Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 21983.05 
• Atom Count: 1539 
• Residue Count: 186 
• Unique protein chains: 1

1DRF

CRYSTAL STRUCTURE OF HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH FOLATE

• DOI: 10.2210/pdb1DRF/pdb

• Classification: OXIDOREDUCTASE (CH-NH(D)-NAD OR NADP(A))
• Organism(s): Homo sapiens


• Deposited: 1990-08-09 Released: 1992-01-15 
• Deposition Author(s): Oefner, C., D'Arcy, A., Winkler, F.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å

Literature

Crystal structure of human dihydrofolate reductase complexed with folate.

Oefner, C., D'Arcy, A., Winkler, F.K.

(1988) Eur.J.Biochem. 174: 377-385

• PubMed: 3383852 


• PubMed Abstract: 
  

The crystal structure of recombinant human dihydrofolate reductase with folate bound in the active site has been determined and the structural model refined at 0.2-nm resolution. Preliminary studies of the binding of the inhibitors methotrexate and trimethoprim to the human apoenzyme have been performed at 0.35-nm resolution. The conformations of the chemically very similar ligands folate and methotrexate, one a substrate the other a potent inhibitor, differ substantially in that their pteridine rings are in inverse orientations relative to their p-aminobenzoyl-L-glutamate moieties. Methotrexate binding is similar to that previously observed in two bacterial enzymes but is quite different from that observed in the enzyme from a mouse lymphoma cell line [Stammers et al. (1987) FEBS Lett. 218, 178-184]. The geometry of the polypeptide chain around the folate binding site in the human enzyme is not consistent with conclusions previously drawn with regard to the species selectivity of the inhibitor trimethoprim [Matthews et al. (1985) J. Biol. Chem. 260, 392-399].

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Organizational Affiliation: 

Central Research Units, F. Hoffmann-La Roche & Co. Ltd, Basel, Switzerland.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
DIHYDROFOLATE REDUCTASE	A	186	Homo sapiens	Mutation(s): 0  Gene Names: DHFR EC: 1.5.1.3
Find proteins for P00374 (Homo sapiens) Go to Gene View: DHFR Go to UniProtKB:  P00374

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
FOL	A	FOLIC ACID C19 H19 N7 O6 OVBPIULPVIDEAO-LBPRGKRZSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
FOL	Kd: 111 nM BINDINGMOAD

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• Space Group: H 3

Unit Cell:

Length (Å)	Angle (°)
a = 86.290	α = 90.00
b = 86.290	β = 90.00
c = 76.980	γ = 120.00

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1990-08-09 
• Released Date: 1992-01-15 
• Deposition Author(s): Oefner, C., D'Arcy, A., Winkler, F.K.

Revision History 

• Version 1.0: 1992-01-15
  Type: Initial release
• Version 1.1: 2008-03-03
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance