Small Ubiquitin-Related Modifier Proteins

**Definition:** A class of structurally related proteins of 12-20 kDa in size. They covalently modify specific proteins in a manner analogous to UBIQUITIN.

**Tree numbers:** - D12.776.947.249

**Synonyms:** - Sentrin Proteins - SUMO Proteins - Sentrins - Ubiquitin-Related Modifier Protein, Small