TRIM37 recognizes a bipartite degron to ubiquitinate centrosome substrates.

ABSTRACT: Dysregulation of the E3 ubiquitin ligase TRIM37 is associated with tumor formation and Mulibrey nanism, a recessive developmental syndrome. TRIM37 regulates steady-state levels of centrosome proteins and limits their ectopic assembly, but how it recognizes and ubiquitinates its substrates is poorly understood. We found that TRIM37 directly ubiquitinates the centrosome-forming protein Cep192 at 7 lysines clustered near its C-terminus. TRIM37 binds Cep192 at a C-terminal intrinsically disordered region followed by an ASH domain (IDR+ASH8). Mutation of the 7 lysines or the IDR+ASH8 domain increased Cep192 levels and stability in cells, indicating loss of TRIM37-based regulation. Fusing IDR+ASH8 to an unrelated protein (GFP-EB1) was sufficient to enable its degradation via TRIM37. Biochemical

SUBMITTER: Stachera WE 

PROVIDER: S-EPMC12724674 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature