Multiple Arkadia/RNF111 structures coordinate its Polycomb body association and transcriptional control

ABSTRACT: The RING domain protein Arkadia/RNF111 is a ubiquitin ligase in the transforming growth factor beta (TGFβ) pathway. We previously identified Arkadia as a small ubiquitin-like modifier (SUMO)-binding protein with clustered SUMO-interacting motifs (SIMs) that together form a SUMO-binding domain (SBD). However, precisely how SUMO interaction contributes to the function of Arkadia was not resolved. Through analytical molecular and cell biology, we found that the SIMs share redundant function with Arkadia's M domain, a region distinguishing Arkadia from its paralogs ARKL1/ARKL2 and the prototypical SUMO-targeted ubiquitin ligase (STUbL) RNF4. The SIMs and M domain together promote both Arkadia's colocalization with CBX4/Pc2, a component of Polycomb bodies, and the activation of a TGFbeta pathwa

ORGANISM(S): Mus musculus

SUBMITTER: Huaiyu Sun 

PROVIDER: E-GEOD-65796 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress