Annotations: 6FBM

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D	UNK_F_TYPE	e6fbmD2	A: beta duplicates or obligate multimers	X: Pleurotolysin B C-terminal domain (From Topology)	H: Pleurotolysin B C-terminal domain (From Topology)	T: Pleurotolysin B C-terminal domain	F: UNK_F_TYPE	ECOD (1.6)
D	MACPF	e6fbmD1	A: beta complex topology	X: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains (From Topology)	H: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains (From Topology)	T: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains	F: MACPF	ECOD (1.6)
C	UNK_F_TYPE	e6fbmC2	A: beta duplicates or obligate multimers	X: Pleurotolysin B C-terminal domain (From Topology)	H: Pleurotolysin B C-terminal domain (From Topology)	T: Pleurotolysin B C-terminal domain	F: UNK_F_TYPE	ECOD (1.6)
C	MACPF	e6fbmC1	A: beta complex topology	X: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains (From Topology)	H: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains (From Topology)	T: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains	F: MACPF	ECOD (1.6)
B	UNK_F_TYPE	e6fbmB2	A: beta duplicates or obligate multimers	X: Pleurotolysin B C-terminal domain (From Topology)	H: Pleurotolysin B C-terminal domain (From Topology)	T: Pleurotolysin B C-terminal domain	F: UNK_F_TYPE	ECOD (1.6)
B	MACPF	e6fbmB1	A: beta complex topology	X: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains (From Topology)	H: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains (From Topology)	T: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains	F: MACPF	ECOD (1.6)
A	UNK_F_TYPE	e6fbmA2	A: beta duplicates or obligate multimers	X: Pleurotolysin B C-terminal domain (From Topology)	H: Pleurotolysin B C-terminal domain (From Topology)	T: Pleurotolysin B C-terminal domain	F: UNK_F_TYPE	ECOD (1.6)
A	MACPF	e6fbmA1	A: beta complex topology	X: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains (From Topology)	H: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains (From Topology)	T: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains	F: MACPF	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF01823	MAC/Perforin domain (MACPF)	MAC/Perforin domain	The membrane-attack complex (MAC) of the complement system forms transmembrane channels. These channels disrupt the phospholipid bilayer of target cells, leading to cell lysis and death. A number of proteins participate in the assembly of the MAC. Fr ...	The membrane-attack complex (MAC) of the complement system forms transmembrane channels. These channels disrupt the phospholipid bilayer of target cells, leading to cell lysis and death. A number of proteins participate in the assembly of the MAC. Freshly activated C5b binds to C6 to form a C5b-6 complex, then to C7 forming the C5b-7 complex. The C5b-7 complex binds to C8, which is composed of three chains (alpha, beta, and gamma), thus forming the C5b-8 complex. C5b-8 subsequently binds to C9 and acts as a catalyst in the polymerisation of C9. Active MAC has a subunit composition of C5b-C6-C7-C8-C9{n}. Perforin is a protein found in cytolytic T-cell and killer cells. In the presence of calcium, perforin polymerises into transmembrane tubules and is capable of lysing, non-specifically, a variety of target cells. There are a number of regions of similarity in the sequences of complement components C6, C7, C8-alpha, C8-beta, C9 and perforin. The X-ray crystal structure of a MACPF domain reveals that it shares a common fold with bacterial cholesterol dependent cytolysins (Pfam:PF01289) such as perfringolysin O. Three key pieces of evidence suggests that MACPF domains and CDCs are homologous: Functional similarity (pore formation), conservation of three glycine residues at a hinge in both families and conservation of a complex core fold [1].	Domain
A, B, C, D	PF06101	Vacuolar protein sorting-associated protein 62 (Vps62)	Vacuolar protein sorting-associated protein 62	-	Family

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR020864	Membrane attack complex component/perforin (MACPF) domain	Domain
A, B, C, D	IPR009291	Vacuolar protein sorting-associated protein 62	Family

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.