3KLS | pdb_00003kls

Structure of complement C5 in complex with SSL7

External Resource: Annotation


Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
C [auth B]SCOP2B SuperfamilyAnaphylotoxins (complement system) 8037606 3000387 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyTIMP-like 8044187 3000488 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyAnaphylotoxins (complement system) 8037606 3000387 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
D [auth Y]Glyco_hydro_30e3klsY1 A: a/b three-layered sandwichesX: cradle loop barrelH: RIFT-relatedT: acid proteaseF: Glyco_hydro_30ECOD (v294.1)
B [auth X]Flavodoxin_1e3klsX1 A: a/b three-layered sandwichesX: Cystatin-likeH: NTF2-likeT: NTF2-likeF: Flavodoxin_1ECOD (v294.1)
C [auth B]MG1e3klsB5 A: a/b three-layered sandwichesX: Alpha-beta plaitsH: Pseudouridine synthaseT: Pseudouridine synthaseF: MG1ECOD (v294.1)
AMG1e3klsA1 A: a/b three-layered sandwichesX: Alpha-beta plaitsH: Pseudouridine synthaseT: Pseudouridine synthaseF: MG1ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
D [auth Y]3.10.20.120 Alpha Beta Roll Ubiquitin-like (UB roll) CATH (4.3.0)
D [auth Y]2.40.50.110 Mainly Beta Beta Barrel OB fold (Dihydrolipoamide Acetyltransferase, E2P) CATH (4.3.0)
B [auth X]3.10.20.120 Alpha Beta Roll Ubiquitin-like (UB roll) CATH (4.3.0)
B [auth X]2.40.50.110 Mainly Beta Beta Barrel OB fold (Dihydrolipoamide Acetyltransferase, E2P) CATH (4.3.0)
C [auth B]2.60.40.1930 Mainly Beta Sandwich Immunoglobulin-like Macroglobulin (MG2) domainCATH (4.3.0)
C [auth B]2.60.40.1940 Mainly Beta Sandwich Immunoglobulin-like CATH (4.3.0)
C [auth B]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
C [auth B]2.20.130.20 Mainly Beta Single Sheet S-adenosyl-L-methionine-dependent methyltransferases CATH (4.3.0)
C [auth B]1.20.91.20 Mainly Alpha Up-down Bundle Influenza Virus Matrix Protein Chain A, domain 1CATH (4.3.0)
C [auth B]2.60.120.1540 Mainly Beta Sandwich Jelly Rolls CATH (4.3.0)
C [auth B]1.50.10.20 Mainly Alpha Alpha/alpha barrel Glycosyltransferase CATH (4.3.0)
C [auth B]2.60.40.690 Mainly Beta Sandwich Immunoglobulin-like Alpha-macroglobulin, receptor-binding domainCATH (4.3.0)
A2.60.40.1930 Mainly Beta Sandwich Immunoglobulin-like Macroglobulin (MG2) domainCATH (4.3.0)
A2.60.40.1940 Mainly Beta Sandwich Immunoglobulin-like CATH (4.3.0)
A2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
A2.20.130.20 Mainly Beta Single Sheet S-adenosyl-L-methionine-dependent methyltransferases CATH (4.3.0)
A6.10.270.10 Special Helix non-globular Pheromone ER-1 CATH (4.3.0)
A1.20.91.20 Mainly Alpha Up-down Bundle Influenza Virus Matrix Protein Chain A, domain 1CATH (4.3.0)
A2.60.120.1540 Mainly Beta Sandwich Jelly Rolls CATH (4.3.0)
A1.50.10.20 Mainly Alpha Alpha/alpha barrel Glycosyltransferase CATH (4.3.0)
A2.60.40.690 Mainly Beta Sandwich Immunoglobulin-like Alpha-macroglobulin, receptor-binding domainCATH (4.3.0)
A2.40.50.120 Mainly Beta Beta Barrel OB fold (Dihydrolipoamide Acetyltransferase, E2P) CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A,
C [auth B]		PF01821Anaphylotoxin-like domain (ANATO)Anaphylotoxin-like domainC3a, C4a and C5a anaphylatoxins are protein fragments generated enzymatically in serum during activation of complement molecules C3, C4, and C5. They induce smooth muscle contraction. These fragments are homologous to a three-fold repeat in fibulins. ...C3a, C4a and C5a anaphylatoxins are protein fragments generated enzymatically in serum during activation of complement molecules C3, C4, and C5. They induce smooth muscle contraction. These fragments are homologous to a three-fold repeat in fibulins.
Domain
A,
C [auth B]		PF17791Macroglobulin domain MG3 (MG3)Macroglobulin domain MG3This entry corresponds to the MG3 domain found in complement components C3, C4 and C5. Domain
A,
C [auth B]		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
A,
C [auth B]		PF00207Alpha-2-macroglobulin family (A2M)Alpha-2-macroglobulin family- Family
A,
C [auth B]		PF01759UNC-6/NTR/C345C module (NTR)UNC-6/NTR/C345C moduleSequence similarity between netrin UNC-6 and C345C complement protein family members, and hence the existence of the UNC-6 module, was first reported in [1]. Subsequently, many additional members of the family were identified on the basis of sequence ...Sequence similarity between netrin UNC-6 and C345C complement protein family members, and hence the existence of the UNC-6 module, was first reported in [1]. Subsequently, many additional members of the family were identified on the basis of sequence similarity between the C-terminal domains of netrins, complement proteins C3, C4, C5, secreted frizzled-related proteins, and type I pro-collagen C-proteinase enhancer proteins (PCOLCEs), which are homologous with the N-terminal domains of tissue inhibitors of metalloproteinases (TIMPs). The TIMPs are classified as a separate family in Pfam (Pfam:PF00965) [2]. This expanded domain family has been named as the NTR module [2].
Domain
A,
C [auth B]		PF07678A-macroglobulin TED domain (TED_complement)A-macroglobulin TED domain- Repeat
A,
C [auth B]		PF07677A-macroglobulin receptor binding domain (A2M_recep)A-macroglobulin receptor binding domainThis family includes the receptor binding domain region of the alpha-2-macroglobulin family. Domain
A,
C [auth B]		PF21309Complement component 5, CUB domain (C5_CUB)Complement component 5, CUB domainComplement component 5 (C5) is a component of the lytic complex consisting of factors C5-C9 which attack bacterial cell membranes. This entry represents the CUB domain [1-5]. Domain
A,
C [auth B]		PF07703Alpha-2-macroglobulin bait region domain (A2M_BRD)Alpha-2-macroglobulin bait region 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. This domain is found in eukaryotic and bacterial proteins. In human A2Ms, this domain encompasses macroglobulin-like domain MG5 and 6 including bait region. In Salmonella enterica ser A2Ms, this domain encompasses MG7 and MG8 including the bait region [1] [2]. The Bait region is cleaved by proteases, followed by a large conformational change that blocks the target protease within a cage-like complex. This model of protease entrapment is recognised as the Venus flytrap mechanism [1].
Domain
A,
C [auth B]		PF17789Macroglobulin domain MG4 (MG4)Macroglobulin domain MG4This domain is MG4 found in complement C3 and C5 proteins. Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
B [auth X],
D [auth Y]		Exotoxin 1---
A,
C [auth B]		Complement C5

