Free for academic non-profit institutions. Other users need a Commercial license

Aliases for COQ3 Gene

Aliases for COQ3 Gene

  • Coenzyme Q3 Methyltransferase 2 3
  • Polyprenyldihydroxybenzoate Methyltransferase 2 3 4
  • Hexaprenyldihydroxybenzoate Methyltransferase, Mitochondrial 3
  • Coenzyme Q3 Homolog, Methyltransferase (S. Cerevisiae) 2
  • 3,4-Dihydroxy-5-Hexaprenylbenzoate Methyltransferase 3
  • Coenzyme Q3 Homolog, Methyltransferase (Yeast) 2
  • Dihydroxyhexaprenylbenzoate Methyltransferase 3
  • 3-Demethylubiquinone-10 3-Methyltransferase 3
  • 3-Demethylubiquinol 3-O-Methyltransferase 4
  • 2-Polyprenyl-6-Hydroxyphenol Methylase 3
  • 2-Polyprenyl-6-Hydroxyphenyl Methylase 3
  • Coenzyme Q3 Homolog, Methyltransferase 3
  • DHHB Methyltransferase 3
  • Methyltransferase COQ3 3
  • EC 4
  • EC 4
  • DHHB-MTase 3
  • UG0215E05 3
  • BA9819.1 3
  • EC 2.1.1 63
  • DHHB-MT 3
  • DHHBMT 3

External Ids for COQ3 Gene

Previous GeneCards Identifiers for COQ3 Gene

  • GC06M099685
  • GC06M099833
  • GC06M099862
  • GC06M099923
  • GC06M099817
  • GC06M097257

Summaries for COQ3 Gene

Entrez Gene Summary for COQ3 Gene

  • Ubiquinone, also known as coenzyme Q, or Q, is a critical component of the electron transport pathways of both eukaryotes and prokaryotes (Jonassen and Clarke, 2000 [PubMed 10777520]). This lipid consists of a hydrophobic isoprenoid tail and a quinone head group. The tail varies in length depending on the organism, but its purpose is to anchor coenzyme Q to the membrane. The quinone head group is responsible for the activity of coenzyme Q in the respiratory chain. The S. cerevisiae COQ3 gene encodes an O-methyltransferase required for 2 steps in the biosynthetic pathway of coenzyme Q. This enzyme methylates an early coenzyme Q intermediate, 3,4-dihydroxy-5-polyprenylbenzoic acid, as well as the final intermediate in the pathway, converting demethyl-ubiquinone to coenzyme Q. The COQ3 gene product is also capable of methylating the distinct prokaryotic early intermediate 2-hydroxy-6-polyprenyl phenol.[supplied by OMIM, Mar 2008]

GeneCards Summary for COQ3 Gene

COQ3 (Coenzyme Q3 Methyltransferase) is a Protein Coding gene. Among its related pathways are Metabolism and Metabolism. GO annotations related to this gene include O-methyltransferase activity and 2-polyprenyl-6-methoxy-1,4-benzoquinone methyltransferase activity.

UniProtKB/Swiss-Prot for COQ3 Gene

  • O-methyltransferase that catalyzes the 2 O-methylation steps in the ubiquinone biosynthetic pathway.

No data available for Tocris Summary , Gene Wiki entry , PharmGKB "VIP" Summary , fRNAdb sequence ontologies and piRNA Summary for COQ3 Gene

Genomics for COQ3 Gene

Regulatory Elements for COQ3 Gene

Epigenetics Products

  • DNA Methylation CpG Assay Predesigned for Pyrosequencing in human,mouse,rat

Genomic Location for COQ3 Gene

99,369,400 bp from pter
99,394,206 bp from pter
24,807 bases
Minus strand

Genomic View for COQ3 Gene

UCSC Golden Path with GeneCards custom track
Cytogenetic band:
Genomic Location for COQ3 Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for COQ3 Gene

Proteins for COQ3 Gene

  • Protein details for COQ3 Gene (UniProtKB/Swiss-Prot)

    Protein Symbol:
    Recommended name:
    Ubiquinone biosynthesis O-methyltransferase, mitochondrial
    Protein Accession:
    Secondary Accessions:
    • B3KPX0
    • Q5T061
    • Q6P4F0
    • Q8IXG6
    • Q96BG1
    • Q9H0N1

    Protein attributes for COQ3 Gene

    369 amino acids
    Molecular mass:
    41054 Da
    Quaternary structure:
    • Component of a multi-subunit COQ enzyme complex, composed of at least COQ3, COQ4, COQ5, COQ6, COQ7 and COQ9.
    • Sequence=AAF66826.1; Type=Frameshift; Positions=16, 18, 22, 26, 44, 49, 60, 363, 364; Evidence={ECO:0000305};

neXtProt entry for COQ3 Gene

Proteomics data for COQ3 Gene at MOPED

Selected DME Specific Peptides for COQ3 Gene

Post-translational modifications for COQ3 Gene

  • Modification sites at PhosphoSitePlus
  • Modification sites at neXtProt

Other Protein References for COQ3 Gene

ENSEMBL proteins:
Reactome Protein details:
REFSEQ proteins:

