A possible member of the dormancy regulon. Induced in response to reduced oxygen tension (hypoxia). It is hoped that this regulon will give insight into the latent, or dormant phase of infection. Was identified as a high-confidence drug target. Belongs to the AB hydrolase superfamily. Lipase family. Although related to the lipase family, lacks the conserved His active site at position 344 which is replaced by a Gln residue, suggesting it is inactive.