1PWY

CRYSTAL STRUCTURE OF HUMAN PNP COMPLEXED WITH ACYCLOVIR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.215 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Literature

Crystal structure of human purine nucleoside phosphorylase complexed with acyclovir.

dos Santos, D.M.Canduri, F.Pereira, J.H.Vinicius Bertacine Dias, M.Silva, R.G.Mendes, M.A.Palma, M.S.Basso, L.A.de Azevedo, W.F.Santos, D.S.

(2003) Biochem Biophys Res Commun 308: 553-559

  • DOI: https://doi.org/10.1016/s0006-291x(03)01433-5
  • Primary Citation of Related Structures:  
    1PWY

  • PubMed Abstract: 

    In human, purine nucleoside phosphorylase (HsPNP) is responsible for degradation of deoxyguanosine and genetic deficiency of this enzyme leads to profound T-cell mediated immunosuppression. PNP is therefore a target for inhibitor development aiming at T-cell immune response modulation and has been submitted to extensive structure-based drug design. This work reports the first crystallographic study of human PNP complexed with acyclovir (HsPNP:Acy). Acyclovir is a potent clinically useful inhibitor of replicant herpes simplex virus that also inhibits human PNP but with a relatively lower inhibitory activity (K(i)=90 microM). Analysis of the structural differences among the HsPNP:Acy complex, PNP apoenzyme, and HsPNP:Immucillin-H provides explanation for inhibitor binding, refines the purine-binding site, and can be used for future inhibitor design.


  • Organizational Affiliation

    Departamento de Física, UNESP, São José do Rio Preto, SP, Brazil.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Purine nucleoside phosphorylaseA [auth E]288Homo sapiensMutation(s): 0 
Gene Names: PNP
EC: 2.4.2.1
UniProt & NIH Common Fund Data Resources
Find proteins for P00491 (Homo sapiens)
Explore P00491 
Go to UniProtKB:  P00491
PHAROS:  P00491
GTEx:  ENSG00000198805 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00491
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.215 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 139.06α = 90
b = 139.06β = 90
c = 160.57γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing
X-PLORrefinement
CCP4data scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2004-03-23
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2018-01-24
    Changes: Database references
  • Version 1.4: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description