Annotations: 8GZ3

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
E [auth N]	7tm_1	e8gz3N1	A: a/b three-layered sandwiches	X: RNase A-like	H: Cytochrome P450	T: Cytochrome P450	F: 7tm_1	ECOD (v294.1)
B	Glyco_transf_88	e8gz3B01	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: FAD/NAD(P)-binding domain	F: Glyco_transf_88	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.40.30.10	Mainly Beta	Beta Barrel	Elongation Factor Tu (Ef-tu)	domain 3	CATH (utative)
B	3.40.50.80	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Nucleotide-binding domain of ferredoxin-NADP reductase (FNR) module	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
E [auth N]	Heavy Chain	IGHV3	-	7d5 fab light chain \| 7d5 fab heavy chain	SAbDab (2026-03-27)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B	PF08022	FAD-binding domain (FAD_binding_8)	FAD-binding domain	This entry represents FAD binding domain that is associated with ferric reductase NAD binding proteins and the heavy chain of Cytochrome b-245. Members of this group are predominantly found in eukaryotes and bacteria.	Domain
B	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
B	PF08030	Ferric reductase NAD binding domain (NAD_binding_6)	Ferric reductase NAD binding domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Cytochrome b-245 light chain	electron transfer activity SH3 domain binding protein binding binding protein domain specific binding cation binding ion binding metal ion binding small molecule binding protein heterodimerization activity protein dimerization activity tetrapyrrole binding heme binding oxidoreductase activity electron transfer activity SH3 domain binding protein binding binding protein domain specific binding cation binding ion binding metal ion binding small molecule binding protein heterodimerization activity protein dimerization activity tetrapyrrole binding heme binding oxidoreductase activity superoxide-generating NAD(P)H oxidase activity oxidoreductase activity, acting on NAD(P)H catalytic activity oxidoreductase activity, acting on NAD(P)H, oxygen as acceptor	response to stimulus response to chemical response to xenobiotic stimulus regulation of biological process regulation of cellular process reactive oxygen species metabolic process biological regulation positive regulation of biological process regulation of superoxide metabolic process positive regulation of reactive oxygen species metabolic process superoxide metabolic process positive regulation of metabolic process superoxide anion generation metabolic process response to stimulus response to chemical response to xenobiotic stimulus regulation of biological process regulation of cellular process reactive oxygen species metabolic process biological regulation positive regulation of biological process regulation of superoxide metabolic process positive regulation of reactive oxygen species metabolic process superoxide metabolic process positive regulation of metabolic process superoxide anion generation metabolic process cellular process positive regulation of superoxide anion generation regulation of superoxide anion generation regulation of metabolic process regulation of reactive oxygen species metabolic process positive regulation of cellular process biological process involved in interspecies interaction between organisms immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus immune system process defense response to other organism response to stress innate immune response response to external biotic stimulus regulation of body fluid levels multicellular organismal process secretion by tissue secretion transport mucus secretion establishment of localization body fluid secretion localization regulation of biological quality regulation of localization import into cell positive regulation of cellular component organization regulation of cellular component organization vesicle-mediated transport cellular component organization positive regulation of endocytosis phagocytosis cellular component organization or biogenesis regulation of endocytosis regulation of transport regulation of phagocytosis regulation of vesicle-mediated transport positive regulation of phagocytosis positive regulation of transport endocytosis cellular response to stimulus response to ketone response to lipid response to alcohol response to oxygen-containing compound cellular response to oxygen-containing compound cellular response to chemical stimulus response to phorbol 13-acetate 12-myristate cellular response to alcohol cellular response to phorbol 13-acetate 12-myristate cellular response to lipid cellular response to ketone cellular response to acid chemical cellular response to nitrogen compound cellular response to amino acid stimulus cellular response to L-glutamine response to L-glutamine response to nitrogen compound response to amino acid response to acid chemical regulation of defense response positive regulation of response to biotic stimulus regulation of response to biotic stimulus regulation of response to external stimulus positive regulation of response to stimulus defense response to bacterium positive regulation of defense response to bacterium positive regulation of response to external stimulus regulation of response to stress response to bacterium regulation of defense response to bacterium regulation of response to stimulus positive regulation of defense response cell population proliferation regulation of smooth muscle cell proliferation positive regulation of cell population proliferation smooth muscle cell proliferation positive regulation of smooth muscle cell proliferation regulation of cell population proliferation muscle cell proliferation response to decreased oxygen levels response to hypoxia response to oxygen levels response to abiotic stimulus reactive oxygen species biosynthetic process biosynthetic process hydrogen peroxide metabolic process hydrogen peroxide biosynthetic process response to aldosterone response to endogenous stimulus response to mineralocorticoid response to corticosteroid response to hormone response to steroid hormone response to nutrient levels regulation of calcium ion transport monoatomic ion transmembrane transport regulation of monoatomic ion transmembrane transport calcium ion transport metal ion transport regulation of calcium ion transmembrane transport monoatomic cation transmembrane transport intercellular transport monoatomic ion transport monoatomic cation transport regulation of metal ion transport calcium ion transmembrane import into cytosol regulation of release of sequestered calcium ion into cytosol regulation of monoatomic ion transport transmembrane transport release of sequestered calcium ion into cytosol regulation of transmembrane transport regulation of monoatomic cation transmembrane transport calcium ion transmembrane transport cytochrome complex assembly cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly regulation of growth growth positive regulation of cell growth regulation of cell growth cell growth positive regulation of growth cellular response to ionizing radiation cellular response to radiation cellular response to environmental stimulus response to ionizing radiation cellular response to gamma radiation response to radiation cellular response to abiotic stimulus response to gamma radiation interleukin-6 production positive regulation of macromolecule biosynthetic process positive regulation of interleukin-6 production regulation of interleukin-6 production positive regulation of biosynthetic process regulation of cytokine production cytokine production regulation of multicellular organismal process positive regulation of macromolecule metabolic process regulation of biosynthetic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression positive regulation of gene expression positive regulation of multicellular organismal process regulation of macromolecule biosynthetic process macromolecule metabolic process positive regulation of cytokine production homeostatic process cellular response to glucose stimulus intracellular glucose homeostasis response to hexose cellular response to carbohydrate stimulus cellular homeostasis response to monosaccharide response to carbohydrate chemical homeostasis response to glucose glucose homeostasis carbohydrate homeostasis cellular response to hexose stimulus intracellular chemical homeostasis cellular response to monosaccharide stimulus response to activity positive regulation of cell communication immune response-regulating cell surface receptor signaling pathway positive regulation of signal transduction pattern recognition receptor signaling pathway regulation of signal transduction cell communication immune response-activating signaling pathway positive regulation of immune response regulation of immune system process signal transduction positive regulation of immune system process cell surface toll-like receptor signaling pathway innate immune response-activating signaling pathway positive regulation of pattern recognition receptor signaling pathway immune response-activating cell surface receptor signaling pathway regulation of innate immune response regulation of toll-like receptor 2 signaling pathway regulation of pattern recognition receptor signaling pathway activation of innate immune response regulation of immune response activation of immune response signaling innate immune response activating cell surface receptor signaling pathway positive regulation of toll-like receptor 2 signaling pathway immune response-regulating signaling pathway toll-like receptor 2 signaling pathway cell surface pattern recognition receptor signaling pathway regulation of signaling positive regulation of innate immune response cell surface receptor signaling pathway