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A,
C [auth B]		IPR009048Alpha-macroglobulin, receptor-bindingDomain
A,
C [auth B]		IPR041555Macroglobulin domain MG3Domain
A,
C [auth B]		IPR001599Alpha-2-macroglobulinDomain
A,
C [auth B]		IPR048843Complement component 5, CUB domainDomain
A,
C [auth B]		IPR018081Anaphylatoxin, complement systemHomologous Superfamily
A,
C [auth B]		IPR018933Netrin module, non-TIMP typeDomain
A,
C [auth B]		IPR001840Anaphylatoxin, complement system domainDomain
A,
C [auth B]		IPR041425Complement C3/4/5, macroglobulin domain MG1Domain
A,
C [auth B]		IPR011625Alpha-2-macroglobulin, bait region domainDomain
A,
C [auth B]		IPR001134Netrin domainDomain
A,
C [auth B]		IPR008993Tissue inhibitor of metalloproteinases-like, OB-foldHomologous Superfamily
A,
C [auth B]		IPR011626Alpha-macroglobulin-like, TED domainDomain
A,
C [auth B]		IPR000020Anaphylatoxin/fibulinDomain
A,
C [auth B]		IPR036595Alpha-macroglobulin, receptor-binding domain superfamilyHomologous Superfamily
A,
C [auth B]		IPR002890Macroglobulin domainDomain
A,
C [auth B]		IPR013783Immunoglobulin-like foldHomologous Superfamily
A,
C [auth B]		IPR050473Alpha-2-macroglobulin/Complement systemFamily
A,
C [auth B]		IPR008930Terpenoid cyclases/protein prenyltransferase alpha-alpha toroidHomologous Superfamily
A,
C [auth B]		IPR040839Macroglobulin domain MG4Domain

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
A,
C [auth B]		Pharos:  P01031