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Transmembrane Domain Oligomerization Propensity determined by ToxR Assay
Published on: May 26, 2011
Structure, interactions, and dynamics of the RING domain from human TRAF6
Pascal Mercier1, Michael J Lewis, D Duong Hau
1Department of Biochemistry, University of Alberta, Edmonton, Alberta T6G 2H7, Canada.
Protein Science : a Publication of the Protein Society
|March 1, 2007
Summary
The hUev1a-hUbc13 enzyme complex catalyzes Lys63-linked polyubiquitination of TRAF6, a crucial step in NF-kappaB signaling. Researchers used NMR to study the TRAF6 RING domain structure and its interaction with hUbc13.
Area of Science:
- Biochemistry
- Molecular Biology
- Structural Biology
Background:
- NF-kappaB signaling activation involves Lys63-linked polyubiquitination of TRAF6.
- The hUev1a-hUbc13 heterodimer catalyzes ubiquitin attachment and polyubiquitin chain synthesis on TRAF6.
- hUbc13 is a catalytically active E2 enzyme, while hUev1a binds ubiquitin.
Purpose of the Study:
- To determine the solution state structure of the human TRAF6 RING domain.
- To characterize the interaction between hUbc13 and TRAF6 using NMR.
- To investigate the main-chain dynamics of the TRAF6 RING domain.
Main Methods:
- Nuclear Magnetic Resonance (NMR) spectroscopy was employed.
- NMR chemical shift mapping was used to characterize protein interactions.
- (15)N NMR relaxation studies were performed to analyze dynamics.
Main Results:
- The solution state structure of the TRAF6 RING domain was determined.
- The interaction interface between hUbc13 and TRAF6 was mapped.
- Analysis revealed rigidity in the alpha-helix and beta-sheet of the TRAF6 RING domain.
Conclusions:
- The TRAF6 RING domain structure and dynamics are consistent with its role in recruiting E2 ubiquitin conjugation enzymes.
- Understanding these interactions provides insight into NF-kappaB pathway regulation.
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