1RCT

Crystal structure of Human purine nucleoside phosphorylase complexed with INOSINE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Structures of human purine nucleoside phosphorylase complexed with inosine and ddI

Canduri, F.dos Santos, D.M.Silva, R.G.Mendes, M.A.Basso, L.A.Palma, M.S.de Azevedo Jr., W.F.Santos, D.S.

(2004) Biochem Biophys Res Commun 313: 907-914

  • DOI: https://doi.org/10.1016/j.bbrc.2003.11.179
  • Primary Citation of Related Structures:  
    1RCT, 1V3Q

  • PubMed Abstract: 

    Human purine nucleoside phosphorylase (PNP) is a ubiquitous enzyme which plays a key role in the purine salvage pathway, and PNP deficiency in humans leads to an impairment of T-cell function, usually with no apparent effect on B-cell function. PNP is highly specific for 6-oxopurine nucleosides and exhibits negligible activity for 6-aminopurine nucleosides. The catalytic efficiency for inosine is 350,000-fold greater than for adenosine. Adenine nucleosides and nucleotides are deaminated by adenosine deaminase and AMP deaminase to their corresponding inosine derivatives which, in turn, may be further degraded. Here we report the crystal structures of human PNP in complex with inosine and 2('),3(')-dideoxyinosine, refined to 2.8A resolution using synchrotron radiation. The present structures provide explanation for ligand binding, refine the purine-binding site, and can be used for future inhibitor design.


  • Organizational Affiliation

    Departamento de Física, UNESP, São José do Rio Preto, SP 15054-000, Brazil.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Purine nucleoside phosphorylaseA [auth E]288Homo sapiensMutation(s): 0 
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: 0.290 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 140.99α = 90
b = 140.99β = 90
c = 161.13γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement
MOSFLMdata reduction
CCP4data scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-01-20
    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: 2023-10-25
    Changes: Data collection, Database references, Derived calculations, Refinement description