background:
Posttranslational modification of proteins by the addition of the small protein SUMO (see SUMO1; MIM 601912), or sumoylation, regulates protein structure and intracellular localization. SAE1 (MIM 613294) and UBA2 form a heterodimer that functions as a SUMO-activating enzyme for the sumoylation of proteins (Okuma et al., 1999 [PubMed 9920803]).[supplied by OMIM, Mar 2010]
Function:
The heterodimer acts as a E1 ligase for SUMO1, SUMO2, SUMO3, and probably SUMO4. It mediates ATP-dependent activation of SUMO proteins followed by formation of a thioester bond between a SUMO protein and a conserved active site cysteine residue on UBA2/SAE2.
Subcellular Location:
Nucleus.
Similarity:
Belongs to the ubiquitin-activating E1 family.
Database links:
Entrez Gene: 10054 Human
Entrez Gene: 50995 Mouse
Entrez Gene: 308508 Rat
Entrez Gene: 406672 Zebrafish
Omim: 613295 Human
SwissProt: Q9UBT2 Human
SwissProt: Q9Z1F9 Mouse
SwissProt: Q7SXG4 Zebrafish
Unigene: 63316 Human
Unigene: 27560 Mouse
Unigene: 198150 Rat
Unigene: 78013 Zebrafish
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
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