1V3Q

Structure of human PNP complexed with DDI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.214 

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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: 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 ...

    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.


    Related Citations: 
    • Crystal Structure of Human Purine Nucleoside Phosphorylase at 2.3A Resolution
      De Azevedo Jr., W.F., Canduri, F., Dos Santos, D.M., Silva, R.G., de Oliveira, J.S., de Carvalho, L.P., Basso, L.A., Mendes, M.A., Palma, M.S., Santos, D.S.
      (2003) Biochem Biophys Res Commun 308: 545

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Purine nucleoside phosphorylaseA [auth E]288Homo sapiensMutation(s): 0 
Gene Names: PNPNP
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
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2DI (Subject of Investigation/LOI)
Query on 2DI

Download Ideal Coordinates CCD File 
E9-[(2R,5R)-5-(HYDROXYMETHYL)TETRAHYDROFURAN-2-YL]-1,9-DIHYDRO-6H-PURIN-6-ONE
C10 H12 N4 O3
BXZVVICBKDXVGW-NKWVEPMBSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
B [auth E], C [auth E], D [auth E]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.214 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 141.33α = 90
b = 141.33β = 90
c = 161.45γ = 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 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-01-20
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2012-07-18
    Changes: Non-polymer description