Review Article
Lipid Droplets and Mycobacterium leprae Infection
Table 1
Comparison between the enzymes involved in TAG metabolism in M. tuberculosis and M. bovis BCG and their homologous in M. leprae. ND, not determined.
| Gene | Enzyme | Diacylglycerol acyltransferase activity (in vitro) | Influence on lipid bodies/TAG accumulation | M. leprae homologue | M. leprae homologue-diacylglycerol acyltransferase activity (in vitro) | Reference |
| Rv3130c (tgs1) | DGAT | + | Δtgs1decreases TAG accumulation | ML1244 | ND | [26, 78] | Rv3734c (tgs2) | DGAT | + | ND | ML1244 | ND | [26, 78] | Rv3234c (tgs3) | DGAT | + | ND | ML1244 | ND | [26, 78] | Rv3088 (tgs4) | DGAT | + | ND | ML1244 | ND | [26, 78] | Rv1760 | DGAT | + | ND | ML1244 | ND | [26, 78] | Rv2285 | DGAT | + | ND | ML1244 | ND | [26, 78] | Rv3804c (85A) | DGAT | + | Overexpression increases production of lipid bodies | ML0097 (85A) | ND | [79] | BCG1489c [Rv1428c] | DGAT | ND | ΔBCG1489c reduces TAG accumulation | ML2427c | ND | [80] | BCG3153c (tgs1) [Rv3130c] | DGAT | ND | ΔBCG3153c reduces TAG accumulation | ML1244 | ND | [77] | BCG3794c (tgs2) [Rv3734c] | DGAT | ND | ΔBCG3794c reduces TAG accumulation | ML1244 | ND | [80] |
| Gene | Enzyme | TAG-hydrolyzing activity (in vitro) | Influence on lipid bodies/TAG accumulation | M. leprae homologue | M. leprae homologue-TAG-hydrolyzing activity (in vitro) | Reference |
| Rv3097c (lipY) | Lipase/esterase | + | ΔlipY reduces TAG hydrolysis. Overexpression increases TAG hydrolysis
| ML0314c (lipU) ML1053 ML1183c
| ND | [76] | Rv1399c (lipH ) | Lipase/esterase | + | ND | ML0314c (lipU) | ND | [75] | BCG1721 [Rv1683] | Lipase/esterase | + | + | ML1346 | ND | [80] | Rv0183 | Lipase/esterase | Hydrolyzes only monoacylglycerides
| ND | ML2603 | ND | [81] | Rv2224c | Lipase/esterase | ND | ND | ML1633c | ND | [82] |
| Gene | Enzyme | Isocitrate cleavage (in vitro) | Influence on lipid bodies/TAG accumulation | M. leprae homologue | M. leprae homologue-isocitrate cleavage (in vitro) | Reference |
| Rv0467 (icl) Rv1916 (icl2) | isocitrate lyase | + | ND (but the Δicl, Δicl2 strain shows no intracellular replication) | ML1985c (aceA) | ND | [83–87] |
|
|