Acyl carrier protein (ACP) MbtL; Acyl carrier protein involved in the formation of acyl-S-ACP intermediates within the mycobactin biosynthesis process. The aliphatic chains carried by ACP are subsequently transferred on to the mycobactin core by MbtK.

Rv2380c, (MTCY22H8.05), len: 1682 aa. MbtE, peptide synthetase (see citations below), similar in part to several synthases e.g. O07944|SNBDE pristinamycin I synthase 3 and 4 from Streptomyces pristinaespiralis (4848 aa), FASTA scores: opt: 2635, E(): 1.9e-146, (36.8% identity in 1657 aa overlap); O05647|SNBDE virginiamycin S synthetase (fragment) from Streptomyces virginiae (1997 aa) FASTA scores: opt: 2580, E(): 1.6e-143, (40.65% identity in 1163 aa overlap); Q9R9I2|DHBF protein involved in siderophore production from Bacillus subtilis (2378 aa),FASTA scores: opt: 2388, E(): 3.6e-132, [...]

Phenyloxazoline synthase MbtB (phenyloxazoline synthetase); Involved in the initial steps of the mycobactin biosynthetic pathway. Putatively couples activated salicylic acid with serine or threonine and cyclizes this precursor to the hydroxyphenyloxazoline ring system present in this class of siderophores. Essential for growth in macrophages; Belongs to the ATP-dependent AMP-binding enzyme family. MbtB subfamily.

Rv2379c, (MTCY27.01), len: 1461 aa. MbtF, peptide synthetase (see citations below), similar in part to several synthases e.g. O52820|PCZA363.4 protein from Amycolatopsis orientalis (4077 aa), FASTA scores: opt: 1873, E(): 1.1e-99, (35.55% identity in 1522 aa overlap); O07944|SNBDE pristinamycin I synthase 3 and 4 from Streptomyces pristinaespiralis (4848 aa), FASTA scores: opt: 1817, E(): 2.1e-96, (33.65% identity in 1463 aa overlap); O52821 protein similar to peptide synthetase from Amycolatopsis orientalis (1860 aa) FASTA scores: opt: 1705,E(): 2.9e-90, (34.75% identity in 1344 aa ov [...]

Hypothetical protein; Rv2336, (MTCY98.05), len: 322 aa. Hypothetical unknown protein (see Rindi et al., 2001). This region is a possible MT-complex-specific genomic island (See Becq et al., 2007).

Rv2940c, (MTCY24G1.09, MTCY19H9.08c), len: 2111 aa. Probable mas, mycocerosic acid synthase membrane associated, multifunctional enzyme (see citations below),almost identical to Q02251|MCAS_MYCBO|mas mycocerosic acid synthase from Mycobacterium bovis (2110 aa), FASTA scores: opt: 13226, E(): 0, (95.8% identity in 2115 aa overlap) (see Mathur & Kolattukudy 1992); and equivalent to Q9CD78|mas|ML0139 putative mycocerosic synthase from Mycobacterium leprae (2116 aa), FASTA scores: opt: 12142,E(): 0, (87.95% identity in 2119 aa overlap); and Q49624|PKS3|MASA|ML1229|B1170_C2_209 probable myc [...]

Polyketide synthase Pks12; Rv2048c, (MTV018.35c), len: 4151 aa. Pks12,polyketide synthase similar to many. Contains 2x PS00012 Phosphopantetheine attachment site, 2x PS00606 Beta-ketoacyl synthases active site, and PS00343 Gram-positive cocci surface proteins 'anchoring' hexapeptide. Nucleotide position 2297976 in the genome sequence has been corrected, G:A resulting in S3004L.

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.

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.