PIAS-1 is a checkpoint regulator which affects exit from G1 and G2 by sumoylation of p73
Molecular and Cellular Biology (2004) - Comments
pubmed: 15572666  doi: 10.1128/mcb.24.24.10593-10610.2004  issn: 0270-7306 

Eliana Munarriz, Daniela Barcaroli, Anastasis Stephanou, Paul A Townsend, Carine Maisse, Alessandro Terrinoni, Michael H Neale, Seamus J Martin, David S Latchman, Richard A Knight, Gerry Melino, Vincenzo De Laurenzi