6 kDa early secretory antigenic target EsxA (ESAT-6); A secreted protein that plays a number of roles in modulating the host's immune response to infection as well as being responsible for bacterial escape into the host cytoplasm. Acts as a strong host (human) T-cell antigen. Inhibits IL- 12 p40 (IL12B) and TNF-alpha expression by infected host (mouse) macrophages, reduces the nitric oxide response by about 75%. In mice previously exposed to the bacterium, elicits high level of IFN-gamma production by T-cells upon subsequent challenge by M.tuberculosis, in the first phase of a protecti [...]

Alanine and proline-rich secreted protein Apa; A potent antigen in animals immunized with live bacteria, it induces a strong delayed-type hypersensitivity (DTH) in immunized animals. Elicits a mostly Th1 type of T-cell response in healthy humans; induces IFN-gamma production from CD4(+) and CD8(+) cells. Functions as an adhesin, binds to mouse macrophages via mannose residues. Might interact via host CD209. Belongs to the Apa family.

Diacylglycerol acyltransferase/mycolyltransferase Ag85B; The antigen 85 proteins (FbpA, FbpB, FbpC) are responsible for the high affinity of mycobacteria for fibronectin, a large adhesive glycoprotein, which facilitates the attachment of M.tuberculosis to murine alveolar macrophages (AMs). They also help to maintain the integrity of the cell wall by catalyzing the transfer of mycolic acids to cell wall arabinogalactan and through the synthesis of alpha,alpha- trehalose dimycolate (TDM, cord factor). They catalyze the transfer of a mycoloyl residue from one molecule of alpha,alpha-treha [...]

10 kDa culture filtrate antigen EsxB (LHP) (CFP10); A secreted protein. Acts as a strong host (human) T-cell antigen. Involved in translocation of bacteria from the host (human) phagolysosome to the host cytoplasm. Might serve as a chaperone to prevent uncontrolled membrane lysis by its partner EsxA; native protein binds poorly to artificial liposomes in the absence or presence of EsxA. EsxA and EsxA-EsxB are cytotoxic to pneumocytes. EsxB (and EsxA-EsxB but not EsxA alone) activates human neutrophils; EsxB transiently induces host (human) intracellular Ca(2+) mobility in a dose-depend [...]

Diacylglycerol acyltransferase/mycolyltransferase Ag85A; The antigen 85 proteins (FbpA, FbpB, FbpC) are responsible for the high affinity of mycobacteria for fibronectin, a large adhesive glycoprotein, which facilitates the attachment of M.tuberculosis to murine alveolar macrophages (AMs). They also help to maintain the integrity of the cell wall by catalyzing the transfer of mycolic acids to cell wall arabinogalactan, and through the synthesis of alpha,alpha- trehalose dimycolate (TDM, cord factor). They catalyze the transfer of a mycoloyl residue from one molecule of alpha,alpha-treh [...]

Soluble secreted antigen Mpt53 precursor; Disulfide oxidoreductase that catalyzes the oxidation of reduced, unfolded secreted proteins to form disulfide bonds. Despite a weak homology to thioredoxin this cannot serve as a substrate for thioredoxin reductase.

10 kDa chaperonin GroES (protein CPN10) (protein GroES) (BCG-a heat shock protein) (10 kDa antigen); Binds to Cpn60 in the presence of Mg-ATP and suppresses the ATPase activity of the latter; Belongs to the GroES chaperonin family.

MPT51/MPB51 antigen; May have a role in host tissue attachment, whereby ligands may include the serum protein fibronectin and small sugars.

Major secreted immunogenic protein Mpt70; Rv2875, (MTCY274.06), len: 193 aa. Mpt70 (alternate gene name: mpb70), major secreted immunogenic protein MPT70 precursor (see citations below). Also similar to downstream ORF Q10790|MP83_MYCTU|MPT83|MPB83|Rv2873|MT2940|MTCY274.04 cell surface lipoprotein MPT83 precursor (lipoprotein P23) (220 aa), FASTA scores: opt: 806, E(): 1.2e-40, (70.25% identity in 185 aa overlap). Belongs to the MPT70 / MPT83 family. Generally found as a monomer; homodimer in culture fluids.