1.15 Å resolution structure of the proteasome-assembly chaperone Nas2 PDZ domain
- Kansas State University, 338 Ackert Hall, Manhattan, KS 66506 (United States)
- University of Kansas, Del Shankel Structural Biology Center, Lawrence, KS 66047 (United States)
- IMCA-CAT Hauptman–Woodward Medical Research Institute, 9700 South Cass Avenue, Building 435A, Argonne, IL 60439 (United States)
The proteasome-assembly chaperone Nas2 binds to the proteasome subunit Rpt5 using its PDZ domain. The structure of the Nas2 PDZ domain has been determined. The 26S proteasome is a 2.5 MDa protease dedicated to the degradation of ubiquitinated proteins in eukaryotes. The assembly of this complex containing 66 polypeptides is assisted by at least nine proteasome-specific chaperones. One of these, Nas2, binds to the proteasomal AAA-ATPase subunit Rpt5. The PDZ domain of Nas2 binds to the C-terminal tail of Rpt5; however, it does not require the C-terminus of Rpt5 for binding. Here, the 1.15 Å resolution structure of the PDZ domain of Nas2 is reported. This structure will provide a basis for further insights regarding the structure and function of Nas2 in proteasome assembly.
- OSTI ID:
- 22375683
- Journal Information:
- Acta crystallographica. Section F, Structural biology communications, Journal Name: Acta crystallographica. Section F, Structural biology communications Journal Issue: Pt 4 Vol. 70; ISSN ACSFEN; ISSN 2053-230X
- Country of Publication:
- United States
- Language:
- English
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