha chain is the actual site of nitrate reduction (Probable). Supports anaerobic growth of E.coli on glycerol in an E.coli mutant lacking endogenous nitrate reductase.

Integral membrane cytochrome D ubiquinol oxidase CydA; Rv1623c, (MTCY01B2.15c), len: 485 aa. Probable cydA (previously known as appC, but renamed cydA to conform with Mycobacterium smegmatis nomenclature), cytochrome D ubiquinol oxidase subunit I, integral membrane protein,similar to others e.g. P26459|APPC_ECOLI|CYXA|CBDA|B0978 cytochrome BD-II oxidase subunit I from Escherichia coli strain K12 (514 aa), FASTA scores: opt: 870, E(): 0, (35.9% identity in 485 aa overlap); AL034355|SCD78_12 from Streptomyces coelicolor (501 aa), FASTA scores: opt: 1099,E(): 0, (48.6% identity in 510 aa [...]

Probable NADH dehydrogenase I (chain A) NuoA (NADH-ubiquinone oxidoreductase chain A); NDH-1 shuttles electrons from NADH, via FMN and iron-sulfur (Fe-S) centers, to quinones in the respiratory chain. The immediate electron acceptor for the enzyme in this species is believed to be a menaquinone. Couples the redox reaction to proton translocation (for every two electrons transferred, four hydrogen ions are translocated across the cytoplasmic membrane), and thus conserves the redox energy in a proton gradient; Belongs to the complex I subunit 3 family.