Mycoplasma immunoglobulin binding protein M2 domain
This entry represents the M2 domain of Mycoplasma immunoglobulin binding (MIB) protein. The MIB_M2 domain (residues 510 to 740) shares structural features with the M2 domain of Protein M from Mycoplasma genitalium, although with less conservation. Th ...
This entry represents the M2 domain of Mycoplasma immunoglobulin binding (MIB) protein. The MIB_M2 domain (residues 510 to 740) shares structural features with the M2 domain of Protein M from Mycoplasma genitalium, although with less conservation. This domain primarily binds to the VL domain of antibody Fab fragments and also encircles the light chain between the CL and VL domains. MIB proteins are surface proteins found in the majority of mycoplasma species that, together with MIP (Mycoplasma immunoglobulin protease), capture antibodies and disrupt their antigen binding site. The M2 domain contains a distinctive long loop (residues 533 to 546) that is absent in Protein M.
Mycoplasma immunoglobulin binding protein arm domain
This entry represents the N-terminal arm domain of the Mycoplasma immunoglobulin binding (MIB) protein. This domain contributes to the hug of death mechanism by which MIB and MIP proteins capture and cleave antibodies. The MIB arm domain is made of a ...
This entry represents the N-terminal arm domain of the Mycoplasma immunoglobulin binding (MIB) protein. This domain contributes to the hug of death mechanism by which MIB and MIP proteins capture and cleave antibodies. The MIB arm domain is made of a globular region and connects to the MIB M1 and M2 domains via a large N-terminal hairpin. While the full MIB protein binds to antibody light chains and displaces antibodies from their antigens, the specific role of the arm domain is to encircle the antibody and provide the conformational flexibility necessary to reach antibodies bound to surface antigens.
Mycoplasma immunoglobulin binding protein M1 domain
This entry represents the M1 domain of Mycoplasma immunoglobulin binding (MIB) protein. The MIB_M1 domain (residues 360 to 509) shares structural features with the M1 domain of Protein M from Mycoplasma genitalium. This domain, along with the MIB_M2 ...
This entry represents the M1 domain of Mycoplasma immunoglobulin binding (MIB) protein. The MIB_M1 domain (residues 360 to 509) shares structural features with the M1 domain of Protein M from Mycoplasma genitalium. This domain, along with the MIB_M2 domain, plays a critical role in binding to the light chain of antibodies. MIB proteins are surface proteins found in the majority of mycoplasma species and act together with MIP (Mycoplasma immunoglobulin protease) to capture antibodies and cleave off their VH domains. MIB M1 domain makes extensive interactions with the MIP protease core domain and contributes to the disruption of the antigen binding site of antibodies.