Antibody Products

Domains for COQ3 Gene

Protein Domains for COQ3 Gene

Suggested Antigen Peptide Sequences for COQ3 Gene

GenScript: Design optimal peptide antigens:

Graphical View of Domain Structure for InterPro Entry



  • Belongs to the class I-like SAM-binding methyltransferase superfamily. UbiG/COQ3 family.
  • Belongs to the class I-like SAM-binding methyltransferase superfamily. UbiG/COQ3 family.
genes like me logo Genes that share domains with COQ3: view

No data available for Gene Families for COQ3 Gene

Function for COQ3 Gene

Molecular function for COQ3 Gene

UniProtKB/Swiss-Prot CatalyticActivity:
S-adenosyl-L-methionine + 3,4-dihydroxy-5-all-trans-polyprenylbenzoate = S-adenosyl-L-homocysteine + 3-methoxy-4-hydroxy-5-all-trans-polyprenylbenzoate.
UniProtKB/Swiss-Prot CatalyticActivity:
S-adenosyl-L-methionine + 3-demethylubiquinone-n = S-adenosyl-L-homocysteine + ubiquinone-n.
UniProtKB/Swiss-Prot Function:
O-methyltransferase that catalyzes the 2 O-methylation steps in the ubiquinone biosynthetic pathway.

Enzyme Numbers (IUBMB) for COQ3 Gene

Gene Ontology (GO) - Molecular Function for COQ3 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0004395 hexaprenyldihydroxybenzoate methyltransferase activity IEA --
GO:0008168 methyltransferase activity --
GO:0008171 O-methyltransferase activity IGI 10777520
GO:0008276 protein methyltransferase activity --
GO:0008425 2-polyprenyl-6-methoxy-1,4-benzoquinone methyltransferase activity IEA --
genes like me logo Genes that share ontologies with COQ3: view

Phenotypes for COQ3 Gene

genes like me logo Genes that share phenotypes with COQ3: view

Animal Model Products

miRNA for COQ3 Gene

miRTarBase miRNAs that target COQ3

miRNA Products

Inhibitory RNA Products

  • Predesigned siRNA for gene silencing in human,mouse,rat for COQ3

In Situ Assay Products

Flow Cytometry Products

No data available for Animal Models , Transcription Factor Targeting and HOMER Transcription for COQ3 Gene

Localization for COQ3 Gene

Subcellular locations from UniProtKB/Swiss-Prot for COQ3 Gene

Mitochondrion inner membrane; Peripheral membrane protein; Matrix side.

Subcellular locations from

Jensen Localization Image for COQ3 Gene COMPARTMENTS Subcellular localization image for COQ3 gene
Compartment Confidence
mitochondrion 4
nucleus 2
peroxisome 2
cytosol 1

Gene Ontology (GO) - Cellular Components for COQ3 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005737 cytoplasm --
GO:0005739 mitochondrion IDA 10777520
GO:0005759 mitochondrial matrix TAS --
genes like me logo Genes that share ontologies with COQ3: view

Pathways for COQ3 Gene

genes like me logo Genes that share pathways with COQ3: view

Pathways by source for COQ3 Gene

UniProtKB/Swiss-Prot Q9NZJ6-COQ3_HUMAN

  • Pathway: Cofactor biosynthesis; ubiquinone biosynthesis.

Gene Ontology (GO) - Biological Process for COQ3 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0006071 glycerol metabolic process IGI 10777520
GO:0006479 protein methylation --
GO:0006744 ubiquinone biosynthetic process TAS --
GO:0008152 metabolic process --
GO:0008610 lipid biosynthetic process --
genes like me logo Genes that share ontologies with COQ3: view

Compounds for COQ3 Gene

(8) HMDB Compounds for COQ3 Gene

Compound Synonyms Cas Number PubMed IDs
  • Demethyl-ubiquinol-6
Not Available
Not Available
3-Hexaprenyl-4,5-Dihydroxybenzoic acid
  • 3,4-Dihydroxy-5-hexaprenylbenzoate
3-Hexaprenyl-4-hydroxy-5-methoxybenzoic acid
  • 3-Mhhb
  • (S)-5'-(S)-(3-Amino-3-carboxypropyl)-5'-thioadenosine
genes like me logo Genes that share compounds with COQ3: view

Transcripts for COQ3 Gene

Unigene Clusters for COQ3 Gene

Coenzyme Q3 homolog, methyltransferase (S. cerevisiae):
Representative Sequences:

miRNA Products

Inhibitory RNA Products

  • Predesigned siRNA for gene silencing in human,mouse,rat for COQ3

Flow Cytometry Products

Alternative Splicing Database (ASD) splice patterns (SP) for COQ3 Gene

ExUns: 1a · 1b · 1c · 1d ^ 2 ^ 3 ^ 4a · 4b ^ 5 ^ 6a · 6b ^ 7 ^ 8a · 8b
SP1: -
SP3: - -
SP4: - -
SP5: - - - - - - -

Relevant External Links for COQ3 Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for COQ3 Gene

mRNA expression in normal human tissues for COQ3 Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

mRNA differential expression in normal tissues according to GTEx for COQ3 Gene

This gene is overexpressed in Heart - Left Ventricle (4.2).

Protein differential expression in normal tissues for COQ3 Gene

This gene is overexpressed in Heart (22.2), Breast (11.5), and Tonsil (7.6).

Integrated Proteomics: protein expression from ProteomicsDB, PaxDb, MOPED, and MaxQB for COQ3 Gene

SOURCE GeneReport for Unigene cluster for COQ3 Gene Hs.713623

genes like me logo Genes that share expressions with COQ3: view

Expression partners for COQ3 Gene

* - Elite partner

Primer Products

In Situ Assay Products

No data available for mRNA Expression by UniProt/SwissProt for COQ3 Gene

Orthologs for COQ3 Gene

This gene was present in the common ancestor of eukaryotes.

Orthologs for COQ3 Gene

Organism Taxonomy Gene Similarity Type Details
(Bos Taurus)
Mammalia COQ3 35
  • 85.73 (n)
  • 81.03 (a)
COQ3 36
  • 81 (a)
(Canis familiaris)
Mammalia COQ3 35
  • 86.21 (n)
  • 81.1 (a)
COQ3 36
  • 83 (a)
(Mus musculus)
Mammalia Coq3 35
  • 78.56 (n)
  • 73.02 (a)
Coq3 16
Coq3 36
  • 72 (a)
(Pan troglodytes)
Mammalia COQ3 35
  • 99.46 (n)
  • 98.37 (a)
COQ3 36
  • 98 (a)
(Rattus norvegicus)
Mammalia Coq3 35
  • 83.57 (n)
  • 81.34 (a)
(Monodelphis domestica)
Mammalia COQ3 36
  • 66 (a)
(Ornithorhynchus anatinus)
Mammalia COQ3 36
  • 52 (a)
(Gallus gallus)
Aves COQ3 35
  • 70.14 (n)
  • 66.19 (a)
COQ3 36
  • 61 (a)
(Anolis carolinensis)
Reptilia COQ3 36
  • 64 (a)
tropical clawed frog
(Silurana tropicalis)
Amphibia coq3 35
  • 65.54 (n)
  • 61.42 (a)
African clawed frog
(Xenopus laevis)
Amphibia Xl.22548 35
(Danio rerio)
Actinopterygii coq3 35
  • 61.15 (n)
  • 61.02 (a)
coq3 36
  • 50 (a)
rainbow trout
(Oncorhynchus mykiss)
Actinopterygii Omy.4935 35
fruit fly
(Drosophila melanogaster)
Insecta CG9249 37
  • 40 (a)
CG9249 35
  • 49.47 (n)
  • 42.06 (a)
CG9249 36
  • 35 (a)
African malaria mosquito
(Anopheles gambiae)
Insecta AgaP_AGAP010537 35
  • 49.87 (n)
  • 46.4 (a)
(Caenorhabditis elegans)
Secernentea coq-3 35
  • 47.68 (n)
  • 43.03 (a)
coq-3 36
  • 39 (a)
A. gosspyii yeast
(Ashbya gossypii)
Saccharomycetes AGOS_ADR115W 35
  • 44.12 (n)
  • 36.93 (a)
K. lactis yeast
(Kluyveromyces lactis)
Saccharomycetes KLLA0C03630g 35
  • 46.05 (n)
  • 36.44 (a)
baker's yeast
(Saccharomyces cerevisiae)
Saccharomycetes COQ3 35
  • 45.49 (n)
  • 34.76 (a)
COQ3 36
  • 26 (a)
COQ3 38
thale cress
(Arabidopsis thaliana)
eudicotyledons COQ3 35
  • 51.42 (n)
  • 41.3 (a)
(Oryza sativa)
Liliopsida Os06g0152300 35
  • 53.14 (n)
  • 46.03 (a)
bread mold
(Neurospora crassa)
Ascomycetes NCU05982 35
  • 44.07 (n)
  • 36.54 (a)
fission yeast
(Schizosaccharomyces pombe)
Schizosaccharomycetes coq3 35
  • 47.42 (n)
  • 38.49 (a)
sea squirt
(Ciona savignyi)
Ascidiacea -- 36
  • 38 (a)
Species with no ortholog for COQ3:
  • Actinobacteria (Mycobacterium tuberculosis)
  • Alicante grape (Vitis vinifera)
  • alpha proteobacteria (Wolbachia pipientis)
  • amoeba (Dictyostelium discoideum)
  • Archea (Pyrococcus horikoshii)
  • barley (Hordeum vulgare)
  • beta proteobacteria (Neisseria meningitidis)
  • Chromalveolata (Phytophthora infestans)
  • common water flea (Daphnia pulex)
  • corn (Zea mays)
  • E. coli (Escherichia coli)
  • filamentous fungi (Aspergillus nidulans)
  • Firmicute bacteria (Streptococcus pneumoniae)
  • green algae (Chlamydomonas reinhardtii)
  • honey bee (Apis mellifera)
  • loblloly pine (Pinus taeda)
  • malaria parasite (Plasmodium falciparum)
  • medicago trunc (Medicago Truncatula)
  • moss (Physcomitrella patens)
  • orangutan (Pongo pygmaeus)
  • pig (Sus scrofa)
  • rice blast fungus (Magnaporthe grisea)
  • schistosome parasite (Schistosoma mansoni)
  • sea anemone (Nematostella vectensis)
  • sea urchin (Strongylocentrotus purpuratus)
  • sorghum (Sorghum bicolor)
  • soybean (Glycine max)
  • stem rust fungus (Puccinia graminis)
  • sugarcane (Saccharum officinarum)
  • tomato (Lycopersicon esculentum)
  • toxoplasmosis (Toxoplasma gondii)
  • Trichoplax (Trichoplax adhaerens)
  • wheat (Triticum aestivum)

Evolution for COQ3 Gene

Gene Tree for COQ3 (if available)
Gene Tree for COQ3 (if available)

Paralogs for COQ3 Gene

No data available for Paralogs for COQ3 Gene

Variants for COQ3 Gene

Sequence variations from dbSNP and Humsavar for COQ3 Gene

SNP ID Clin Chr 06 pos Sequence Context AA Info Type MAF
rs1132363 -- 99,369,471(-) TTGGA(A/C)AAAAG downstream-variant-500B, utr-variant-3-prime
rs4144164 - 99,369,725(+) AGCAT(A/G)AGCTG missense, reference
rs4382271 -- 99,375,114(+) ACAGG(C/T)ATGCG intron-variant
rs4501438 -- 99,380,855(+) tgagt(A/C)gagat intron-variant
rs4574651 -- 99,371,680(+) TCTTC(C/T)AAATA intron-variant

Structural Variations from Database of Genomic Variants (DGV) for COQ3 Gene

Variant ID Type Subtype PubMed ID
nsv886436 CNV Gain 21882294
nsv886438 CNV Gain 21882294
nsv527517 CNV Loss 19592680
nsv886439 CNV Loss 21882294

Relevant External Links for COQ3 Gene

HapMap Linkage Disequilibrium report

No data available for Polymorphic Variants from UniProtKB/Swiss-Prot for COQ3 Gene

Disorders for COQ3 Gene

Relevant External Links for COQ3

Genetic Association Database (GAD)
Human Genome Epidemiology (HuGE) Navigator

No disorders were found for COQ3 Gene.

No data available for MalaCards , OMIM , UniProtKB/Swiss-Prot , University of Copenhagen DISEASES , Novoseek inferred disease relationships and Genatlas for COQ3 Gene

Publications for COQ3 Gene

  1. Isolation and functional expression of human COQ3, a gene encoding a methyltransferase required for ubiquinone biosynthesis. (PMID: 10777520) Jonassen T. … Clarke C.F. (J. Biol. Chem. 2000) 2 3 4 23
  2. Towards a catalog of human genes and proteins: sequencing and analysis of 500 novel complete protein coding human cDNAs. (PMID: 11230166) Wiemann S. … Poustka A. (Genome Res. 2001) 3 4
  3. Complete sequencing and characterization of 21,243 full-length human cDNAs. (PMID: 14702039) Ota T. … Sugano S. (Nat. Genet. 2004) 3 4
  4. The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). (PMID: 15489334) Gerhard D.S. … Malek J. (Genome Res. 2004) 3 4
  5. An association study of 45 folate-related genes in spina bifida: Involvement of cubilin (CUBN) and tRNA aspartic acid methyltransferase 1 (TRDMT1). (PMID: 19161160) Franke B. … Blom H.J. (Birth Defects Res. Part A Clin. Mol. Teratol. 2009) 3 48

Products for COQ3 Gene

Sources for COQ3 Gene

Back to Top