Pteridine reductase from Leishmania tarentolae complex with NADPH and MTX

Experimental Data Snapshot

  • Resolution: 2.86 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.213 

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This is version 1.3 of the entry. See complete history


Structure of pteridine reductase (PTR1) from Leishmania tarentolae.

Zhao, H.Bray, T.Ouellette, M.Zhao, M.Ferre, R.A.Matthews, D.Whiteley, J.M.Varughese, K.I.

(2003) Acta Crystallogr D Biol Crystallogr 59: 1539-1544

  • DOI: https://doi.org/10.1107/s0907444903013131
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The protozoan parasites Leishmania utilize a pteridine-reducing enzyme, pteridine reductase (PTR1), to bypass antifolate inhibition. The crystal structure of PTR1 from L. tarentolae has been solved as a binary complex with NADPH at 2.8 A resolution. The structure was solved by molecular-replacement techniques using the recently reported L. major PTR1 structure as a search model. Comparisons of the present structure with the L. major PTR1 allowed us to identify regions of flexibility in the molecule. PTR1 is a member of the growing family of short-chain dehydrogenases (SDR) which share the characteristic Tyr(Xaa)(3)Lys motif in the vicinity of the active site. The functional enzyme is a tetramer and the crystallographic asymmetric unit contains a tetramer with 222 point-group symmetry.

  • Organizational Affiliation

    Department of Molecular and Experimental Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Pteridine reductase 1
A, B, C, D
289Leishmania tarentolaeMutation(s): 0 
Gene Names: PTR1 OR LTDH
Find proteins for P42556 (Leishmania tarentolae)
Explore P42556 
Go to UniProtKB:  P42556
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP42556
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.86 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.213 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.301α = 90
b = 96.103β = 90
c = 195.545γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-02
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description