Annotations: 7U8G

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth D]	V-set_12	e7u8gD1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_12	ECOD (1.6)
D [auth E]	V-set	e7u8gE1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth D]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
D [auth E]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth D]	Heavy Chain	IGHV1	-	egfp, cytochrome b-245 heavy chain chimera	SAbDab (2025-02-28)
D [auth E]	Light Chain	IGKV1	Kappa	egfp, cytochrome b-245 heavy chain chimera	SAbDab (2025-02-28)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	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	EGFP, Cytochrome b-245 heavy chain chimera	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 tetrapyrrole binding heme binding oxidoreductase activity 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 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 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
B	Cytochrome b-245 light chain	oxidoreductase activity catalytic activity protein heterodimerization activity protein binding binding protein dimerization activity electron transfer activity SH3 domain binding protein domain specific binding tetrapyrrole binding heme binding cation binding ion binding metal ion binding oxidoreductase activity catalytic activity protein heterodimerization activity protein binding binding protein dimerization activity electron transfer activity SH3 domain binding protein domain specific binding tetrapyrrole binding heme binding cation binding ion binding metal ion binding small molecule binding	superoxide metabolic process superoxide anion generation reactive oxygen species metabolic process metabolic process cellular process interleukin-6 production multicellular organismal process regulation of cellular process positive regulation of biological process positive regulation of macromolecule biosynthetic process positive regulation of interleukin-6 production regulation of interleukin-6 production positive regulation of metabolic process positive regulation of biosynthetic process superoxide metabolic process superoxide anion generation reactive oxygen species metabolic process metabolic process cellular process interleukin-6 production multicellular organismal process regulation of cellular process positive regulation of biological process positive regulation of macromolecule biosynthetic process positive regulation of interleukin-6 production regulation of interleukin-6 production positive regulation of metabolic process positive regulation of biosynthetic process regulation of cytokine production cytokine production regulation of multicellular organismal process positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of biosynthetic process regulation of biological process biological regulation regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression biosynthetic process positive regulation of gene expression positive regulation of multicellular organismal process regulation of macromolecule biosynthetic process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process cellular response to stimulus positive regulation of cell communication positive regulation of response to biotic stimulus immune response-regulating cell surface receptor signaling pathway positive regulation of signal transduction response to stimulus pattern recognition receptor signaling pathway regulation of signal transduction response to biotic stimulus 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 response to other organism immune response-activating cell surface receptor signaling pathway regulation of innate immune response response to external stimulus regulation of toll-like receptor 2 signaling pathway regulation of response to stimulus defense response to other organism regulation of pattern recognition receptor signaling pathway positive regulation of defense response activation of innate immune response regulation of immune response activation of immune response regulation of defense response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of response to external stimulus signaling innate immune response activating cell surface receptor signaling pathway positive regulation of toll-like receptor 2 signaling pathway positive regulation of response to stimulus positive regulation of response to external stimulus immune response-regulating signaling pathway regulation of response to stress response to stress innate immune response toll-like receptor 2 signaling pathway response to external biotic stimulus cell surface pattern recognition receptor signaling pathway regulation of signaling positive regulation of innate immune response cell surface receptor signaling pathway defense response defense response to symbiont immune system process regulation of cell communication positive regulation of signaling regulation of body fluid levels 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 localization establishment of localization in cell defense response to bacterium positive regulation of defense response to bacterium response to bacterium regulation of defense response to bacterium reactive oxygen species biosynthetic process hydrogen peroxide metabolic process hydrogen peroxide biosynthetic process positive regulation of reactive oxygen species biosynthetic process regulation of reactive oxygen species biosynthetic process positive regulation of reactive oxygen species metabolic process regulation of reactive oxygen species metabolic process regulation of mucus secretion regulation of secretion positive regulation of secretion positive regulation of mucus secretion respiratory burst muscle hypertrophy system process 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 regulation of calcium ion transport intracellular calcium ion homeostasis negative regulation of biological process calcium ion transport monoatomic cation homeostasis monoatomic cation transport intracellular monoatomic ion homeostasis regulation of release of sequestered calcium ion into cytosol regulation of monoatomic ion transport inorganic ion transmembrane transport inorganic cation transmembrane transport maintenance of location transmembrane transport release of sequestered calcium ion into cytosol regulation of transmembrane transport chemical homeostasis inorganic ion homeostasis homeostatic process monoatomic ion transmembrane transport calcium ion homeostasis regulation of monoatomic ion transmembrane transport negative regulation of sequestering of calcium ion metal ion transport maintenance of location in cell regulation of calcium ion transmembrane transport monoatomic cation transmembrane transport intracellular monoatomic cation homeostasis monoatomic ion homeostasis negative regulation of cellular process monoatomic ion transport intracellular chemical homeostasis regulation of metal ion transport regulation of sequestering of calcium ion calcium ion transmembrane import into cytosol sequestering of calcium ion cellular homeostasis 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	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 cell periphery 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 endoplasmic reticulum membrane phagocytic vesicle phagocytic vesicle membrane endocytic vesicle membrane endocytic vesicle endosome
C [auth D]	7G5 - heavy chain	-	-	-
D [auth E]	7G5 - light chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

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

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	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 Myocardial Reperfusion Injury brain infarction 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 Myocardial Reperfusion Injury brain infarction 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 pilocytic astrocytoma cutaneous lupus erythematosus Sjogren syndrome tuberculosis head and neck cancer inborn carbohydrate metabolic disorder ischemia reperfusion injury astrocytic tumor lung carcinoma medulloblastoma non-small cell lung carcinoma pancreatic intraductal papillary-mucinous neoplasm chronic obstructive pulmonary disease glioblastoma ulcerative colitis interstitial cystitis atherosclerosis malignant glioma B-cell chronic lymphocytic leukemia osteosarcoma phagocyte bactericidal dysfunction
B	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

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Oxidoreductases	NADPH oxidase NOX2

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.