Macromolecule Content

• Total Structure Weight: 40.01 kDa 
• Atom Count: 1734 
• Residue Count: 214 
• Unique protein chains: 1

1QZE

HHR23a protein structure based on residual dipolar coupling data

• DOI: 10.2210/pdb1QZE/pdb

• Classification: REPLICATION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-09-16 Released: 2003-10-21 
• Deposition Author(s): Walters, K.J., Lech, P.J., Goh, A.M., Wang, Q., Howley, P.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 1 

Literature

DNA-repair protein hHR23a alters its protein structure upon binding proteasomal subunit S5a

Walters, K.J., Lech, P.J., Goh, A.M., Wang, Q., Howley, P.M.

(2003) Proc Natl Acad Sci U S A 100: 12694-12699

• PubMed: 14557549 
• DOI: 10.1073/pnas.1634989100
• Primary Citation of Related Structures:  
  1OQY, 1QZE


• PubMed Abstract: 
  

The Rad23 family of proteins, including the human homologs hHR23a and hHR23b, stimulates nucleotide excision repair and has been shown to provide a novel link between proteasome-mediated protein degradation and DNA repair. In this work, we illustrate how the proteasomal subunit S5a regulates hHR23a protein structure. By using NMR spectroscopy, we have elucidated the structure and dynamic properties of the 40-kDa hHR23a protein and show it to contain four structured domains connected by flexible linker regions. In addition, we reveal that these domains interact in an intramolecular fashion, and by using residual dipolar coupling data in combination with chemical shift perturbation analysis, we present the hHR23a structure. By itself, hHR23a adopts a closed conformation defined by the interaction of an N-terminal ubiquitin-like domain with two ubiquitin-associated domains. Interestingly, binding of the proteasomal subunit S5a disrupts the hHR23a interdomain interactions and thereby causes it to adopt an opened conformation.

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Organizational Affiliation: 

Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
UV excision repair protein RAD23 homolog A	A	368	Homo sapiens	Mutation(s): 0  Gene Names: RAD23A
Find proteins for P54725 (Homo sapiens) Explore P54725  Go to UniProtKB:  P54725
NIH Common Fund Data Resources
PHAROS:  P54725 GTEx:  ENSG00000179262

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 1 
• OLDERADO: 1QZE Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-09-16 
• Released Date: 2003-10-21 
Deposition Author(s): Walters, K.J., Lech, P.J., Goh, A.M., Wang, Q., Howley, P.M.

Revision History 

• Version 1.0: 2003-10-21
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance