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Ubiquitin-like protein that can be covalently attached to proteins as a monomer or as a lysine-linked polymer. Covalent attachment via an isopeptide bond to its substrates requires prior activation by the E1 complex SAE1-SAE2 and linkage to the E2 enzyme UBE2I, and can be promoted by an E3 ligase such as PIAS1-4, RANBP2 or CBX4. This post-translational modification on lysine residues of proteins plays a crucial role in a number of cellular processes such as nuclear transport, DNA replication and repair, mitosis and signal transduction. Polymeric SUMO2 chains are also susceptible to polyubiquitination which functions as a signal for proteasomal degradation of modified proteins.
Gene Name: | small ubiquitin-like modifier 2 |
Synonyms: | SUMO2, HSMT3, SMT3 homolog 2, SMT3A, Sentrin 2, Smt3B, SMT3H2, SUMO-2, SUMO-3, Sentrin-2, Ubiquitin-like protein SMT3A, Ubiquitin-like protein SMT3B |
Target Sequences: | NM_006937 NP_008868.3 P61956 |
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