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Guidelines

MIRAGE

cytochrome b5 reductase 4

Summary

Gene Symbol

Cyb5r4

Organism

Mus musculus (house mouse)

External Links

NCBI Gene

266690

PubChem

266690

Alliance of Genome Resources

MGI:2386848

Annotation

Keyword

Acetylation
Alternative splicing
Endoplasmic reticulum
FAD
Heme
NAD
Oxidoreductase
Reference proteome

Proteins

Displaying 1 entry
UniProt	Protein Name
Q3TDX8	Flavohemoprotein b5/b5R N-terminal cytochrome b5 and cytochrome b5 oxidoreductase domain-containing protein cb5/cb5R

Annotation information from UniProt.

Gene Ontology (GO)

Displaying entries **1 - 5** of 10 in total

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GO Term	Evidence Code	PMID
NADP metabolic process	ISO
superoxide metabolic process	ISO
superoxide metabolic process	IBA
superoxide metabolic process	IEA
insulin secretion	IMP	15247412

GO Hierarchy

biological process

metabolic process [inference]

nitrogen compound metabolic process [inference]

cellular nitrogen compound metabolic process [inference]

nucleobase-containing compound metabolic process [inference]

nucleobase-containing small molecule metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

purine-containing compound metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine-containing compound metabolic process [inference]

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

organonitrogen compound metabolic process [inference]

tetrapyrrole metabolic process [inference]

porphyrin-containing compound metabolic process [inference]

heme metabolic process

purine-containing compound metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine-containing compound metabolic process [inference]

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

pigment metabolic process [inference]

heme metabolic process

cellular metabolic process [inference]

cellular aromatic compound metabolic process [inference]

nucleobase-containing compound metabolic process [inference]

nucleobase-containing small molecule metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

tetrapyrrole metabolic process [inference]

porphyrin-containing compound metabolic process [inference]

heme metabolic process

purine-containing compound metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

phosphorus metabolic process [inference]

phosphate-containing compound metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

organophosphate metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

cellular nitrogen compound metabolic process [inference]

nucleobase-containing compound metabolic process [inference]

nucleobase-containing small molecule metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

purine-containing compound metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine-containing compound metabolic process [inference]

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

heterocycle metabolic process [inference]

nucleobase-containing compound metabolic process [inference]

nucleobase-containing small molecule metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

tetrapyrrole metabolic process [inference]

porphyrin-containing compound metabolic process [inference]

heme metabolic process

purine-containing compound metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine-containing compound metabolic process [inference]

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

reactive oxygen species metabolic process

superoxide metabolic process

primary metabolic process [inference]

nucleobase-containing compound metabolic process [inference]

nucleobase-containing small molecule metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

small molecule metabolic process [inference]

nucleobase-containing small molecule metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

organic substance metabolic process [inference]

organophosphate metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

organic cyclic compound metabolic process [inference]

nucleobase-containing compound metabolic process [inference]

nucleobase-containing small molecule metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

tetrapyrrole metabolic process [inference]

porphyrin-containing compound metabolic process [inference]

heme metabolic process

purine-containing compound metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine-containing compound metabolic process [inference]

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

organonitrogen compound metabolic process [inference]

tetrapyrrole metabolic process [inference]

porphyrin-containing compound metabolic process [inference]

heme metabolic process

purine-containing compound metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine-containing compound metabolic process [inference]

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

cellular process [inference]

cellular metabolic process [inference]

cellular aromatic compound metabolic process [inference]

nucleobase-containing compound metabolic process [inference]

nucleobase-containing small molecule metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

tetrapyrrole metabolic process [inference]

porphyrin-containing compound metabolic process [inference]

heme metabolic process

purine-containing compound metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

phosphorus metabolic process [inference]

phosphate-containing compound metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

organophosphate metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

cellular nitrogen compound metabolic process [inference]

nucleobase-containing compound metabolic process [inference]

nucleobase-containing small molecule metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

purine-containing compound metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine-containing compound metabolic process [inference]

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

heterocycle metabolic process [inference]

nucleobase-containing compound metabolic process [inference]

nucleobase-containing small molecule metabolic process [inference]

nucleoside phosphate metabolic process [inference]

nucleotide metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

tetrapyrrole metabolic process [inference]

porphyrin-containing compound metabolic process [inference]

heme metabolic process

purine-containing compound metabolic process [inference]

purine nucleotide metabolic process [inference]

NADP metabolic process

pyridine-containing compound metabolic process [inference]

pyridine nucleotide metabolic process [inference]

nicotinamide nucleotide metabolic process [inference]

NADP metabolic process

reactive oxygen species metabolic process

superoxide metabolic process

cellular developmental process [inference]

cell development

cellular localization [inference]

cellular macromolecule localization [inference]

protein localization [inference]

establishment of protein localization [inference]

protein transport [inference]

protein secretion [inference]

insulin secretion

establishment of protein localization to extracellular region [inference]

protein secretion [inference]

insulin secretion

protein localization to extracellular region [inference]

establishment of protein localization to extracellular region [inference]

protein secretion [inference]

insulin secretion

export from cell [inference]

secretion by cell [inference]

protein secretion [inference]

insulin secretion

signal release [inference]

hormone secretion [inference]

peptide hormone secretion [inference]

insulin secretion

developmental process [inference]

anatomical structure development [inference]

cell development

cellular developmental process [inference]

cell development

homeostatic process [inference]

chemical homeostasis [inference]

carbohydrate homeostasis [inference]

glucose homeostasis

response to stimulus [inference]

response to chemical [inference]

response to antibiotic

localization [inference]

macromolecule localization [inference]

cellular macromolecule localization [inference]

protein localization [inference]

establishment of protein localization [inference]

protein transport [inference]

protein secretion [inference]

insulin secretion

establishment of protein localization to extracellular region [inference]

protein secretion [inference]

insulin secretion

protein localization to extracellular region [inference]

establishment of protein localization to extracellular region [inference]

protein secretion [inference]

insulin secretion

establishment of localization [inference]

transport [inference]

hormone transport [inference]

hormone secretion [inference]

peptide hormone secretion [inference]

insulin secretion

secretion [inference]

peptide secretion [inference]

peptide hormone secretion [inference]

insulin secretion

secretion by cell [inference]

protein secretion [inference]

insulin secretion

signal release [inference]

hormone secretion [inference]

peptide hormone secretion [inference]

insulin secretion

organic substance transport [inference]

protein transport [inference]

protein secretion [inference]

insulin secretion

peptide transport [inference]

peptide secretion [inference]

peptide hormone secretion [inference]

insulin secretion

nitrogen compound transport [inference]

protein transport [inference]

protein secretion [inference]

insulin secretion

amide transport [inference]

peptide transport [inference]

peptide secretion [inference]

peptide hormone secretion [inference]

insulin secretion

export from cell [inference]

secretion by cell [inference]

protein secretion [inference]

insulin secretion

signal release [inference]

hormone secretion [inference]

peptide hormone secretion [inference]

insulin secretion

establishment of protein localization [inference]

protein transport [inference]

protein secretion [inference]

insulin secretion

establishment of protein localization to extracellular region [inference]

protein secretion [inference]

insulin secretion

cellular localization [inference]

cellular macromolecule localization [inference]

protein localization [inference]

establishment of protein localization [inference]

protein transport [inference]

protein secretion [inference]

insulin secretion

establishment of protein localization to extracellular region [inference]

protein secretion [inference]

insulin secretion

protein localization to extracellular region [inference]

establishment of protein localization to extracellular region [inference]

protein secretion [inference]

insulin secretion

biological regulation [inference]

regulation of biological quality [inference]

regulation of hormone levels [inference]

hormone transport [inference]

hormone secretion [inference]

peptide hormone secretion [inference]

insulin secretion

Displaying entries **1 - 5** of 7 in total

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GO Term	Evidence Code	PMID
cytoplasm	ISO	10611283
cytoplasm	IBA
endoplasmic reticulum	ISO
endoplasmic reticulum	IDA	15131110
endoplasmic reticulum	IBA

GO Hierarchy

cellular component

cellular anatomical entity [inference]

cytoplasm

organelle [inference]

membrane-bounded organelle [inference]

intracellular membrane-bounded organelle [inference]

endoplasmic reticulum

intracellular organelle [inference]

intracellular membrane-bounded organelle [inference]

endoplasmic reticulum

perinuclear region of cytoplasm

Displaying entries **1 - 5** of 12 in total

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GO Term	Evidence Code	PMID
NADPH-hemoprotein reductase activity	ISO
cytochrome-b5 reductase activity, acting on NAD(P)H	ISO	10611283
cytochrome-b5 reductase activity, acting on NAD(P)H	IDA	15131110
cytochrome-b5 reductase activity, acting on NAD(P)H	IBA
protein binding	IPI	14739275

GO Hierarchy

molecular function

catalytic activity [inference]

oxidoreductase activity [inference]

oxidoreductase activity, acting on NAD(P)H [inference]

oxidoreductase activity, acting on NAD(P)H, heme protein as acceptor

oxidoreductase activity, acting on NAD(P)H, oxygen as acceptor [inference]

NAD(P)H oxidase H2O2-forming activity

binding [inference]

protein binding

small molecule binding [inference]

heterocyclic compound binding [inference]

nucleotide binding [inference]

flavin adenine dinucleotide binding

ion binding [inference]

anion binding [inference]

flavin adenine dinucleotide binding

cation binding [inference]

metal ion binding

organic cyclic compound binding [inference]

tetrapyrrole binding [inference]

heme binding

nucleoside phosphate binding [inference]

nucleotide binding [inference]

flavin adenine dinucleotide binding

Gene Ontology information from NCBI Gene and UniProt.

OrthoDB (Group)

Group level

Eukaryota

Group Name

nitrate reductase

Functional Category

C: Energy production and conversion
I: Lipid transport and metabolism
T: Signal transduction mechanisms

Displaying **all 7** entries
Gene Ontology
heme binding
metal ion binding
molybdenum ion binding
molybdopterin cofactor binding
oxidoreductase activity
sulfite oxidase activity
sulfur compound metabolic process

Displaying **all 8** entries
InterPro
Cytochrome b5, heme-binding site
Cytochrome b5-like heme/steroid binding domain superfamily
Cytochrome b5-like heme/steroid binding domain
Eukaryotic molybdopterin oxidoreductase
Immunoglobulin E-set
Moybdenum cofactor oxidoreductase, dimerisation
Oxidoreductase, molybdopterin-binding domain superfamily
Oxidoreductase, molybdopterin-binding domain

Disease

Disease Ontology

Displaying 1 entry
DO ID	Disease Name	Source
DOID:9352	type 2 diabetes mellitus	Alliance of Genome Resources

Ortholog

Displaying entries **81 - 84** of 84 in total

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Species	Gene ID	Alliance of Genome Resources	Orthologous MAtrix
Corvus moneduloides	116442206		CORMO19216
Rhinolophus ferrumequinum	117020586		RHIFE10349
Balaenoptera musculus	118905259		BALMU27467
Homo sapiens	123956252		HUMAN85642

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Last updated: December 8, 2025