regulation of cell communication positive regulation of signaling response to peptide response to cytokine response to interleukin-1 cellular localization establishment of localization in cell cellular response to tumor necrosis factor cellular response to cytokine stimulus response to tumor necrosis factor regulation of systemic arterial blood pressure by renin-angiotensin regulation of systemic arterial blood pressure by hormone system process negative regulation of renal output by angiotensin regulation of blood volume by renin-angiotensin regulation of systemic arterial blood pressure mediated by a chemical signal positive regulation of systemic arterial blood pressure regulation of renal system process negative regulation of glomerular filtration by angiotensin regulation of system process negative regulation of biological process positive regulation of blood pressure negative regulation of glomerular filtration regulation of glomerular filtration circulatory system process regulation of renal output by angiotensin glomerular filtration renal filtration blood circulation renal system process regulation of blood pressure regulation of systemic arterial blood pressure endocrine process negative regulation of multicellular organismal process response to mechanical stimulus cellular response to mechanical stimulus cellular response to external stimulus positive regulation of reactive oxygen species biosynthetic process regulation of reactive oxygen species biosynthetic process regulation of mucus secretion regulation of secretion positive regulation of secretion positive regulation of mucus secretion respiratory burst muscle hypertrophy muscle adaptation smooth muscle adaptation muscle system process smooth muscle hypertrophy inflammatory response regulation of tumor necrosis factor production positive regulation of tumor necrosis factor superfamily cytokine production tumor necrosis factor superfamily cytokine production positive regulation of tumor necrosis factor production tumor necrosis factor production regulation of tumor necrosis factor superfamily cytokine production endothelial cell proliferation positive regulation of epithelial cell proliferation regulation of endothelial cell proliferation positive regulation of endothelial cell proliferation regulation of epithelial cell proliferation epithelial cell proliferation response to angiotensin response to peptide hormone cellular response to peptide hormone stimulus cellular response to angiotensin cellular response to endogenous stimulus cellular response to hormone stimulus	membrane-bounded organelle intracellular anatomical structure membrane intracellular vesicle intracellular membrane-bounded organelle endomembrane system specific granule membrane intracellular organelle cytoplasmic vesicle membrane cellular anatomical structure bounding membrane of organelle vesicle membrane cytoplasmic vesicle organelle membrane-bounded organelle intracellular anatomical structure membrane intracellular vesicle intracellular membrane-bounded organelle endomembrane system specific granule membrane intracellular organelle cytoplasmic vesicle membrane cellular anatomical structure bounding membrane of organelle vesicle membrane cytoplasmic vesicle organelle secretory granule secretory vesicle cytoplasm vesicle organelle membrane secretory granule membrane specific granule somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection perinuclear endoplasmic reticulum perinuclear region of cytoplasm endoplasmic reticulum phagocytic vesicle phagocytic vesicle membrane endocytic vesicle membrane endocytic vesicle actin filament bundle intracellular membraneless organelle actin cytoskeleton actomyosin cytoskeleton membraneless organelle stress fiber contractile actin filament bundle cell body neuronal cell body tertiary granule membrane tertiary granule anchoring junction cell junction focal adhesion cell-substrate junction cell periphery apical part of cell plasma membrane plasma membrane region apical plasma membrane protein-containing complex catalytic complex plasma membrane protein complex NADPH oxidase complex membrane protein complex oxidoreductase complex organelle subcompartment endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum membrane endosome
C [auth L]	7D5 Fab light chain	-	-	-
D [auth H]	7D5 Fab heavy chain	-	-	-
E [auth N]	Green Fluorescent Protein, Anti-Fab (kappa) nanobody[TP1170] chimera	-	-	-
