Question

A protein can get sumoylated and it can also interact with other sumoylated proteins

Answer 1

Small ubiquitin-related modifier (SUMO) is an ubiquitin-like protein that is covalently attached to a variety of target proteins. Unlike ubiquitination, sumoylation does not target proteins for proteolytic breakdown, but is instead involved in regulating a variety of different protein functional properties including protein-protein interactions and subcellular targeting,