COQ7

coenzyme Q7, hydroxylase

Gene Function

Catalyzes the hydroxylation of the 5-methoxy-2-methyl-3-(all-trans-polyprenyl)benzoquinone at the C6 position and participates in the biosynthesis of ubiquinone (Probable). Catalyzes the reaction through a substrate-mediated reduction pathway, whereby NADH shuttles electrons to 5-methoxy-2-methyl-3-(all-trans-decaprenyl)benzoquinone, which then transfers the electrons to the two Fe(3+) centers. The binding of 5-methoxy-2-methyl-3-(all-trans-polyprenyl)benzoquinone (DMQn) mediates reduction of the diiron center by nicotinamide adenine dinucleotide (NADH) and initiates oxygen activation for subsequent DMQ hydroxylation. The physiological substrates are 5-methoxy-2-methyl-3-(all-trans-nonaprenyl)benzoquinone (DMQ(9)) and 5-methoxy-2-methyl-3-(all-trans-decaprenyl)benzoquinone (DMQ(10)), however in vitro the enzyme does not have any specificity concerning the length of the polyprenyl tail, and accepts tails of various lengths with similar efficiency. Also has a structural role in the COQ enzyme complex, stabilizing other COQ polypeptides. Involved in lifespan determination in a ubiquinone-independent manner (By similarity). Plays a role in modulating mitochondrial stress responses, acting in the nucleus, perhaps via regulating gene expression, independent of its characterized mitochondrial function in ubiquinone biosynthesis Source: UniProt

Relationship to CMT

dHMN/HMN AR
1 subtype
16p12.3
First described 2023
Mitochondrial involvement

Subtype Inheritance Class OMIM Sentinel Publication
SubtypedHMN-COQ7 Inheritanceautosomal recessive ClassdHMN/HMN OMIM620402 Sentinel Publication

2023 · 10.1093/brain/awad158

Stored Identifiers

HGNC Aliases: CLK1
hgnc_idHGNC:2244
ensembl_gene_idENSG00000167186
coords_grch38chr16:19067564-19082190
coords_grch37chr16:19078921-19091417
entrez_id10229
omim_gene601683
uniprot_idsQ99807
refseq_accessionNM_016138
mane_refseqNM_016138.5
mane_ensemblENST00000321998.10

ClinVar Variants

Pathogenic and likely pathogenic variants in COQ7, as classified in ClinVar, are read live from NCBI. Only aggregate germline records are shown. Uncertain and conflicting classifications are not. Experts in CMT makes no claim to the accuracy of ClinVar data. This index is provided for informational purposes only.

Review stars are ClinVar’s measure of how well a classification is supported: four for a practice guideline, three for an expert panel review, two for agreement among multiple submitters, one for a single submitter with criteria provided, and none where no criteria were provided.

Reported in CMT
Reported in Other Diseases

Reported in a disease other than CMT. Listed apart rather than counted as CMT variants.

Variants w/o a Recorded Disease

Pathogenic or likely pathogenic in ClinVar, submitted without a disease recorded.

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