1VIE

STRUCTURE OF DIHYDROFOLATE REDUCTASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Work: 0.192 
  • R-Value Observed: 0.192 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A plasmid-encoded dihydrofolate reductase from trimethoprim-resistant bacteria has a novel D2-symmetric active site.

Narayana, N.Matthews, D.A.Howell, E.E.Nguyen-huu, X.

(1995) Nat Struct Biol 2: 1018-1025

  • DOI: 10.1038/nsb1195-1018
  • Primary Citation of Related Structures:  
    1VIF, 1VIE

  • PubMed Abstract: 
  • Bacteria expressing R67-plasmid encoded dihydrofolate reductase (R67 DHFR) exhibit high-level resistance to the antibiotic trimethoprim. Native R67 DHFR is a 34,000 M(r) homotetramer which exists in equilibrium with an inactive dimeric form. The structure of native R67 DHFR has now been solved at 1 ...

    Bacteria expressing R67-plasmid encoded dihydrofolate reductase (R67 DHFR) exhibit high-level resistance to the antibiotic trimethoprim. Native R67 DHFR is a 34,000 M(r) homotetramer which exists in equilibrium with an inactive dimeric form. The structure of native R67 DHFR has now been solved at 1.7 A resolution and is unrelated to that of chromosomal DHFR. Homotetrameric R67 DHFR has an unusual pore, 25 A in length, passing through the middle of the molecule. Two folate molecules bind asymmetrically within the pore indicating that the enzyme's active site consists of symmetry related binding surfaces from all four identical units.


    Related Citations: 
    • Does R67 Dihydrofolate Reductase Possess a Proton Donor?
      Holland, J.C., Linn, C.E., Digiammarino, E., Nichols, R., Howell, E.E.
      (1993) Adv Exp Med Biol 338: 493
    • Construction of a Synthetic Gene for an R-Plasmid-Encoded Dihydrofolate Reductase and Studies on the Role of the N-Terminus in the Protein
      Reece, L.J., Nichols, R., Ogden, R.C., Howell, E.E.
      (1991) Biochemistry 30: 10895
    • Crystal Structure of a Novel Trimethoprim-Resistant Dihydrofolate Reductase Specified in Escherichia Coli by R-Plasmid R67
      Matthews, D.A., Smith, S.L., Baccanari, D.P., Burchall, J.J., Oatley, S.J., Kraut, J.
      (1986) Biochemistry 25: 4194
    • The Amino Acid Sequence of the Trimethoprim-Resistant Dihydrofolate Reductase Specified in Escherichia Coli by R-Plasmid R67
      Stone, D., Smith, S.L.
      (1979) J Biol Chem 254: 10857
    • Trimethoprim Resistance Determined by R Factors
      Fleming, M.P., Datta, N., Gruneberg, R.N.
      (1972) Br Med J 1: 726

    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla 92093, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DIHYDROFOLATE REDUCTASEA62Escherichia coliMutation(s): 0 
Gene Names: SYNTHETIC GENE
EC: 1.5.1.3
UniProt
Find proteins for P00383 (Escherichia coli)
Explore P00383 
Go to UniProtKB:  P00383
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Work: 0.192 
  • R-Value Observed: 0.192 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.74α = 90
b = 68.74β = 90
c = 52.45γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
UCSDdata reduction
UCSDdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-10-22
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance