NDUFB2

gene
On this page

Also known as AGGGCI-AGGG

Summary

NDUFB2 (NADH:ubiquinone oxidoreductase subunit B2, HGNC:7697) is a protein-coding gene on chromosome 7q34, encoding NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 2, mitochondrial (O95178). Accessory subunit of the mitochondrial membrane respiratory chain NADH dehydrogenase (Complex I), that is believed not to be involved in catalysis. It is a selective cancer dependency (DepMap: 19.0% of cell lines).

The protein encoded by this gene is a subunit of the multisubunit NADH:ubiquinone oxidoreductase (complex I). Mammalian complex I is composed of 45 different subunits. This protein has NADH dehydrogenase activity and oxidoreductase activity. It plays a important role in transfering electrons from NADH to the respiratory chain. The immediate electron acceptor for the enzyme is believed to be ubiquinone. Hydropathy analysis revealed that this subunit and 4 other subunits have an overall hydrophilic pattern, even though they are found within the hydrophobic protein (HP) fraction of complex I.

Source: NCBI Gene 4708 — RefSeq curated summary.

At a glance

  • Clinical variants (ClinVar): 18 total
  • Druggable target: yes
  • Cancer dependency (DepMap): dependent in 19.0% of screened cell lines
  • MANE Select transcript: NM_004546

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:7697
Approved symbolNDUFB2
NameNADH:ubiquinone oxidoreductase subunit B2
Location7q34
Locus typegene with protein product
StatusApproved
AliasesAGGG, CI-AGGG
Ensembl geneENSG00000090266
Ensembl biotypeprotein_coding
OMIM603838
Entrez4708

Gene structure

Transcript identifiers

Ensembl transcripts: 29 — 25 protein_coding, 2 protein_coding_CDS_not_defined, 1 nonsense_mediated_decay, 1 retained_intron

ENST00000247866, ENST00000460088, ENST00000461457, ENST00000462847, ENST00000464564, ENST00000464566, ENST00000465506, ENST00000471136, ENST00000472695, ENST00000475276, ENST00000476181, ENST00000476279, ENST00000476470, ENST00000479181, ENST00000482954, ENST00000882733, ENST00000882734, ENST00000882735, ENST00000931392, ENST00000931393, ENST00000931394, ENST00000931395, ENST00000931396, ENST00000931397, ENST00000931398, ENST00000931399, ENST00000931400, ENST00000948626, ENST00000948627

RefSeq mRNA: 1 — MANE Select: NM_004546 NM_004546

CCDS: CCDS5862

Canonical transcript exons

ENST00000247866 — 4 exons

ExonStartEnd
ENSE00001838830140706563140706643
ENSE00001920266140696708140696842
ENSE00003632160140704860140704963
ENSE00003668515140702866140703010

Expression profiles

Bgee: expression breadth ubiquitous, 288 present calls, max score 99.72.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 55.8522 / max 425.0696, expressed in 1821 samples.

FANTOM5 promoters (3 alternative TSS)

Promoter IDTPM avgSamples expressed
8150953.27751821
815101.84941129
815110.7254464

Top tissues by expression

288 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
apex of heartUBERON:000209899.72gold quality
heart right ventricleUBERON:000208099.48gold quality
right lobe of thyroid glandUBERON:000111999.42gold quality
nephron tubuleUBERON:000123199.40gold quality
right atrium auricular regionUBERON:000663199.39gold quality
prefrontal cortexUBERON:000045199.37gold quality
left lobe of thyroid glandUBERON:000112099.36gold quality
renal glomerulusUBERON:000007499.33gold quality
metanephric glomerulusUBERON:000473699.33gold quality
endothelial cellCL:000011599.31gold quality
mucosa of transverse colonUBERON:000499199.30gold quality
nucleus accumbensUBERON:000188299.28gold quality
thyroid glandUBERON:000204699.27gold quality
diaphragmUBERON:000110399.26gold quality
caudate nucleusUBERON:000187399.23gold quality
putamenUBERON:000187499.23gold quality
skeletal muscle tissue of rectus abdominisUBERON:000451199.23gold quality
Brodmann (1909) area 9UBERON:001354099.23gold quality
renal medullaUBERON:000036299.22gold quality
cardiac ventricleUBERON:000208299.21gold quality
C1 segment of cervical spinal cordUBERON:000646999.21gold quality
metanephros cortexUBERON:001053399.21gold quality
heart left ventricleUBERON:000208499.20gold quality
body of tongueUBERON:001187699.19gold quality
cortex of kidneyUBERON:000122599.18gold quality
parotid glandUBERON:000183199.18gold quality
right frontal lobeUBERON:000281099.18gold quality
cervix squamous epitheliumUBERON:000692299.17gold quality
biceps brachiiUBERON:000150799.16gold quality
cingulate cortexUBERON:000302799.16gold quality

Single-cell (SCXA)

Detected in 7 experiment(s), a significant marker in 6.

ExperimentMarker?Max mean expression
E-ENAD-20yes1122.89
E-MTAB-7316yes24.28
E-HCAD-10yes12.03
E-MTAB-10042yes11.80
E-CURD-112yes9.71
E-MTAB-10596no885.49
E-ANND-3no0.00

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

20 targeting NDUFB2, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-477599.9875.006394
HSA-MIR-19A-3P99.9875.332762
HSA-MIR-19B-3P99.9875.442754
HSA-MIR-493-5P99.9672.472382
HSA-LET-7A-2-3P99.8770.531921
HSA-LET-7G-3P99.8570.431929
HSA-MIR-6758-3P99.5767.551078
HSA-MIR-4797-5P99.3968.011354
HSA-MIR-431699.3765.751360
HSA-MIR-149-5P99.2567.161315
HSA-MIR-485-5P99.1064.781889
HSA-MIR-6884-5P99.1064.501987
HSA-MIR-500A-5P98.7669.131241
HSA-MIR-6784-3P98.3964.88662
HSA-MIR-6862-3P97.9264.86531
HSA-MIR-6765-3P97.8364.591165
HSA-MIR-6511A-3P97.6066.61713
HSA-MIR-6511B-3P97.6066.61713
HSA-MIR-362-5P95.8766.02554
HSA-MIR-500B-5P95.8766.04557

Functional genomics

DepMap (CRISPR cell-line fitness): dependent in 19.0% of screened cell lines.

Literature-anchored findings (GeneRIF, showing 2)

  • NADH:ubiquinone oxidoreductase gene may have a role in the regulation of molecular changes during the global cardiac ischemia/reperfusion injury during CPB (PMID:14718445)
  • Association of abnormal NDUFB2 and UQCRH expression with venous thromboembolism in patients with liver cirrhosis. (PMID:38181234)

Cross-species orthologs

5 orthologs

OrganismSymbolGene ID
danio_reriondufb2ENSDARG00000045490
mus_musculusNdufb2ENSMUSG00000002416
rattus_norvegicusNdufb2ENSRNOG00000026616
rattus_norvegicusNdufb2ENSRNOG00000084454
caenorhabditis_elegansWBGENE00009712

Protein

Protein identifiers

NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 2, mitochondrialO95178 (reviewed: O95178)

Alternative names: Complex I-AGGG, NADH-ubiquinone oxidoreductase AGGG subunit

All UniProt accessions (8): O95178, A4D1T5, C9IZW8, C9IZZ2, C9JRV4, C9JXM4, F8WCJ6, H7C5B8

UniProt curated annotations — full annotation on UniProt →

Function. Accessory subunit of the mitochondrial membrane respiratory chain NADH dehydrogenase (Complex I), that is believed not to be involved in catalysis. Complex I functions in the transfer of electrons from NADH to the respiratory chain. The immediate electron acceptor for the enzyme is believed to be ubiquinone.

Subunit / interactions. Complex I is composed of 45 different subunits.

Subcellular location. Mitochondrion inner membrane.

Similarity. Belongs to the complex I NDUFB2 subunit family.

RefSeq proteins (1): NP_004537* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR026627NDUFB2_animalFamily

Pfam: PF14813

UniProt features (4 total): transit peptide 1, chain 1, region of interest 1, compositionally biased region 1

Structure

Experimental structures (PDB)

7 structures.

PDBMethodResolution (Å)
9I4IELECTRON MICROSCOPY2.63
9TI4ELECTRON MICROSCOPY2.66
9CWTELECTRON MICROSCOPY3.44
5XTCELECTRON MICROSCOPY3.7
5XTDELECTRON MICROSCOPY3.7
5XTHELECTRON MICROSCOPY3.9
5XTIELECTRON MICROSCOPY17.4

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-O95178-F173.560.20

Function

Pathways and Gene Ontology

Reactome pathways

4 pathways

IDPathway
R-HSA-611105Respiratory electron transport
R-HSA-6799198Complex I biogenesis
R-HSA-1428517Aerobic respiration and respiratory electron transport
R-HSA-1430728Metabolism

MSigDB gene sets: 211 (showing top): ATF_B, MODY_HIPPOCAMPUS_POSTNATAL, STARK_PREFRONTAL_CORTEX_22Q11_DELETION_DN, GRAESSMANN_APOPTOSIS_BY_SERUM_DEPRIVATION_UP, GOBP_ORGANOPHOSPHATE_METABOLIC_PROCESS, GOBP_NUCLEOSIDE_PHOSPHATE_BIOSYNTHETIC_PROCESS, GOBP_ORGANOPHOSPHATE_BIOSYNTHETIC_PROCESS, GOBP_CARBOHYDRATE_DERIVATIVE_METABOLIC_PROCESS, GOBP_MONOATOMIC_CATION_TRANSPORT, GOBP_NUCLEOBASE_CONTAINING_SMALL_MOLECULE_METABOLIC_PROCESS, GOBP_GENERATION_OF_PRECURSOR_METABOLITES_AND_ENERGY, GOBP_ATP_BIOSYNTHETIC_PROCESS, GOBP_OXIDATIVE_PHOSPHORYLATION, GOBP_CARBOHYDRATE_DERIVATIVE_BIOSYNTHETIC_PROCESS, GOBP_NUCLEOSIDE_TRIPHOSPHATE_METABOLIC_PROCESS

GO Biological Process (4): mitochondrial electron transport, NADH to ubiquinone (GO:0006120), aerobic respiration (GO:0009060), proton motive force-driven mitochondrial ATP synthesis (GO:0042776), proton transmembrane transport (GO:1902600)

GO Molecular Function (1): NADH dehydrogenase (ubiquinone) activity (GO:0008137)

GO Cellular Component (4): mitochondrion (GO:0005739), mitochondrial inner membrane (GO:0005743), respiratory chain complex I (GO:0045271), membrane (GO:0016020)

Reactome top-level categories

Rollup of top-3 pathways:

CategoryPathways
Aerobic respiration and respiratory electron transport1
Respiratory electron transport1
Metabolism1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
aerobic electron transport chain1
mitochondrial ATP synthesis coupled electron transport1
cellular respiration1
mitochondrion1
oxidative phosphorylation1
proton motive force-driven ATP synthesis1
monoatomic cation transmembrane transport1
NADH dehydrogenase activity1
electron transfer activity1
proton transmembrane transporter activity1
oxidoreduction-driven active transmembrane transporter activity1
oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor1
active monoatomic ion transmembrane transporter activity1
cytoplasm1
intracellular membrane-bounded organelle1
organelle inner membrane1
mitochondrial membrane1
NADH dehydrogenase complex1
respiratory chain complex1
transmembrane transporter complex1
cellular anatomical structure1

Protein interactions and networks

STRING

822 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
NDUFB2NDUFB4O95168973
NDUFB2NDUFA10O95299918
NDUFB2NDUFB10O96000917
NDUFB2MRPS33Q9Y291875
NDUFB2NDUFA7O95182856
NDUFB2NDUFB3O43676846
NDUFB2NDUFB7P17568829
NDUFB2NDUFA2O43678817
NDUFB2NDUFB9Q9Y6M9813
NDUFB2NDUFAB1O14561807
NDUFB2NDUFB8O95169778
NDUFB2NDUFC1O43677721
NDUFB2NDUFB5O43674685
NDUFB2COXFA4O00483672
NDUFB2NDUFS5O43920669

IntAct

6 interactions, top by confidence:

ABTypeScore
NDUFB2PFKMpsi-mi:“MI:0915”(physical association)0.370
NDUFA6NDUFS8psi-mi:“MI:0914”(association)0.350
NDUFA7NDUFS8psi-mi:“MI:0914”(association)0.350
NDUFV3NDUFS8psi-mi:“MI:0914”(association)0.350
NDUFA1NDUFS8psi-mi:“MI:0914”(association)0.350

BioGRID (30): NDUFB2 (Negative Genetic), NDUFB2 (Positive Genetic), NDUFB2 (Positive Genetic), NDUFB2 (Negative Genetic), NDUFB2 (Negative Genetic), NDUFB2 (Negative Genetic), NDUFB2 (Negative Genetic), NDUFB2 (Positive Genetic), NDUFB2 (Negative Genetic), NDUFB2 (Positive Genetic), NDUFB2 (Positive Genetic), NDUFB2 (Positive Genetic), NUP54 (Negative Genetic), PGK1 (Negative Genetic), PSMC6 (Negative Genetic)

ESM2 similar proteins: A3KP48, A8WGU8, O09111, O43674, O95169, O95178, P0C2B7, P0C2B9, P0CB69, P0CB70, P0CB85, P0CB86, P82649, P82927, P83565, Q02372, Q02380, Q0MQC7, Q0MQC9, Q0MQD6, Q0MQD7, Q0MQD8, Q0MQE6, Q0MQE7, Q0MQF5, Q0MQJ3, Q0MQJ4, Q0MQJ5, Q29259, Q2NKR7, Q4G0I0, Q4QQV3, Q4R4E0, Q5R4S3, Q5R504, Q5RFR4, Q6DQX6, Q6RUT7, Q8HXG5, Q96A26

Diamond homologs: O95178, Q02374, Q0MQC7, Q0MQC8, Q0MQC9, Q20412, Q9CPU2, Q61Z75

SIGNOR signaling

1 interactions.

AEffectBMechanism
NDUFB2“form complex”“NADH-ubiquinone oxidoreductase-Mitochondrial respiratory chain complex I”binding

Disease & clinical

Clinical variants and AI predictions

ClinVar

18 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance10
Likely benign0
Benign0

Top pathogenic / likely-pathogenic (0)

SpliceAI

1204 predictions. Top by Δscore:

VariantEffectΔscore
7:140692026:GCACT:Gdonor_gain1.0000
7:140696835:GTCC:Gdonor_gain1.0000
7:140696839:GTCA:Gdonor_gain1.0000
7:140696843:G:GGdonor_gain1.0000
7:140702864:AGT:Aacceptor_gain1.0000
7:140702865:GT:Gacceptor_gain1.0000
7:140702865:GTG:Gacceptor_gain1.0000
7:140702865:GTGCC:Gacceptor_gain1.0000
7:140703007:GCTG:Gdonor_gain1.0000
7:140703008:CTGGT:Cdonor_loss1.0000
7:140703010:GGT:Gdonor_loss1.0000
7:140703011:G:GGdonor_gain1.0000
7:140703011:GTAA:Gdonor_loss1.0000
7:140704964:G:GGdonor_gain1.0000
7:140690810:CAAG:Cdonor_loss0.9900
7:140690811:AAGGT:Adonor_loss0.9900
7:140690812:AGG:Adonor_loss0.9900
7:140690813:GGTGA:Gdonor_loss0.9900
7:140690815:T:Adonor_loss0.9900
7:140692030:T:Gdonor_gain0.9900
7:140694655:T:TAacceptor_gain0.9900
7:140694659:CCAG:Cacceptor_loss0.9900
7:140694660:CAG:Cacceptor_loss0.9900
7:140694661:A:AGacceptor_gain0.9900
7:140694661:AGGT:Aacceptor_loss0.9900
7:140694662:G:GGacceptor_gain0.9900
7:140694662:GGT:Gacceptor_gain0.9900
7:140694662:GGTAA:Gacceptor_gain0.9900
7:140696840:TCA:Tdonor_gain0.9900
7:140697445:A:Tdonor_gain0.9900

