Biochemical Activity (Deubiquitination)

An interaction is inferred from the biochemical effect of one protein upon another, for example, GTP-GDP exchange activity or phosphorylation of a substrate by a kinase. The bait protein executes the activity on the substrate hit protein. A Modification value is recorded for interactions of this type with the possible values Phosphorylation, Ubiquitination, Sumoylation, Dephosphorylation, Methylation, Prenylation, Acetylation, Deubiquitination, Proteolytic Processing, Glucosylation, Nedd(Rub1)ylation, Deacetylation, No Modification, Demethylation.

Publication

USP22, an hSAGA subunit and potential cancer stem cell marker, reverses the polycomb-catalyzed ubiquitylation of histone H2A.

Zhang XY, Pfeiffer HK, Thorne AW, McMahon SB

Initial studies of the mammalian hSAGA transcriptional coactivator complex identified the acetyltransferase hGCN5/PCAF as the only known enzymatic subunit. Recently we demonstrated that the ubiquitin hydrolase USP22 comprises a second enzymatic subunit of hSAGA, and that is required for activator-driven transcription. USP22 is expressed with polycomb ubiquitin ligases in an 11 gene signature that defines therapy-resistant tumors. At the biochemical ... [more]

Cell Cycle Jun. 01, 2008; 7(11);1522-4 [Pubmed: 18469533]

Throughput

  • Low Throughput

Additional Notes

  • in vitro deubiquitination with purified GCN5, and possibly other co-purifying proteins, as deubiquitinase and either histone H2A or histone H2B as substrate

Curated By

  • BioGRID