Determinants of small ubiquitin-like modifier 1 (SUMO1) protein specificity, E3 ligase, and SUMO-RanGAP1 binding activities of nucleoporin RanBP2.
Gareau, J.R., Reverter, D., Lima, C.D.(2012) J Biol Chem 287: 4740-4751
- PubMed: 22194619 
- DOI: 10.1074/jbc.M111.321141
- Primary Citation of Related Structures:  
3UIN, 3UIO, 3UIP - PubMed Abstract: 
The RanBP2 nucleoporin contains an internal repeat domain (IR1-M-IR2) that catalyzes E3 ligase activity and forms a stable complex with SUMO-modified RanGAP1 and UBC9 at the nuclear pore complex. RanBP2 exhibits specificity for SUMO1 as RanGAP1-SUMO1/UBC9 forms a more stable complex with RanBP2 compared with RanGAP1-SUMO2 that results in greater protection of RanGAP-SUMO1 from proteases ...