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NEDD8-activating enzyme E1 regulatory subunit

Definition:

Regulatory subunit of the dimeric UBA3-NAE1 E1 enzyme. E1 activates NEDD8 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-UBA3 thioester and free AMP. E1 finally transfers NEDD8 to the catalytic cysteine of UBE2M. Necessary for cell cycle progression through the S-M checkpoint. Overexpression of NAE1 causes apoptosis through deregulation of NEDD8 conjugation.

References:

[1]. L Gong, et al. Identification of the activating and conjugating enzymes of the NEDD8 conjugation pathway. J Biol Chem. 1999 Apr 23;274(17):12036-42. [Content Brief]

[2]. Richard N Bohnsack, et al. Conservation in the mechanism of Nedd8 activation by the human AppBp1-Uba3 heterodimer. J Biol Chem. 2003 Jul 18;278(29):26823-30. [Content Brief]

[3]. Y Chen, et al. The amyloid precursor protein-binding protein APP-BP1 drives the cell cycle through the S-M checkpoint and causes apoptosis in neurons. J Biol Chem. 2000 Mar 24;275(12):8929-35. [Content Brief]

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