4O1V: Spop Promotes Tumorigenesis By Acting As A Key Regulatory Hub In Kidney Cancer

Hypoxic stress and hypoxia-inducible factors (HIFs) play important roles in a wide range of tumors. We demonstrate that SPOP, which encodes an E3 ubiquitin ligase component, is a direct transcriptional target of HIFs in clear cell renal cell carcinoma (ccRCC). Furthermore, hypoxia results in cytoplasmic accumulation of SPOP, which is sufficient to induce tumorigenesis. This tumorigenic activity occurs through the ubiquitination and degradation of multiple regulators of cellular proliferation and apoptosis, including the tumor suppressor PTEN, ERK phosphatases, the proapoptotic molecule Daxx, and the Hedgehog pathway transcription factor Gli2. Knockdown of SPOP specifically kills ccRCC cells, indicating that it may be a promising therapeutic target. Collectively, our results indicate that SPOP serves as a regulatory hub to promote ccRCC tumorigenesis.
PDB ID: 4O1VDownload
MMDB ID: 119767
PDB Deposition Date: 2013/12/16
Updated in MMDB: 2014/05
Experimental Method:
x-ray diffraction
Resolution: 2  Å
Source Organism:
Similar Structures:
Biological Unit for 4O1V: dimeric; determined by author and by software (PISA)
Molecular Components in 4O1V
Label Count Molecule
Proteins (2 molecules)
Speckle-type POZ Protein(Gene symbol: SPOP)
Molecule annotation
Phosphatidylinositol 3,4,5-trisphosphate 3-phosphatase and Dual-specificity Protein Phosphatase Pten(Gene symbol: PTEN)
Molecule annotation
* Click molecule labels to explore molecular sequence information.

Citing MMDB