Abstract
NEDD8 is a ubiquitin (Ub)-like protein. Here we report a novel ubiquitinylation-related pathway for modification by NEDD8. NEDD8 was activated by an E1 (Ub-activating enzyme)-like complex, consisting of APP-BP1 and hUba3 with high respective homologies to the amino- and carboxy-terminal regions of E1 and then linked to hUbc12 (a human homolog of yeast Ub-conjugating enzyme Ubc12p). The major target protein modified by NEDD8 was found to be Hs-cullin-4A (Cul-4A), a member of the family of human cullin/Cdc53 proteins functioning as an essential component of a multifunctional Ub-protein ligase E3 complex that has a critical role in Ub-mediated proteolysis.
MeSH Terms
Amino Acid Sequence
Animals
Cell Cycle Proteins/genetics,metabolism
Cullin Proteins
DNA-Binding Proteins/genetics,metabolism
Humans
In Vitro Techniques
Ligases/genetics,metabolism
Molecular Sequence Data
NEDD8 Protein
Rabbits
Saccharomyces cerevisiae Proteins
Sequence Homology, Amino Acid
Ubiquitin-Activating Enzymes
Ubiquitin-Protein Ligases
Ubiquitins/genetics,metabolism
Chemicals
Cell Cycle Proteins
Cullin 1
Cullin Proteins
DNA-Binding Proteins
NEDD8 Protein
NEDD8 protein, human
Saccharomyces cerevisiae Proteins
UBC12 protein, S cerevisiae
Ubiquitins
Ubiquitin-Protein Ligases
Ligases
Ubiquitin-Activating Enzymes
NAE protein, human
Authors & Affiliations
8 authors, click to expand affiliations / ORCID
Osaka F
Kato Cytoprotein Network Project, ERATO, Japan Science and Technology Corporation (JST), Sagami Chemical Research Center, Sagamihara, Kanagawa 229-0012, Japan.
Kawasaki H
Aida N
Saeki M
Chiba T
Kawashima S
Tanaka K
Kato S
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