Amino-terminal Dimerization, NRDP1-Rhodanese Interaction, and Inhibited Catalytic Domain Conformation of the Ubiquitin-specific Protease 8 (USP8).Avvakumov, G.V., Walker, J.R., Xue, S., Finerty Jr., P.J., Mackenzie, F., Newman, E.M., Dhe-Paganon, S.
(2006) J Biol Chem 281: 38061-38070
- PubMed: 17035239
- DOI: 10.1074/jbc.M606704200
- Primary Citation of Related Structures:
2GWF, 2FZP, 2GFO, 2A9U
- PubMed Abstract:
- Stabilization of the E3 ubiquitin ligase Nrdp1 by the deubiquitinating enzyme USP8.
Wu, X., Yen, L., Irwin, L., Sweeney, C., Carraway, K.L.
(2004) Mol Cell Biol 24: 7748
- Nrdp1-mediated degradation of the gigantic IAP, BRUCE, is a novel pathway for triggering apoptosis.
Qiu, X.B., Markant, S.L., Yuan, J., Goldberg, A.L.
(2004) EMBO J 23: 800
- An RBCC protein implicated in maintenance of steady-state neuregulin receptor levels.
Diamonti, A.J., Guy, P.M., Ivanof, C., Wong, K., Sweeney, C., Carraway, K.L.
(2002) Proc Natl Acad Sci U S A 99: 2866
- FLRF, a novel evolutionarily conserved RING finger gene, is differentially expressed in mouse fetal and adult hematopoietic stem cells and progenitors.
Abdullah, J.M., Li, X., Nachtman, R.G., Jurecic, R.
(2001) Blood Cells Mol Dis 27: 320
Ubiquitin-specific protease 8 (USP8) hydrolyzes mono and polyubiquitylated targets such as epidermal growth factor receptors and is involved in clathrin-mediated internalization. In 1182 residues, USP8 contains multiple domains, including coiled-coil, rhodanese, and catalytic domains ...
Ubiquitin-specific protease 8 (USP8) hydrolyzes mono and polyubiquitylated targets such as epidermal growth factor receptors and is involved in clathrin-mediated internalization. In 1182 residues, USP8 contains multiple domains, including coiled-coil, rhodanese, and catalytic domains. We report the first high-resolution crystal structures of these domains and discuss their implications for USP8 function. The amino-terminal domain is a homodimer with a novel fold. It is composed of two five-helix bundles, where the first helices are swapped, and carboxyl-terminal helices are extended in an antiparallel fashion. The structure of the rhodanese domain, determined in complex with the E3 ligase NRDP1, reveals the canonical rhodanese fold but with a distorted primordial active site. The USP8 recognition domain of NRDP1 has a novel protein fold that interacts with a conserved peptide loop of the rhodanese domain. A consensus sequence of this loop is found in other NRDP1 targets, suggesting a common mode of interaction. The structure of the carboxyl-terminal catalytic domain of USP8 exhibits the conserved tripartite architecture but shows unique traits. Notably, the active site, including the ubiquitin binding pocket, is in a closed conformation, incompatible with substrate binding. The presence of a zinc ribbon subdomain near the ubiquitin binding site further suggests a polyubiquitin-specific binding site and a mechanism for substrate induced conformational changes.
Structural Genomics Consortium and the Department of Physiology, University of Toronto, Toronto, Ontario M5G 1L5, Canada.