Annotations: 7TAI

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth A]	WD40	e7taiA1	A: a/b three-layered sandwiches	X: RNase A-like	H: Cytochrome P450	T: Cytochrome P450	F: WD40	ECOD (v294.1)
C	WD40	e7taiC1	A: a/b three-layered sandwiches	X: RNase A-like	H: Cytochrome P450	T: Cytochrome P450	F: WD40	ECOD (v294.1)
A [auth B]	WD40	e7taiB1	A: a/b three-layered sandwiches	X: RNase A-like	H: Cytochrome P450	T: Cytochrome P450	F: WD40	ECOD (v294.1)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A], C	PF03807	NADP oxidoreductase coenzyme F420-dependent (F420_oxidored)	NADP oxidoreductase coenzyme F420-dependent	-	Family
A [auth B], B [auth A], C	PF01794	Ferric reductase like transmembrane component (Ferric_reduct)	Ferric reductase like transmembrane component	This family includes a common region in the transmembrane proteins mammalian cytochrome B-245 heavy chain (gp91-phox), ferric reductase transmembrane component in yeast and respiratory burst oxidase from mouse-ear cress. This may be a family of flavo ...	This family includes a common region in the transmembrane proteins mammalian cytochrome B-245 heavy chain (gp91-phox), ferric reductase transmembrane component in yeast and respiratory burst oxidase from mouse-ear cress. This may be a family of flavocytochromes capable of moving electrons across the plasma membrane [1]. The Frp1 protein Swiss:Q04800 from S. pombe is a ferric reductase component and is required for cell surface ferric reductase activity, mutants in frp1 are deficient in ferric iron uptake [1]. Cytochrome B-245 heavy chain Swiss:P04839 is a FAD-dependent dehydrogenase it is also has electron transferase activity which reduces molecular oxygen to superoxide anion, a precursor in the production of microbicidal oxidants [2]. Mutations in the sequence of cytochrome B-245 heavy chain (gp91-phox) lead to the X-linked chronic granulomatous disease. The bacteriocidal ability of phagocytic cells is reduced and is characterised by the absence of a functional plasma membrane associated NADPH oxidase [3]. The chronic granulomatous disease gene codes for the beta chain of cytochrome B-245 and cytochrome B-245 is missing from patients with the disease [4].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], B [auth A], C	Metalloreductase STEAP2	oxidoreductase activity, acting on metal ions oxidoreductase activity ferric-chelate reductase (NADPH) activity oxidoreductase activity, acting on metal ions, NAD or NADP as acceptor ferric-chelate reductase activity catalytic activity cation binding ion binding binding metal ion binding small molecule binding cupric reductase (NADH) activity	localization transport copper ion import copper ion transport transition metal ion transport monoatomic ion transport monoatomic cation transport establishment of localization metal ion transport import into cell copper ion transmembrane transport import across plasma membrane monoatomic ion transmembrane transport inorganic cation import across plasma membrane localization transport copper ion import copper ion transport transition metal ion transport monoatomic ion transport monoatomic cation transport establishment of localization metal ion transport import into cell copper ion transmembrane transport import across plasma membrane monoatomic ion transmembrane transport inorganic cation import across plasma membrane transmembrane transport monoatomic cation transmembrane transport plasma membrane copper ion transport inorganic ion import across plasma membrane copper ion import across plasma membrane cellular process Golgi to plasma membrane transport cellular localization post-Golgi vesicle-mediated transport localization within membrane vesicle-mediated transport vesicle-mediated transport to the plasma membrane Golgi vesicle transport inorganic ion homeostasis iron import into cell homeostatic process intracellular iron ion homeostasis intracellular monoatomic cation homeostasis establishment of localization in cell monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis iron ion import across plasma membrane intracellular monoatomic ion homeostasis iron ion transport iron ion transmembrane transport cellular homeostasis chemical homeostasis regulated exocytosis secretion by cell exocytosis secretion export from cell endocytosis response to stimulus response to hormone response to endogenous stimulus response to chemical	membrane-bounded organelle intracellular anatomical structure early endosome endosome intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cellular anatomical structure cytoplasmic vesicle organelle cytoplasm vesicle transport vesicle membrane-bounded organelle intracellular anatomical structure early endosome endosome intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cellular anatomical structure cytoplasmic vesicle organelle cytoplasm vesicle transport vesicle trans-Golgi network transport vesicle clathrin-coated vesicle coated vesicle Golgi-associated vesicle Golgi membrane Golgi apparatus membrane bounding membrane of organelle organelle membrane cytosol endosome membrane cytoplasmic vesicle membrane vesicle membrane cell periphery plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A], C	IPR013130	Ferric reductase transmembrane component-like domain	Domain
A [auth B], B [auth A], C	IPR028939	Pyrroline-5-carboxylate reductase, catalytic, N-terminal	Domain
A [auth B], B [auth A], C	IPR036291	NAD(P)-binding domain superfamily	Homologous Superfamily
A [auth B], B [auth A], C	IPR051267	STEAP family metalloreductases	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth B], B [auth A], C	Pharos: Q8NFT2	astrocytic tumor glioblastoma large cell medulloblastoma malignant glioma ovarian cancer primitive neuroectodermal tumor atypical teratoid rhabdoid tumor interstitial cystitis lung adenocarcinoma medulloblastoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia subependymal giant cell astrocytoma cystic fibrosis invasive ductal breast carcinoma malignant ependymoma astrocytic tumor glioblastoma large cell medulloblastoma malignant glioma ovarian cancer primitive neuroectodermal tumor atypical teratoid rhabdoid tumor interstitial cystitis lung adenocarcinoma medulloblastoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia subependymal giant cell astrocytoma cystic fibrosis invasive ductal breast carcinoma malignant ependymoma oligodendroglioma Pick disease transitional cell carcinoma

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth B], B [auth A], C	OPM	Transmembrane	Alpha-helical polytopic	Electron transport chain complex II superfamily	Transmembrane ferric reductase

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A [auth B], B [auth A], C	PDBTM	Annotated as membrane protein by PDBTM

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.