ESX-3 secretion-associated protein EspG3; Specific chaperone for cognate PE/PPE proteins. Plays an important role in preventing aggregation of PE/PPE dimers.

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 [...]

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 [...]

PPE family protein PPE4; Important for the siderophore-mediated iron-acquisition function of ESX-3; Belongs to the mycobacterial PPE family.

Rv3020c, (MTV012.34c), len: 97 aa. EsxS, ESAT-6 like protein. PE-family related protein; distant member of the Mycobacterium tuberculosis PE family, similar to AAK44524|MT0300 PE family protein from M. tuberculosis strain CDC1551 (97 aa), FASTA scores: opt: 564, E(): 5.9e-30, (91.75% identity in 97 aa overlap). Has potential helix-turn-helix motif at positions 14-35. Seems to belong to the ESAT6 family (see Betts et al., 2002). Note that previously known as PE28. A core mycobacterial gene; conserved in mycobacterial strains (See Marmiesse et al.,2004).

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 [...]

ESX-3 secretion system protein EccD3; Part of the ESX-3 specialized secretion system, which is important for iron and zinc uptake or homeostasis.

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 [...]

PE family protein PE5; Important for the siderophore-mediated iron-acquisition function of ESX-3. May play a pivotal role in the evasion of host immune response by M.tuberculosis. Mediates production of IL-10 via activation of the p38 and ERK1/2 mitogen-activated protein kinase (MAPK) signaling pathways.