1QZF

Crystal structure of DHFR-TS from Cryptosporidium hominis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Phylogenetic classification of protozoa based on the structure of the linker domain in the bifunctional enzyme, dihydrofolate reductase-thymidylate synthase

O'Neil, R.H.Lilien, R.H.Donald, B.R.Stroud, R.M.Anderson, A.C.

(2003) J.Biol.Chem. 278: 52980-52987

  • DOI: 10.1074/jbc.M310328200

  • PubMed Abstract: 
  • We have determined the crystal structure of dihydrofolate reductase-thymidylate synthase (DHFR-TS) from Cryptosporidium hominis, revealing a unique linker domain containing an 11-residue alpha-helix that has extensive interactions with the opposite D ...

    We have determined the crystal structure of dihydrofolate reductase-thymidylate synthase (DHFR-TS) from Cryptosporidium hominis, revealing a unique linker domain containing an 11-residue alpha-helix that has extensive interactions with the opposite DHFR-TS monomer of the homodimeric enzyme. Analysis of the structure of DHFR-TS from C. hominis and of previously solved structures of DHFR-TS from Plasmodium falciparum and Leishmania major reveals that the linker domain primarily controls the relative orientation of the DHFR and TS domains. Using the tertiary structure of the linker domains, we have been able to place a number of protozoa in two distinct and dissimilar structural families corresponding to two evolutionary families and provide the first structural evidence validating the use of DHFR-TS as a tool of phylogenetic classification. Furthermore, the structure of C. hominis DHFR-TS calls into question surface electrostatic channeling as the universal means of dihydrofolate transport between TS and DHFR in the bifunctional enzyme.


    Organizational Affiliation

    Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
bifunctional dihydrofolate reductase-thymidylate synthase
A, B, C, D, E
521Cryptosporidium parvumMutation(s): 0 
Gene Names: DHFR-TS
Find proteins for Q27552 (Cryptosporidium parvum)
Go to UniProtKB:  Q27552
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CB3
Query on CB3

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Download CCD File 
A, B, C, D, E
10-PROPARGYL-5,8-DIDEAZAFOLIC ACID
C24 H23 N5 O6
LTKHPMDRMUCUEB-IBGZPJMESA-N
 Ligand Interaction
FOL
Query on FOL

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Download CCD File 
A, B, C, D, E
FOLIC ACID
C19 H19 N7 O6
OVBPIULPVIDEAO-LBPRGKRZSA-N
 Ligand Interaction
UMP
Query on UMP

Download SDF File 
Download CCD File 
A, B, C, D, E
2'-DEOXYURIDINE 5'-MONOPHOSPHATE
DUMP
C9 H13 N2 O8 P
JSRLJPSBLDHEIO-SHYZEUOFSA-N
 Ligand Interaction
NDP
Query on NDP

Download SDF File 
Download CCD File 
A, B, C, D, E
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.225 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 214.900α = 90.00
b = 116.300β = 95.23
c = 219.700γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
CNSphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-11-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance