CYP19A1
Endocrine System · Steroidogenesis & Nuclear Hormone Signaling
What does CYP19A1 do with testosterone and estrogen?
CYP19A1 encodes aromatase, the enzyme that converts androgens into estrogens. This conversion supports hormone balance in several tissues and cannot be measured simply by reading the gene name on a report.
- Common Gene Name
- cytochrome P450 family 19 subfamily A member 1
- NCBI Gene ID
- 1588
- Chromosome
- 15
Clinical Evidence Status
Clinical utility not established here
These labels describe available evidence about a gene. They do not classify your variant or recommend a treatment.
Answer Sources
Explore supporting evidence (3 records)
| Condition or drug | Evidence | Grade / status | Context | Source |
|---|---|---|---|---|
| Breast cancer | MedlinePlus related condition | Association type varies; no grade assigned here | View source 2014-04 | |
| Aromatase deficiency | MedlinePlus related condition | Association type varies; no grade assigned here | View source 2014-04 | |
| Aromatase excess syndrome | MedlinePlus related condition | Association type varies; no grade assigned here | View source 2014-04 |
Source snapshot: 2026-09-09. Consumer text updated: 2026-09-10. Source dates describe the cited records, not a new clinical review.
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