AlphaMissense

680 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
7:140704892:G:CW92C0.985
7:140704892:G:TW92C0.985
7:140704890:T:AW92R0.983
7:140704890:T:CW92R0.983
7:140702963:T:AW66R0.981
7:140702963:T:CW66R0.981
7:140704912:T:CI99T0.977
7:140704866:T:CF84L0.968
7:140704868:T:AF84L0.968
7:140704868:T:GF84L0.968
7:140702966:T:CF67L0.966
7:140702968:C:AF67L0.966
7:140702968:C:GF67L0.966
7:140702902:A:CR45S0.964
7:140702902:A:TR45S0.964
7:140704906:T:CL97S0.964
7:140702969:T:AW68R0.963
7:140702969:T:CW68R0.963
7:140704908:G:CG98R0.961
7:140704912:T:GI99S0.960
7:140704909:G:TG98V0.958
7:140704891:G:CW92S0.957
7:140702973:T:CI69T0.956
7:140702901:G:TR45I0.955
7:140704860:G:CG82R0.950
7:140702951:A:CS62R0.949
7:140702953:C:AS62R0.949
7:140702953:C:GS62R0.949
7:140702901:G:CR45T0.947
7:140702954:G:AG63R0.944

dbSNP variants (sampled 300 via entrez): RS1000223200 (7:140703929 A>G,T), RS1000324933 (7:140703527 A>G), RS1000636390 (7:140696975 G>A), RS1001017675 (7:140698862 A>T), RS1001153270 (7:140699086 A>G), RS1001279069 (7:140702163 T>A,C), RS1001537819 (7:140698440 A>G), RS1001611709 (7:140698130 A>G), RS1001830538 (7:140703992 T>A,C), RS1001876509 (7:140699988 T>C), RS1002062477 (7:140703848 T>C), RS1002110162 (7:140705891 G>C,T), RS1002281672 (7:140703563 C>T), RS1002565658 (7:140705541 G>A,T), RS1002753072 (7:140695468 C>T)

Disease associations

OMIM: gene MIM:603838 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

0 associations (top):

Drugs & pharmacology

Drug and pharmacology data

Is drug target: yes

ChEMBL targets (1): CHEMBL2363065 (PROTEIN COMPLEX)

PharmGKB: 1 entry (VIP=true, CPIC=false)

ChEMBL bioactivities

8 potent at pChembl≥5 of 18 total, top 8 by pChembl (potency: 10 = 0.1 nM, 6 = 1 µM).

pChemblTypeValueUnitMolecule
6.06IC50870nMR-(+)-MARMIN-6’-UNDECANOATE
6.04IC50920nMR-(+)-MARMIN-6’-LINOLEATE
5.63IC502350nMR-(+)-MARMIN-6’-LINOLEATE
5.51IC503080nMR-(+)-MARMIN-6’-OCTANOATE
5.43IC503670nMR-(+)-MARMIN-6’-UNDECANOATE
5.43IC503710nMR-(+)-MARMIN-6’-OCTANOATE
5.31IC504900nM(+)-9’-ISOVALEROXYLARICIRESINOL
5.04IC509100nM(+)-9’-ISOVALEROXYLARICIRESINOL

PubChem BioAssay actives

8 with measured affinity, of 28 total; 4 most potent distinct compounds. Largely complementary to BindingDB; screening values are coarse (µM, 4 dp), so sub-nM hits tie at the floor.

