# MYBL1

Source: https://onco.cc/targets/mybl1/  
OnCo record `mybl1` (Target). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

MYBL1 (Myb-related protein A) is a protein that switches other genes on and off. The public catalogues list it as a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response.

## Summary

Transcription factor that specifically recognises the sequence 5'-YAAC[GT]G-3'. Acts as a master regulator of male meiosis by promoting expression of piRNAs: activates expression of both piRNA precursor RNAs and expression of protein-coding genes involved in piRNA metabolism. The piRNA metabolic process mediates the repression of transposable elements during meiosis by forming complexes composed of piRNAs and Piwi proteins and governs the methylation and subsequent repression of transposons, which is essential for the germline integrity.

CIViC holds 3 clinical evidence items and 1 assertion across 1 variant.

## Fields

- Kind: Target
- Last checked: 2026-09-23
- Also known as: MYB proto-oncogene like 1; Myb-related protein A; A-myb
- Tags: cancer-genes-wave
- Symbol: MYBL1
- Class: transcription
- Biology: Transcription factor that specifically recognises the sequence 5'-YAAC[GT]G-3'. Acts as a master regulator of male meiosis by promoting expression of piRNAs: activates expression of both piRNA precursor RNAs and expression of protein-coding genes involved in piRNA metabolism. The piRNA metabolic process mediates the repression of transposable elements during meiosis by forming complexes composed of piRNAs and Piwi proteins and governs the methylation and subsequent repression of transposons, which is essential for the germline integrity. Transcriptional activator of SOX30. Location: Nucleus (UniProt). Locus 8q13.1 (HGNC).

## Notes

- Written by scripts/fetch-cancer-genes.ts from CIViC, Open Targets, IntOGen, HGNC and UniProt; the function text is UniProt's, condensed and in UK spelling. Roles: CIViC holds 3 clinical evidence items on its variants. Evidence tier "clinical-evidence" is the strongest of those signals.
- Prevalence not recorded: none of the sources gives a positivity rate.
- Diseases the sources name that have no OnCo cancer page yet, so they are not linked: Diffuse Astrocytoma, MYB- Or MYBL1-altered.

## Sources

- HGNC HGNC:7547: https://www.genenames.org/data/gene-symbol-report/#!/hgnc_id/HGNC:7547
- UniProt P10243: https://www.uniprot.org/uniprotkb/P10243/entry
- NCBI Gene 4603: https://www.ncbi.nlm.nih.gov/gene/4603
- Ensembl ENSG00000185697: https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000185697

## Connected records

- collections: [CIViC](https://onco.cc/collections/civic/)

---
JSON: https://onco.cc/api/v1/entities/mybl1.json