Annotations: 4XMH

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Lipocalins	8085240	3001332	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	Triabin	e4xmhA1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Triabin	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF02087	Nitrophorin (Nitrophorin)	Nitrophorin	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Nitrophorin-7	oxidoreductase activity catalytic activity nitric oxide binding binding small molecule binding cation binding histamine binding ion binding organic cyclic compound binding heterocyclic compound binding metal ion binding	regulation of tube diameter multicellular organismal process system process biological process involved in interspecies interaction between organisms regulation of tube size biological regulation modulation of biological quality in another organism vasodilation in another organism circulatory system process vascular process in circulatory system blood vessel diameter maintenance regulation of biological quality modulation of process of another organism vasodilation regulation of tube diameter multicellular organismal process system process biological process involved in interspecies interaction between organisms regulation of tube size biological regulation modulation of biological quality in another organism vasodilation in another organism circulatory system process vascular process in circulatory system blood vessel diameter maintenance regulation of biological quality modulation of process of another organism vasodilation blood circulation regulation of anatomical structure size regulation of body fluid levels wound healing response to stimulus homotypic cell-cell adhesion cell activation hemostasis platelet aggregation blood coagulation cell adhesion cell-cell adhesion response to stress coagulation cellular process response to wounding platelet activation cellular homeostasis chemical homeostasis homeostatic process intracellular nitric oxide homeostasis intracellular chemical homeostasis regulation of biological process negative regulation of coagulation negative regulation of biological process regulation of multicellular organismal process negative regulation of multicellular organismal process regulation of coagulation response to histamine response to chemical response to nitrogen compound response to organic cyclic compound	cellular anatomical structure extracellular region
B	GLY-GLY-GLY	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR023613	Nitrophorin	Family
A	IPR012674	Calycin	Homologous Superfamily
A	IPR002351	Nitrophorin domain	Domain

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.