CompoundAssayTypeValueUnit
[(E,3R)-2-hydroxy-2,6-dimethyl-8-(2-oxochromen-7-yl)oxyoct-6-en-3-yl] undecanoate739270: Inhibition of mitochondrial ETC complex 1 in human T47D cells assessed as inhibition of 1% O2-induced HIF1 activation incubated for 30 mins prior to 1% O2-challenge measured after 16 hrs by luciferase reporter assayic500.8700uM
[(E,3R)-2-hydroxy-2,6-dimethyl-8-(2-oxochromen-7-yl)oxyoct-6-en-3-yl] (9Z,12Z)-octadeca-9,12-dienoate739270: Inhibition of mitochondrial ETC complex 1 in human T47D cells assessed as inhibition of 1% O2-induced HIF1 activation incubated for 30 mins prior to 1% O2-challenge measured after 16 hrs by luciferase reporter assayic500.9200uM
[(E,3R)-2-hydroxy-2,6-dimethyl-8-(2-oxochromen-7-yl)oxyoct-6-en-3-yl] octanoate739270: Inhibition of mitochondrial ETC complex 1 in human T47D cells assessed as inhibition of 1% O2-induced HIF1 activation incubated for 30 mins prior to 1% O2-challenge measured after 16 hrs by luciferase reporter assayic503.0800uM
[(2S,3R,4R)-2-(4-hydroxy-3-methoxyphenyl)-4-[(4-hydroxy-3-methoxyphenyl)methyl]oxolan-3-yl]methyl 3-methylbutanoate739269: Inhibition of mitochondrial ETC complex 1 in human T47D cells assessed as inhibition of 1,10-phenanthroline-induced HIF1 activation incubated for 30 mins prior to 1,10-phenanthroline-challenge measured after 16 hrs by luciferase reporter assayic504.9000uM

CTD chemical–gene interactions

51 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
Valproic Acidaffects expression, decreases expression, increases methylation, affects cotreatment, increases expression3
bisphenol Adecreases expression, affects expression2
sodium arseniteaffects cotreatment, increases abundance, increases expression2
Cisplatinincreases expression2
bisphenol Faffects cotreatment, increases expression1
dicrotophosdecreases expression1
beta-lapachonedecreases expression, increases expression1
arseniteaffects binding, increases reaction1
methylparabendecreases expression1
tris(1,3-dichloro-2-propyl)phosphatedecreases expression1
cobaltous chloridedecreases expression1
tanshinoneincreases expression1
manganese chlorideaffects cotreatment, increases abundance, increases expression1
ochratoxin Aincreases expression1
tris(chloroethyl)phosphatedecreases expression, increases abundance1
di-n-butylphosphoric acidaffects expression1
CGP 52608increases reaction, affects binding1
chloropicrinincreases expression1
bisphenol Saffects cotreatment, increases expression1
Fulvestrantincreases methylation1
Acetaminophenincreases expression1
Air Pollutantsdecreases expression, increases abundance1
Arsenicincreases expression, affects cotreatment, increases abundance1
Atrazinedecreases expression1
Cadmiumincreases expression, increases abundance1
Dexamethasoneaffects cotreatment, increases expression1
Doxorubicindecreases expression1
Estradioldecreases expression1
Flame Retardantsdecreases expression, increases abundance1
Fluorouracilincreases expression1

ChEMBL screening assays

4 unique, capped per target: 4 binding

Representative assays (with source publication via chembl_document):

Assay IDTypeDescriptionSource paper
CHEMBL2353025BindingInhibition of mitochondrial ETC complex 1 in human T47D cells assessed as inhibition of 1% O2-induced HIF1 activation at 30 uM incubated for 30 mins prior to 1% O2-challenge measured after 16 hrs by luciferase reporter assaySemisynthetic studies identify mitochondria poisons from botanical dietary supplements–geranyloxycoumarins from Aegle marmelos. — Bioorg Med Chem

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.