7O4W

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF01324	e7o4wA3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Common fold of diphtheria toxin/transcription factors/cytochrome f	F: PF01324	ECOD (1.6)
A	PF02764	e7o4wA1	A: alpha arrays	X: Toxins' membrane translocation domains	H: Diphtheria toxin, middle domain (From Topology)	T: Diphtheria toxin, middle domain	F: PF02764	ECOD (1.6)
A	PF02763	e7o4wA2	A: a+b complex topology	X: ADP-ribosylation (From Topology)	H: ADP-ribosylation (From Topology)	T: ADP-ribosylation	F: PF02763	ECOD (1.6)

Chains	Accession	Name	Description	Comments	Source
A	PF02764	Diphtheria toxin, T domain (Diphtheria_T)	Diphtheria toxin, T domain	Central domain of diphtheria toxin is the translocation (T) domain. pH induced conformational change in this domain triggers insertion into the endosomal membrane and facilitates the transfer of the catalytic domain into the cytoplasm.	Domain
A	PF01324	Diphtheria toxin, R domain (Diphtheria_R)	Diphtheria toxin, R domain	C-terminal receptor binding (R) domain - binds to cell surface receptor, permitting the toxin to enter the cell by receptor mediated endocytosis.	Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Diphtheria toxin	identical protein binding protein binding binding pentosyltransferase activity glycosyltransferase activity NAD+-diphthamide ADP-ribosyltransferase activity transferase activity catalytic activity toxin activity	-	extracellular region extracellular space cellular anatomical entity

Chains	Accession	Name	Type
A	IPR036799	Diphtheria toxin, receptor-binding domain superfamily	Homologous Superfamily
A	IPR000512	Diphtheria toxin (NAD+-dipthamide ADP-ribosyltransferase)	Family
A	IPR022404	Diphtheria toxin, receptor-binding domain	Domain
A	IPR036801	Diphtheria toxin, translocation domain superfamily	Homologous Superfamily
A	IPR022406	Diphtheria toxin, catalytic domain	Domain