Annotations: 1X3X

Crystal Structure of Cytochrome b5 from Ascaris suum

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1x3xb_	Alpha and beta proteins (a+b)	Cytochrome b5-like heme/steroid binding domain	Cytochrome b5-like heme/steroid binding domain	automated matches	automated matches	pig roundworm (Ascaris suum ) [TaxId: 6253 ],	SCOPe (2.08)
A	d1x3xa_	Alpha and beta proteins (a+b)	Cytochrome b5-like heme/steroid binding domain	Cytochrome b5-like heme/steroid binding domain	automated matches	automated matches	pig roundworm (Ascaris suum ) [TaxId: 6253 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Cytochrome b5-like heme/steroid binding domain	8068629	3000073	SCOP2B (2022-06-29)
A	SCOP2 Family	Cytochrome b5	8068628	4000144	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Cytochrome b5-like heme/steroid binding domain	8068629	3000073	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	PCNA_N	e1x3xB1	A: beta barrels	X: HTH	H: Nudix	T: winged helix domain	F: PCNA_N	ECOD (v294.2)
A	Cro	e1x3xA1	A: beta barrels	X: Globin-like	H: Globin-like	T: Globin-like	F: Cro	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.10.120.10	Alpha Beta	Roll	Flavocytochrome B2	Chain A, domain 1	CATH (4.3.0)
A	3.10.120.10	Alpha Beta	Roll	Flavocytochrome B2	Chain A, domain 1	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Cytochrome b5	binding tetrapyrrole binding heme binding cation binding ion binding metal ion binding small molecule binding	-	cellular anatomical structure membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR036400	Cytochrome b5-like heme/steroid binding domain superfamily	Homologous Superfamily
A, B	IPR001199	Cytochrome b5-like heme/steroid binding domain	Domain
A, B	IPR050668	Cytochrome b5	Family

RCSB PDB is hosted by

RCSB PDB is a member of

RCSB Partners
Nucleic Acid Knowledgebase

CoreTrustSeal

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.