2CN4

The crystal structure of the secreted dimeric form of the hemophore HasA reveals a domain swapping with an exchanged heme ligand

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
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)
A	d2cn4a_	Alpha and beta proteins (a+b)	Heme-binding protein A (HasA)	Heme-binding protein A (HasA)	Heme-binding protein A (HasA)	automated matches	(Serratia marcescens ) [TaxId: 615 ],	SCOPe (2.08)
B	d2cn4b_	Alpha and beta proteins (a+b)	Heme-binding protein A (HasA)	Heme-binding protein A (HasA)	Heme-binding protein A (HasA)	automated matches	(Serratia marcescens ) [TaxId: 615 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Heme-binding protein A (HasA)	8034957	3000777	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Heme-binding protein A (HasA)	8034957	3000777	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	HasA	e2cn4A1	A: a+b two layers	X: Heme-binding protein A (HasA) (From Topology)	H: Heme-binding protein A (HasA) (From Topology)	T: Heme-binding protein A (HasA)	F: HasA	ECOD (1.6)
B	HasA	e2cn4B1	A: a+b two layers	X: Heme-binding protein A (HasA) (From Topology)	H: Heme-binding protein A (HasA) (From Topology)	T: Heme-binding protein A (HasA)	F: HasA	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.1500.10	Alpha Beta	2-Layer Sandwich	Heme-binding Protein A	Chain: A	CATH (4.3.0)
B	3.30.1500.10	Alpha Beta	2-Layer Sandwich	Heme-binding Protein A	Chain: A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF06438	Heme-binding protein A (HasA) (HasA)	Heme-binding protein A (HasA)	Free iron is limited in vertebrate hosts, thus an alternative to siderophores has been developed by pathogenic bacteria to access host iron bound in protein complexes. HasA is a secreted hemophore that has the ability to obtain iron from hemoglobin. ...	Free iron is limited in vertebrate hosts, thus an alternative to siderophores has been developed by pathogenic bacteria to access host iron bound in protein complexes. HasA is a secreted hemophore that has the ability to obtain iron from hemoglobin. Once bound to HasA, the heme is shuttled to the receptor HasR, which releases the heme into the bacterium [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	HEMOPHORE HASA	cation binding ion binding binding metal ion binding small molecule binding	-	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR010495	Haem-binding HasA	Family
A, B	IPR036912	Haem-binding HasA superfamily	Homologous Superfamily

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.