# BCOR

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

## TL;DR

BCOR (BCL-6 corepressor) is a protein that switches other genes on and off. The public catalogues list it as an oncogene driver, a tumour suppressor and a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Leukaemia, Non-Hodgkin lymphoma, Endometrial cancer and 5 more.

## Summary

Transcriptional corepressor. May specifically inhibit gene expression when recruited to promoter regions by sequence-specific DNA-binding proteins such as BCL6 and MLLT3. This repression may be mediated at least in part by histone deacetylase activities which can associate with this corepressor.

CIViC holds 13 clinical evidence items and 4 assertions across 2 variants. Open Targets scores its association with cancer at 0.80 (direct and indirect evidence; datatypes literature 0.95, affected pathway 0.61, genetic association 0.52, somatic mutation 0.91). IntOGen calls it a driver in 23 cohorts (5 activating, 18 loss-of-function), covering Adrenocortical Carcinoma, Acute Myeloid Leukaemia, Cholangiocarcinoma, Chronic Lymphocytic Leukaemia/Small Lymphocytic Lymphoma, Colorectal Adenocarcinoma, Glioblastoma Multiforme and others.

## Fields

- Kind: Target
- Last checked: 2026-09-23
- Also known as: BCL6 corepressor; BCL-6 corepressor; FLJ20285; KIAA1575
- Tags: cancer-genes-wave
- Symbol: BCOR
- Class: transcription
- Biology: Transcriptional corepressor. May specifically inhibit gene expression when recruited to promoter regions by sequence-specific DNA-binding proteins such as BCL6 and MLLT3. This repression may be mediated at least in part by histone deacetylase activities which can associate with this corepressor. Involved in the repression of TFAP2A; impairs binding of BCL6 and KDM2B to TFAP2A promoter regions. Via repression of TFAP2A acts as a negative regulator of osteo-dentiogenic capacity in adult stem cells; the function implies inhibition of methylation on histone H3 'Lys-4' (H3K4me3) and 'Lys-36' (H3K36me2). Location: Nucleus (UniProt). Locus Xp11.4 (HGNC).
- Where found: Leukaemia: Open Targets association 0.69 with leukaemia (MONDO_0005059); Non-Hodgkin lymphoma: Open Targets association 0.63 with non-Hodgkin lymphoma (MONDO_0018908); Endometrial cancer: Open Targets association 0.62 with endometrial cancer (MONDO_0011962); IntOGen driver in 3 cohorts (UCEC); Gastric & gastro-oesophageal junction cancer: Open Targets association 0.51 with gastric cancer (MONDO_0001056); CIViC evidence names this disease; Sarcomas: CIViC evidence names this disease; Myelodysplastic syndromes / neoplasms: CIViC evidence names this disease

## 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: IntOGen calls it an activating (Act) driver in 5 cohorts; IntOGen calls it a loss-of-function (LoF) driver in 18 cohorts; CIViC holds 13 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: Kidney Clear Cell Sarcoma; Central Nervous System Tumour With BCOR Internal Tandem Duplication; Low-Grade Glioma, NOS.

## Sources

- HGNC HGNC:20893: https://www.genenames.org/data/gene-symbol-report/#!/hgnc_id/HGNC:20893
- UniProt Q6W2J9: https://www.uniprot.org/uniprotkb/Q6W2J9/entry
- NCBI Gene 54880: https://www.ncbi.nlm.nih.gov/gene/54880
- Ensembl ENSG00000183337: https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000183337

## Connected records

- collections: [CIViC](https://onco.cc/collections/civic/), [IntOGen](https://onco.cc/collections/intogen/), [Open Targets Platform](https://onco.cc/collections/open-targets/)
- cancers: [Adrenocortical carcinoma](https://onco.cc/cancers/adrenocortical/), [Colorectal cancer](https://onco.cc/cancers/colorectal/), [Endometrial cancer](https://onco.cc/cancers/endometrial/), [Gastric & gastro-oesophageal junction cancer](https://onco.cc/cancers/gastric/), [Leukaemia (all types)](https://onco.cc/cancers/leukaemia/), [Myelodysplastic syndromes / neoplasms (MDS)](https://onco.cc/cancers/mds/), [Non-Hodgkin lymphoma (all types)](https://onco.cc/cancers/non-hodgkin-lymphoma/), [Sarcomas (soft tissue, bone, GIST)](https://onco.cc/cancers/sarcoma/)

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JSON: https://onco.cc/api/v1/entities/bcor.json