text: 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.
option_0: SUMO protein
option_1: Ankyrin repeat
option_2: Ribosomal RNA
option_3: TORCH complex
option_4: Cardiolipin
option_5: Motor protein
option_6: SNARE 
option_7: Acrinathrin