Small Ubiquitin-related Modifier or<unk> s are a family of small<unk> s that are covalently attached to and detached from other<unk> s in cells to modify their function.<unk> ylation is a post-translational modification involved in various cellular processes, such as nuclear-cytosolic transport, transcriptional regulation, apoptosis,<unk>  stability, response to stress, and progression through the cell cycle.<unk> s are similar to ubiquitin, and<unk> ylation is directed by an enzymatic cascade analogous to that involved in ubiquitination. In contrast to ubiquitin,<unk>  is not used to tag<unk> s for degradation. Mature<unk>  is produced when the last four amino acids of the C-terminus have been cleaved off.<unk>  family members often have dissimilar names; the<unk> 1 homologue in yeast, for example, is called SMT3 (suppressor of mif two 3). Several pseudogenes have been reported for this gene.
SUMO protein
Ankyrin repeat
Ribosomal RNA
TORCH complex
Cardiolipin
Motor protein
SNARE 
Acrinathrin