B	Cytochrome b-245 heavy chain	FAD binding flavin adenine dinucleotide binding binding nucleoside phosphate binding ion binding anion binding nucleotide binding heterocyclic compound binding small molecule binding protein heterodimerization activity protein binding protein dimerization activity NAD(P)H oxidase H2O2-forming activity oxidoreductase activity FAD binding flavin adenine dinucleotide binding binding nucleoside phosphate binding ion binding anion binding nucleotide binding heterocyclic compound binding small molecule binding protein heterodimerization activity protein binding protein dimerization activity NAD(P)H oxidase H2O2-forming activity oxidoreductase activity oxidoreductase activity, acting on NAD(P)H catalytic activity oxidoreductase activity, acting on NAD(P)H, oxygen as acceptor purine nucleotide binding adenyl nucleotide binding NADPH binding NADP binding tetrapyrrole binding heme binding superoxide-generating NAD(P)H oxidase activity superoxide-generating NADPH oxidase activity cation binding metal ion binding	response to stimulus response to chemical response to xenobiotic stimulus superoxide metabolic process superoxide anion generation reactive oxygen species metabolic process metabolic process cellular process biological process involved in interspecies interaction between organisms immune response response to other organism defense response defense response to symbiont response to external stimulus response to stimulus response to chemical response to xenobiotic stimulus superoxide metabolic process superoxide anion generation reactive oxygen species metabolic process metabolic process cellular process biological process involved in interspecies interaction between organisms immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus immune system process defense response to other organism response to stress innate immune response response to external biotic stimulus transmembrane transport localization transport monoatomic ion transmembrane transport monoatomic ion transport establishment of localization response to angiotensin response to hormone response to endogenous stimulus response to peptide hormone response to oxygen-containing compound response to nitrogen compound cellular response to acid chemical cellular response to stimulus cellular response to nitrogen compound cellular response to amino acid stimulus cellular response to L-glutamine response to L-glutamine response to amino acid cellular response to oxygen-containing compound response to acid chemical cellular response to chemical stimulus response to alcohol cellular response to alcohol cellular response to ethanol response to ethanol multicellular organismal process regulation of developmental process positive regulation of biological process angiogenesis regulation of vasculature development positive regulation of developmental process multicellular organism development tube morphogenesis anatomical structure development regulation of multicellular organismal process regulation of anatomical structure morphogenesis blood vessel development system development developmental process regulation of multicellular organismal development regulation of biological process blood vessel morphogenesis tube development biological regulation positive regulation of angiogenesis vasculature development circulatory system development anatomical structure morphogenesis positive regulation of vasculature development regulation of angiogenesis anatomical structure formation involved in morphogenesis positive regulation of multicellular organismal process reactive oxygen species biosynthetic process biosynthetic process hydrogen peroxide metabolic process hydrogen peroxide biosynthetic process response to aldosterone response to ketone response to lipid response to mineralocorticoid response to corticosteroid response to steroid hormone response to decreased oxygen levels regulation of cellular process cellular response to oxygen levels signaling cellular response to hypoxia cellular response to decreased oxygen levels intracellular signal transduction cell communication cellular response to stress response to hypoxia hypoxia-inducible factor-1alpha signaling pathway response to oxygen levels response to abiotic stimulus signal transduction respiratory burst inflammatory response regulation of tumor necrosis factor production positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of tumor necrosis factor superfamily cytokine production positive regulation of biosynthetic process cytokine production regulation of cytokine production positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of biosynthetic process tumor necrosis factor superfamily cytokine production positive regulation of tumor necrosis factor production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process tumor necrosis factor production regulation of gene expression regulation of tumor necrosis factor superfamily cytokine production positive regulation of gene expression regulation of macromolecule biosynthetic process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process response to nutrient levels response to nutrient cellular response to metal ion response to metal ion cellular response to cadmium ion response to cadmium ion	membrane-bounded organelle intracellular anatomical structure tertiary granule membrane