ATP + H2O = ADP + H(+) + phosphate A member of the dormancy regulon. Induced in response to reduced oxygen tension (hypoxia), low levels of nitric oxide (NO) and carbon monoxide (CO). It is hoped that this regulon will give insight into the latent, or dormant phase of infection. This protein serves as an immunogenic antigen, inducing gamma-interferon responses in whole-blood cultures from M.tuberculosis-exposed adults in Uganda and South Africa, indicating this might be a good vaccine candidate. Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type IIA subfamily.