Download MendeleyCrystal Structure of Desi-1, a Novel Desumoylase Belonging to a Putative Isopeptidase Superfamily.
Suh, H.Y., Kim, J.H., Woo, J.S., Ku, B., Shin, E.J., Yun, Y., Oh, B.H.(2012) Proteins 80: 2099
- PubMed: 22498933
- DOI: https://doi.org/10.1002/prot.24093
- Primary Citation of Related Structures:
2WP7 - PubMed Abstract:
Post-translational modification by small ubiquitin-like modifier (SUMO) can be reversed by sentrin/SUMO-specific proteases (SENPs), the first known class of deSUMOylase. Recently, we identified a new deSUMOylating enzyme DeSI-1, which is distinct from SENPs and belongs to the putative deubiquitinating isopeptidase PPPDE superfamily. Herein, we report the crystal structure of DeSI-1, revealing that this enzyme forms a homodimer and that the groove between the two subunits is the active site harboring two absolutely conserved cysteine and histidine residues that form a catalytic dyad. We also show that DeSI-1 exhibits an extremely low endopeptidase activity toward precursor forms of SUMO-1 and SUMO-2, unlike SENPs.
Organizational Affiliation:
Department of Biological Sciences, KAIST Institute for the Biocentury, Korea Advanced Institute of Science and Technology, Daejeon, Korea.
