Macromolecule Content

• Total Structure Weight: 8.95 kDa 
• Atom Count: 627 
• Residue Count: 78 
• Unique protein chains: 1

1P98

High-resolution NMR structure of the Ubl-domain of HHR23A

• DOI: 10.2210/pdb1P98/pdb

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


• Deposited: 2003-05-09 Released: 2003-10-07 
• Deposition Author(s): Mueller, T.D., Feigon, J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 120 
• Conformers Submitted: 11 
• Selection Criteria: structures with the lowest energy 

Literature

Structural determinants for the binding of ubiquitin-like domains to the proteasome.

Mueller, T.D., Feigon, J.

(2003) EMBO J 22: 4634-4645

• PubMed: 12970176 
• DOI: 10.1093/emboj/cdg467
• Primary Citation of Related Structures:  
  1P98, 1P9D, 1P9C


• PubMed Abstract: 
  

HHR23A, a protein implicated in nucleotide excision repair, belongs to a class of proteins containing both a ubiquitin-like (Ubl) domain and one or more ubiquitin-associated (UBA) domains, suggesting a role in the ubiquitin-proteasome pathway as well. The Ubl domain binds with high affinity to the second ubiquitin-interacting motif (UIM) of the S5a subunit of the proteasome. Here we present the solution structures of the HHR23A Ubl domain, the second UIM of S5a (UIM-2), and the Ubl:S5a-UIM-2 complex. The HHR23A Ubl domain is structurally similar to ubiquitin. The S5a UIM forms an alpha-helix with an unexpected hairpin loop that contributes to the binding interface with Ubl. The molecular determinants of the Ubl-proteasome interaction are revealed by analysis of the structures, chemical shift mapping, mutant binding studies and sequence conservation.

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Related Citations: 

• Solution Structures of UBA Domains Reveal a Conserved Hydrophobic Surface for Protein-Protein Interactions
  Mueller, T.D., Feigon, J.
  (2002) J Mol Biol 319: 1243

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, 405 Hilgard Avenue, PO Box 951569, University of California, Los Angeles, CA 90095-1569, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
UV excision repair protein RAD23 homolog A	A	78	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 Calculated: 120 
• Conformers Submitted: 11 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1P98 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-05-09 
• Released Date: 2003-10-07 
Deposition Author(s): Mueller, T.D., Feigon, J.

Revision History 

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