Gene
CYP4V2
cytochrome P450 family 4 subfamily V member 2
- HGNC 23198↗(opens in a new tab)
- Ensembl gene ENSG00000145476↗(opens in a new tab)
- NCBI Gene 285440↗(opens in a new tab)
Summary
- Cytogenetic location
- 4q35.1-q35.2
- Coordinates
- Chromosome 4: 186,191,567–186,213,463 (GRCh38)
- Exons
- 11 exons across 21.9 kb
- Protein
- 525 amino acids
- Inheritance
- Autosomal recessive
- Also known as
- CYP4AH1
- MANE Select transcript
- ENST00000378802.5NM_207352.4
- Locus type
- gene with protein product
- Very high
- Confident
- Low
- Very low
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Hereditary Macular Dystrophies
- Bietti Crystalline Corneoretinal DystrophyAutosomal recessive
A recessive retinal dystrophy caused by changes in both copies of CYP4V2, with glistening crystals in the retina and progressive vision loss.
- ClinGen rates the link definitive
- 5 GenCC submitters rate it definitive or strong
What knowing changes
A genetic diagnosis can give access to gene-therapy clinical trials.
Inheritance
- Autosomal recessive
- It takes a changed copy from each parent. With one, you are a carrier and usually unaffected; when both parents are carriers, each child has a one-in-four chance of inheriting two.
How CYP4V2 is laid out
- Coding sequence
- Untranslated region
- Intron
- Direction of transcription
- Known disease-causing sites
- Stretches short reads find hard
Exons of the gene's MANE Select transcript (release v1.5), from NCBI and EMBL-EBI, on the GRCh38 reference genome.
Chromosome bands from UCSC's GRCh38 ideogram (2022-10-29).
Nearby genes from Ensembl release 116, on GRCh38.
Exons make up 4.7 kb of the gene's 21.9 kb; 1,578 of those bases code for the protein.
How a genome test reads CYP4V2
34
positions in CYP4V2 where ClinVar classes a change as pathogenic or likely pathogenic
None of them falls in a region short reads find hard.
A whole genome covers all 21.9 kb of CYP4V2, introns included, not only the 4.7 kb of exons.
Traits linked to CYP4V2
The Human Phenotype Ontology lists these as features of the rare conditions CYP4V2 can cause. Each trait's page lists the other genes linked to it.
Abnormality of the eye
- Decreased clarity of vision
- Choriocapillaris atrophy
- Chorioretinal atrophy
- Corneal crystals
- Decreased light- and dark-adapted electroretinogram amplitude
- Difficulties with night vision
- Limited peripheral vision
- Retinal pigment epithelial atrophy
Show 17 more traits
- Subretinal deposits
- Visual impairment
- Abnormal color vision
- Blind spot located at fixation point
- Blindness
- Cystoid macular edema
- Large central loss of field of vision
- Marked vision impairment
- Paracentral scotoma
- Pigmentary retinopathy
- Retinal pigment epithelial mottling
- Retinal thinning
- Severe near sightedness
- Marginal corneal dystrophy
- Progressive loss of vision
- Progressive night blindness
- Retina degeneration
External links
Gene records
Transcript
Protein
Where this comes from
- HGNC: the gene's symbol, name, other symbols and location.
- MANE Select v1.5, from NCBI and EMBL-EBI: the transcript, its exons and coding sequence.
- GenCC and ClinGen, released 2026-10-16: which conditions the gene is linked to, and how strongly.
- The ACMG secondary findings list, SF v3.2.
- ClinVar and the GIAB stratifications: known disease-causing sites, and the regions short reads find hard.
- The Human Phenotype Ontology, release 2026-09-01: the traits linked to the gene. Find out more at hpo.jax.org.
- Data release 2026.10.16-c6eea6bf.
Cite this page
Dante Labs. (n.d.). CYP4V2 gene: cytochrome P450 family 4 subfamily V member 2. Retrieved 17 October 2026, from https://dantelabs.com/genes/cyp4v2
Dante Labs. CYP4V2 gene: cytochrome P450 family 4 subfamily V member 2 [Internet]. [cited 17 October 2026]. Available from: https://dantelabs.com/genes/cyp4v2
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