Display Settings:

Format

Send to:

Choose Destination
J Biol Chem. 2012 Dec 7;287(50):42071-83. doi: 10.1074/jbc.M112.410985. Epub 2012 Oct 18.

Poly-small ubiquitin-like modifier (PolySUMO)-binding proteins identified through a string search.

Author information

  • 1Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies, La Jolla, California 92037, USA. hsun@salk.edu

Abstract

Polysumoylation is a crucial cellular response to stresses against genomic integrity or proteostasis. Like the small ubiquitin-like modifier (SUMO)-targeted ubiquitin ligase RNF4, proteins with clustered SUMO-interacting motifs (SIMs) can be important signal transducers downstream of polysumoylation. To identify novel polySUMO-binding proteins, we conducted a computational string search with a custom Python script. We found clustered SIMs in another RING domain protein Arkadia/RNF111. Detailed biochemical analysis of the Arkadia SIMs revealed that dominant SIMs in a SIM cluster often contain a pentameric VIDLT ((V/I/L/F/Y)(V/I)DLT) core sequence that is also found in the SIMs in PIAS family E3s and is likely the best-fitted structure for SUMO recognition. This idea led to the identification of additional novel SIM clusters in FLASH/CASP8AP2, C5orf25, and SOBP/JXC1. We suggest that the clustered SIMs in these proteins form distinct SUMO binding domains to recognize diverse forms of protein sumoylation.

PMID:
23086935
[PubMed - indexed for MEDLINE]
PMCID:
PMC3516753
Free PMC Article

Images from this publication.See all images (5)Free text

FIGURE 1.
FIGURE 2.
FIGURE 3.
FIGURE 4.
FIGURE 5.
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Write to the Help Desk