1PWY

CRYSTAL STRUCTURE OF HUMAN PNP COMPLEXED WITH ACYCLOVIR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.3 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


  • 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 a ...

    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.


    Related Citations: 
    • Application of Crystallographic and Modeling Methods in the Design of Purine Nucleoside Phosphorylase Inhibitors
      Ealick, S.E.,Babu, Y.S.,Bugg, C.E.,Erion, M.D.,Guida, W.C.,Montgomery, J.A.,Secrist III, J.A.
      (1991) Proc.Natl.Acad.Sci.USA 88: 11540


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Purine nucleoside phosphorylase
E
288Homo sapiensMutation(s): 0 
Gene Names: PNP (NP)
EC: 2.4.2.1
Find proteins for P00491 (Homo sapiens)
Go to Gene View: PNP
Go to UniProtKB:  P00491
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
E
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
AC2
Query on AC2

Download SDF File 
Download CCD File 
E
9-HYROXYETHOXYMETHYLGUANINE
C8 H11 N5 O3
MKUXAQIIEYXACX-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
AC2Ki: 180000 nM (99) BINDINGDB
AC2Ki: 90000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.215 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 139.060α = 90.00
b = 139.060β = 90.00
c = 160.570γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
CCP4data scaling
MOSFLMdata reduction
SCALAdata scaling
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-03-23
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2018-01-24
    Type: Database references