membrane intracellular vesicle intracellular membrane-bounded organelle endomembrane system tertiary granule intracellular organelle cytoplasmic vesicle membrane cellular anatomical structure bounding membrane of organelle vesicle membrane cytoplasmic vesicle membrane-bounded organelle intracellular anatomical structure tertiary granule membrane membrane intracellular vesicle intracellular membrane-bounded organelle endomembrane system tertiary granule intracellular organelle cytoplasmic vesicle membrane cellular anatomical structure bounding membrane of organelle vesicle membrane cytoplasmic vesicle organelle secretory granule secretory vesicle cytoplasm vesicle organelle membrane secretory granule membrane specific granule membrane specific granule organelle envelope nuclear envelope nucleus cell periphery plasma membrane protein-containing complex catalytic complex plasma membrane protein complex NADPH oxidase complex membrane protein complex oxidoreductase complex somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection perinuclear endoplasmic reticulum perinuclear region of cytoplasm endoplasmic reticulum organelle subcompartment endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum membrane phagocytic vesicle phagocytic vesicle membrane endocytic vesicle membrane endocytic vesicle cell body neuronal cell body transmembrane transporter complex transporter complex monoatomic ion channel complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR007732	Cytochrome b558 alpha-subunit	Family
B	IPR017938	Riboflavin synthase-like beta-barrel	Homologous Superfamily
B	IPR013130	Ferric reductase transmembrane component-like domain	Domain
B	IPR013112	FAD-binding 8	Domain
B	IPR039261	Ferredoxin-NADP reductase (FNR), nucleotide-binding domain	Homologous Superfamily
B	IPR050369	Respiratory burst oxidase/Ferric reductase	Family
B	IPR000778	Cytochrome b245, heavy chain	Family
B	IPR017927	FAD-binding domain, ferredoxin reductase-type	Domain
B	IPR013121	Ferric reductase, NAD binding domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P13498	chronic granulomatous disease granulomatous disease, chronic, autosomal recessive, cytochrome b-negative Liver Cirrhosis, Experimental atherosclerosis type 2 diabetes mellitus chronic kidney disease hypertensive disorder kidney failure cirrhosis of liver heart disease interstitial cystitis malignant pancreatic neoplasm ovarian cancer phagocyte bactericidal dysfunction psoriasis chronic granulomatous disease granulomatous disease, chronic, autosomal recessive, cytochrome b-negative Liver Cirrhosis, Experimental atherosclerosis type 2 diabetes mellitus chronic kidney disease hypertensive disorder kidney failure cirrhosis of liver heart disease interstitial cystitis malignant pancreatic neoplasm ovarian cancer phagocyte bactericidal dysfunction psoriasis cutaneous lupus erythematosus esophageal adenocarcinoma invasive ductal breast carcinoma lung carcinoma maturity-onset diabetes of the young pancreatic ductal adenocarcinoma arteriosclerosis disorder pilocytic astrocytoma granulomatous disease, chronic, X-linked malignant ependymoma osteosarcoma periodontitis plasma cell myeloma Barrett esophagus subependymal giant cell astrocytoma glioblastoma
B	Pharos: P04839	chronic granulomatous disease X-linked mendelian susceptibility to mycobacterial diseases due to CYBB deficiency granulomatous disease, chronic, X-linked diabetes mellitus hypertensive disorder brain infarction Myocardial Reperfusion Injury chronic kidney disease proteinuria kidney disease congestive heart failure subependymal giant cell astrocytoma heart failure IgA glomerulonephritis invasive ductal breast carcinoma chronic granulomatous disease X-linked mendelian susceptibility to mycobacterial diseases due to CYBB deficiency granulomatous disease, chronic, X-linked diabetes mellitus hypertensive disorder brain infarction Myocardial Reperfusion Injury chronic kidney disease proteinuria kidney disease congestive heart failure subependymal giant cell astrocytoma heart failure IgA glomerulonephritis invasive ductal breast carcinoma adrenal cortex carcinoma large cell medulloblastoma lung cancer atypical teratoid rhabdoid tumor MALT lymphoma ovarian cancer cutaneous lupus erythematosus pilocytic astrocytoma Sjogren syndrome head and neck cancer tuberculosis inborn carbohydrate metabolic disorder ischemia reperfusion injury astrocytic tumor lung carcinoma medulloblastoma non-small cell lung carcinoma chronic obstructive pulmonary disease pancreatic intraductal papillary-mucinous neoplasm glioblastoma ulcerative colitis interstitial cystitis atherosclerosis malignant glioma B-cell chronic lymphocytic leukemia osteosarcoma phagocyte bactericidal dysfunction

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B	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, B	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.