# SPOP

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

## TL;DR

SPOP (Speckle-type POZ protein) is a gene that drives cell growth when it is altered. 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 Prostate cancer, Endometrial cancer, Non-Hodgkin lymphoma and 4 more.

## Summary

Component of a cullin-RING-based BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex that mediates the ubiquitination of target proteins, leading most often to their proteasomal degradation. In complex with CUL3, involved in ubiquitination and proteasomal degradation of BRMS1, DAXX, PDX1/IPF1, GLI2 and GLI3. In complex with CUL3, involved in ubiquitination of MACROH2A1 and BMI1; this does not lead to their proteasomal degradation.

CIViC holds 9 clinical evidence items and 0 assertions across 10 variants. Open Targets scores its association with cancer at 0.77 (direct and indirect evidence; datatypes literature 1.00, genetic association 0.00, somatic mutation 0.92). IntOGen calls it a driver in 15 cohorts (14 activating, 1 loss-of-function), covering Non-Hodgkin Lymphoma, Prostate Adenocarcinoma, Prostate, Endometrial Carcinoma, Uterine Carcinosarcoma/Uterine Malignant Mixed Mullerian Tumour.

## Fields

- Kind: Target
- Last checked: 2026-09-23
- Also known as: speckle type BTB/POZ protein; Speckle-type POZ protein; TEF2; BTBD32
- Tags: cancer-genes-wave
- Symbol: SPOP
- Class: oncogene
- Biology: Component of a cullin-RING-based BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex that mediates the ubiquitination of target proteins, leading most often to their proteasomal degradation. In complex with CUL3, involved in ubiquitination and proteasomal degradation of BRMS1, DAXX, PDX1/IPF1, GLI2 and GLI3. In complex with CUL3, involved in ubiquitination of MACROH2A1 and BMI1; this does not lead to their proteasomal degradation. Inhibits transcriptional activation of PDX1/IPF1 targets, such as insulin, by promoting PDX1/IPF1 degradation. The cullin-RING-based BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex containing homodimeric SPOP has higher ubiquitin ligase activity than the complex that contains the heterodimer formed by SPOP and SPOPL. Involved in the regulation of bromodomain and extra-terminal motif (BET) proteins BRD2, BRD3, BRD4 stability. Location: Nucleus; Nucleus speckle; Cytoplasm (UniProt). Locus 17q21.33 (HGNC).
- Where found: Prostate cancer: Open Targets association 0.72 with prostate cancer (MONDO_0008315); IntOGen driver in 12 cohorts (PRAD, PROSTATE); Endometrial cancer: Open Targets association 0.62 with endometrial cancer (MONDO_0011962); IntOGen driver in 1 cohort (UCEC); Non-Hodgkin lymphoma: IntOGen driver in 1 cohort (NHL); Ovarian cancer: Open Targets association 0.52 with ovarian cancer (MONDO_0008170); Skin cancer: Open Targets association 0.52 with skin cancer (MONDO_0002898); Uterine carcinosarcoma: IntOGen driver in 1 cohort (UCS)

## 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 14 cohorts; IntOGen calls it a loss-of-function (LoF) driver in 1 cohort; CIViC holds 9 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.

## Sources

- HGNC HGNC:11254: https://www.genenames.org/data/gene-symbol-report/#!/hgnc_id/HGNC:11254
- UniProt O43791: https://www.uniprot.org/uniprotkb/O43791/entry
- NCBI Gene 8405: https://www.ncbi.nlm.nih.gov/gene/8405
- Ensembl ENSG00000121067: https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000121067

## 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: [Endometrial cancer](https://onco.cc/cancers/endometrial/), [Melanoma](https://onco.cc/cancers/melanoma/), [Non-Hodgkin lymphoma (all types)](https://onco.cc/cancers/non-hodgkin-lymphoma/), [Ovarian cancer](https://onco.cc/cancers/ovarian/), [Prostate cancer](https://onco.cc/cancers/prostate/), [Skin cancer (all types)](https://onco.cc/cancers/skin-cancer/), [Uterine carcinosarcoma](https://onco.cc/cancers/uterine-carcinosarcoma/)

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