1F4I

SOLUTION STRUCTURE OF THE HHR23A UBA(2) MUTANT P333E, DEFICIENT IN BINDING THE HIV-1 ACCESSORY PROTEIN VPR


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.2 of the entry. See complete history


Literature

Biochemical and structural analysis of the interaction between the UBA(2) domain of the DNA repair protein HHR23A and HIV-1 Vpr.

Withers-Ward, E.S.Mueller, T.D.Chen, I.S.Feigon, J.

(2000) Biochemistry 39: 14103-14112

  • DOI: 10.1021/bi0017071
  • Primary Citation of Related Structures:  
    1F4I, 1DV0

  • PubMed Abstract: 
  • The DNA repair protein HHR23A is a highly conserved protein that functions in nucleotide excision repair. HHR23A contains two ubiquitin associated domains (UBA) that are conserved in a number of proteins with diverse functions involved in ubiquitination, UV excision repair, and signaling pathways via protein kinases ...

    The DNA repair protein HHR23A is a highly conserved protein that functions in nucleotide excision repair. HHR23A contains two ubiquitin associated domains (UBA) that are conserved in a number of proteins with diverse functions involved in ubiquitination, UV excision repair, and signaling pathways via protein kinases. The cellular binding partners of UBA domains remain unclear; however, we previously found that the HHR23A UBA(2) domain interacts specifically with the HIV-1 Vpr protein. Analysis of the low resolution solution structure of HHR23A UBA(2) revealed a hydrophobic loop region of the UBA(2) domain that we predicted was the interface for protein/protein interactions. Here we present results of in vitro binding studies that demonstrate the requirement of this hydrophobic loop region for interaction with human immunodeficiency virus (HIV-1) Vpr. A single point mutation of the Pro at residue 333 to a Glu totally abolishes the binding of HIV-1 Vpr to UBA(2). High resolution NMR structures of the binding deficient UBA(2) mutant P333E as well as of the wild-type UBA(2) domain were determined to compare the effect of this mutation on the structure. Small but significant differences are observed only locally at the site of the mutation. The biochemical and structural analysis confirms the function of the HHR23A UBA(2) GFP-loop as the protein/protein interacting domain.


    Related Citations: 
    • Structure of a human DNA repair protein UBA domain that interacts with HIV-1 Vpr
      Dieckmann, T., Withers-Ward, E.S., Jarosinski, M.A., Liu, C.F., Chen, I.S.Y., Feigon, J.
      (1998) Nat Struct Biol 5: 1042

    Organizational Affiliation

    Department of Microbiology, University of California at Los Angeles, Los Angeles, California 90095, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
UV EXCISION REPAIR PROTEIN PROTEIN RAD23 HOMOLOG A A45N/AMutation(s): 1 
Find proteins for P54725 (Homo sapiens)
Explore P54725 
Go to UniProtKB:  P54725
NIH Common Fund Data Resources
PHAROS:  P54725
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1F4I Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-12-20
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance