Annotations: 1I4Y

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
H	d1i4yh_	All alpha proteins	Four-helical up-and-down bundle	Hemerythrin-like	Hemerythrin-like	Hemerythrin	(Phascolopsis gouldii ) [TaxId: 6442 ],	SCOPe (2.08)
G	d1i4yg_	All alpha proteins	Four-helical up-and-down bundle	Hemerythrin-like	Hemerythrin-like	Hemerythrin	(Phascolopsis gouldii ) [TaxId: 6442 ],	SCOPe (2.08)
F	d1i4yf_	All alpha proteins	Four-helical up-and-down bundle	Hemerythrin-like	Hemerythrin-like	Hemerythrin	(Phascolopsis gouldii ) [TaxId: 6442 ],	SCOPe (2.08)
E	d1i4ye_	All alpha proteins	Four-helical up-and-down bundle	Hemerythrin-like	Hemerythrin-like	Hemerythrin	(Phascolopsis gouldii ) [TaxId: 6442 ],	SCOPe (2.08)
D	d1i4yd_	All alpha proteins	Four-helical up-and-down bundle	Hemerythrin-like	Hemerythrin-like	Hemerythrin	(Phascolopsis gouldii ) [TaxId: 6442 ],	SCOPe (2.08)
C	d1i4yc_	All alpha proteins	Four-helical up-and-down bundle	Hemerythrin-like	Hemerythrin-like	Hemerythrin	(Phascolopsis gouldii ) [TaxId: 6442 ],	SCOPe (2.08)
B	d1i4yb_	All alpha proteins	Four-helical up-and-down bundle	Hemerythrin-like	Hemerythrin-like	Hemerythrin	(Phascolopsis gouldii ) [TaxId: 6442 ],	SCOPe (2.08)
A	d1i4ya_	All alpha proteins	Four-helical up-and-down bundle	Hemerythrin-like	Hemerythrin-like	Hemerythrin	(Phascolopsis gouldii ) [TaxId: 6442 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
H	SCOP2B Superfamily	Hemerythrin-like	8018745	3001568	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	Hemerythrin-like	8018745	3001568	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Hemerythrin-like	8018745	3001568	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Hemerythrin-like	8018745	3001568	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Hemerythrin-like	8018745	3001568	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Hemerythrin-like	8018745	3001568	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Hemerythrin-like	8018745	3001568	SCOP2B (2022-06-29)
A	SCOP2 Family	Hemerythrin-like	8018744	4000819	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Hemerythrin-like	8018745	3001568	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)
H	Hemerythrin_1	e1i4yH1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Hemerythrin (From Topology)	T: Hemerythrin	F: Hemerythrin_1	ECOD (1.6)
G	Hemerythrin_1	e1i4yG1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Hemerythrin (From Topology)	T: Hemerythrin	F: Hemerythrin_1	ECOD (1.6)
F	Hemerythrin_1	e1i4yF1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Hemerythrin (From Topology)	T: Hemerythrin	F: Hemerythrin_1	ECOD (1.6)
E	Hemerythrin_1	e1i4yE1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Hemerythrin (From Topology)	T: Hemerythrin	F: Hemerythrin_1	ECOD (1.6)
D	Hemerythrin_1	e1i4yD1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Hemerythrin (From Topology)	T: Hemerythrin	F: Hemerythrin_1	ECOD (1.6)
C	Hemerythrin_1	e1i4yC1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Hemerythrin (From Topology)	T: Hemerythrin	F: Hemerythrin_1	ECOD (1.6)
B	Hemerythrin_1	e1i4yB1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Hemerythrin (From Topology)	T: Hemerythrin	F: Hemerythrin_1	ECOD (1.6)
A	Hemerythrin_1	e1i4yA1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Hemerythrin (From Topology)	T: Hemerythrin	F: Hemerythrin_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
H	1.20.120.50	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Hemerythrin-like	CATH (4.3.0)
G	1.20.120.50	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Hemerythrin-like	CATH (4.3.0)
F	1.20.120.50	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Hemerythrin-like	CATH (4.3.0)
E	1.20.120.50	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Hemerythrin-like	CATH (4.3.0)
D	1.20.120.50	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Hemerythrin-like	CATH (4.3.0)
C	1.20.120.50	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Hemerythrin-like	CATH (4.3.0)
B	1.20.120.50	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Hemerythrin-like	CATH (4.3.0)
A	1.20.120.50	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Hemerythrin-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F, G, H	PF01814	Hemerythrin HHE cation binding domain (Hemerythrin)	Hemerythrin HHE cation binding domain	Iteration of the HHE family ([2]) found it to be related to Hemerythrin. It also demonstrated that what has been described as a single domain ([1]) in fact consists of two cation binding domains. Members of this family occur all across nature and are ...	Iteration of the HHE family ([2]) found it to be related to Hemerythrin. It also demonstrated that what has been described as a single domain ([1]) in fact consists of two cation binding domains. Members of this family occur all across nature and are involved in a variety of processes. For instance, in Nereis diversicolor Swiss:P80255 binds Cadmium so as to protect the organism from toxicity ([3]). However Hemerythrin is classically described as Oxygen-binding through two attached Fe2+ ions. And the bacterial Swiss:Q7WX96 is a regulator of response to NO, which suggests yet another set-up for its metal ligands ([4]). In Staphylococcus aureus P72360 has been noted to be important when the organism switches to living in environments with low oxygen concentrations ([4]); perhaps this protein acts as an oxygen store or scavenger. This domain can bind oxygen (Matilla et.al., FEMS Microbiology Reviews, fuab043, 45, 2021, 1. https://doi.org/10.1093/femsre/fuab043)	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F, G, H	METHEMERYTHRIN	oxygen carrier activity molecular carrier activity cation binding transition metal ion binding iron ion binding ion binding binding metal ion binding small molecule binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F, G, H	IPR002063	Haemerythrin	Family
A, B, C, D, E A, B, C, D, E, F, G, H	IPR016131	Haemerythrin, iron-binding site	Binding Site
A, B, C, D, E A, B, C, D, E, F, G, H	IPR012312	Hemerythrin-like	Domain
A, B, C, D, E A, B, C, D, E, F, G, H	IPR035938	Hemerythrin-like superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H	IPR050669	Hemerythrin	Family
A, B, C, D, E A, B, C, D, E, F, G, H	IPR012827	Hemerythrin, metal-binding 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.