Annotations: 4U99

Crystal structure of an H-NOX protein from S. oneidensis in the Fe(II) ligation state, Q154A/Q155A/K156A mutant

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Filamin	e4u99A1	A: a/b three-layered sandwiches	X: Thioredoxin-like	H: ClpP/crotonase	T: ClpP/crotonase	F: Filamin	ECOD (v294.1)
B	Filamin	e4u99B1	A: a/b three-layered sandwiches	X: Thioredoxin-like	H: ClpP/crotonase	T: ClpP/crotonase	F: Filamin	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.1520.10	Alpha Beta	Alpha-Beta Complex	H-NOX domain	H-NOX domain	CATH (4.3.0)
B	3.90.1520.10	Alpha Beta	Alpha-Beta Complex	H-NOX domain	H-NOX domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF07700	Haem-NO-binding (HNOB)	Haem-NO-binding	The HNOB (Haem NO Binding) domain, is a predominantly alpha-helical domain and binds heme via a covalent linkage to histidine. It is a haem protein sensor (SONO) that displays femtomolar affinity for nitrous oxide, NO [3]. It is predicted to function ...	The HNOB (Haem NO Binding) domain, is a predominantly alpha-helical domain and binds heme via a covalent linkage to histidine. It is a haem protein sensor (SONO) that displays femtomolar affinity for nitrous oxide, NO [3]. It is predicted to function as a haem-dependent sensor for gaseous ligands and to transduce diverse downstream signals in both bacteria and animals.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	NO-binding heme-dependent sensor protein	binding tetrapyrrole binding heme binding cation binding ion binding metal ion binding small molecule binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR038158	H-NOX domain superfamily	Homologous Superfamily
A, B	IPR024096	NO signalling/Golgi transport ligand-binding domain superfamily	Homologous Superfamily
A, B	IPR011644	Heme NO-binding	Domain

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