Protein
NEDD8-activating enzyme E1 catalytic subunit
Organism
Arabidopsis thaliana
Function
Catalytic subunit of the dimeric ECR1-AXR1 E1 enzyme. E1 activates NEDD8/RUB1 by first adenylating its C-terminal glycine residue with ATP, thereafter linking this residue to the side chain of the catalytic cysteine, yielding a NEDD8-ECR1 thioester and free AMP. E1 finally transfers NEDD8 to the catalytic cysteine of RCE1 (By similarity).
Similarity
Belongs to the ubiquitin-activating E1 family. UBA3 subfamily.
Sequence
MADLDVPPQVPQSKTRDLDKLLLRHGNLVDPGFVPGPGLRDDIRDYVRILVIGAGGLGCELLKDLALSGFRNLEVIDMDRIEVTNLNRQFLFRIEDVGKPKAEVAAKRVMERVSGVEIVPHFSRIEDKEIEFYNDFNIIALGLDSIEARKYINGVACGFLEYNEDDTPKRETIKPMVDGGTEGFKGHARVILPGVTPCFECTIYLFPPQVKFPLCTLAETPRNAAHCIEYAHLIQWETVHRGKTFDPDEPEHMKWVYDEAIRRAELFGIPGVTYSLTQGVVKNIIPAIASTNAIISAACALETLKIVSACSKTLVNYLTYNGGEGLYTEVTKFERDTECLVCGPGILIELDTSVTLSKFIEMLEDHPKLLLSKASVKQGENTLYMQAPPVLEEFHRPKLSKPLYDLMGRVQKDTIHVFGQRALKNNEKESCTTKVRVVFKGADGVADMDTAIGA