Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AYfaS_6the4rtdA8 A: beta sandwichesX: jelly-rollH: Spermadhesin, CUB domain (From Topology)T: Spermadhesin, CUB domainF: YfaS_6thECOD (1.6)
AA2M_N_1e4rtdA7 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_N_1ECOD (1.6)
AYfaS_5the4rtdA6 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: YfaS_5thECOD (1.6)
AYfaS_3rde4rtdA5 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: YfaS_3rdECOD (1.6)
AYfaS_4the4rtdA4 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: YfaS_4thECOD (1.6)
AUNK_F_TYPEe4rtdA3 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: UNK_F_TYPEECOD (1.6)
AYfaS_7the4rtdA2 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Common fold of diphtheria toxin/transcription factors/cytochrome fF: YfaS_7thECOD (1.6)
AThiol-ester_cl_1e4rtdA1 A: alpha superhelicesX: Repetitive alpha hairpinsH: alpha/alpha toroid (From Topology)T: alpha/alpha toroidF: Thiol-ester_cl_1ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF01835MG2 domain (MG2)MG2 domainThis is the MG2 (macroglobulin) domain of alpha-2-macroglobulin in eukaryotes [1]. Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. How ...This is the MG2 (macroglobulin) domain of alpha-2-macroglobulin in eukaryotes [1]. Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and species that colonize higher eukaryotes. This domain is found in eukaryotic and bacterial proteins. In human A2Ms, this domain is termed macroglobulin-like (MG) domain 2 and in Salmonella enterica ser A2Ms, this is domain 4 [2] [3].
Domain
PF00207Alpha-2-macroglobulin family (A2M)Alpha-2-macroglobulin family- Family
PF07678A-macroglobulin TED domain (TED_complement)A-macroglobulin TED domain- Repeat
PF17972Bacterial Alpha-2-macroglobulin MG5 domain (bMG5)Bacterial Alpha-2-macroglobulin MG5 domainAlpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and spe ...Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and species that colonize higher eukaryotes. Bacterial A2Ms are located in the periplasm where they are believed to provide protection to the cell by trapping external proteases through a covalent interaction with an activated thioester. This domain is found on the N-terminal region in A2Ms in bacteria. Structure analysis of Salmonella enterica ser A2Ms (SA-A2Ms) show that they are composed of 13 domains, all of which fold as variants of beta sandwiches with the exception of the TED, which consists of 14 alpha helices. Most of the beta sandwich domains appear to serve a structural role and are referred to as the macroglobulin-like (MG) domains. This is the MG5 domain [1].
Domain
PF17973Bacterial Alpha-2-macroglobulin MG10 domain (bMG10)Bacterial Alpha-2-macroglobulin MG10 domainAlpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and spe ...Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and species that colonize higher eukaryotes. Bacterial A2Ms are located in the periplasm where they are believed to provide protection to the cell by trapping external proteases through a covalent interaction with an activated thioester. This domain is found on the C-terminal region in A2Ms in bacteria. Structure analysis of Salmonella enterica ser A2Ms (SA-A2Ms) show that they are composed of 13 domains, all of which fold as variants of beta sandwiches with the exception of the TED, which consists of 14 alpha helices. Most of the beta sandwich domains appear to serve a structural role and are referred to as the macroglobulin-like (MG) domains. This is the MG10 domain. MG10 is markedly different from the other MG domains in that it has more beta strands and an alpha helix. The position of MG10 is stabilized by, in addition to other hydrogen bonds, the formation of a beta sheet with MG9 [1].
Domain
PF17962Bacterial macroglobulin domain 6 (bMG6)Bacterial macroglobulin domain 6This macroglobulin domain is found in bacterial alpha 2 macroglobulin proteins. It adopts an Ig-like beta sandwich fold [1].Domain
PF21765A2MG, CUB domain (A2MG_CUB)A2MG, CUB domainThis domain is found in a group of proteins predominantly found in proteobacteria, including Alpha-2-macroglobulin (A2MG) from Salmonella typhimurium, a protein that protects the bacterial cell from host peptidases. A2MG is composed of 13 domains, 12 ...This domain is found in a group of proteins predominantly found in proteobacteria, including Alpha-2-macroglobulin (A2MG) from Salmonella typhimurium, a protein that protects the bacterial cell from host peptidases. A2MG is composed of 13 domains, 12 of them folding as beta sandwiches. This entry represents the CUB (complement C1r/C1s, Uegf, Bmp1) domain, which is connected to the TED domain (Pfam:PF07678).
Domain