1RB3 Oxidoreductase date Nov 26, 1996
title Dihydrofolate Reductase Complexed With Methotrexate And Nicotinamide Adenine Dinucleotide Phosphate (Oxidized Form)
authors M.R.Sawaya, J.Kraut
compound source
Molecule: Dihydrofolate Reductase
Chain: A, B
Synonym: Dhfr
Engineered: Yes
Organism_scientific: Escherichia Coli
Organism_taxid: 562
Strain: Rt500
Expression_system: Escherichia Coli
Expression_system_taxid: 562
Expression_system_plasmid: Prwa-1
symmetry Space Group: P 1 21 1
R_factor 0.161 R_Free NULL
length a length b length c angle alpha angle beta angle gamma
41.580 74.180 59.180 90.00 99.26 90.00
method X-Ray Diffractionresolution 2.30 Å
ligand MTX, NAP BindingDB enzyme Oxidoreductase E.C. BRENDA
related structures by homologous chain: 1DDS, 1RX5
A, B

Primary referenceLoop and subdomain movements in the mechanism of Escherichia coli dihydrofolate reductase: crystallographic evidence., Sawaya MR, Kraut J, Biochemistry 1997 Jan 21;36(3):586-603. PMID:9012674
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (63 Kb) [Save to disk]
  • Biological Unit Coordinates (1rb3.pdb1.gz) 59 Kb
  • LPC: Ligand-Protein Contacts for 1RB3
  • CSU: Contacts of Structural Units for 1RB3
  • Likely Quarternary Molecular Structure file(s) for 1RB3
  • Structure Factors (86 Kb)
  • Retrieve 1RB3 in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1RB3 from S2C, [Save to disk]
  • Re-refined 1rb3 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 1RB3 in 3D
  • Proteopedia, because life has more than 2D.
  • On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure.
  • On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.
  • Visual 3D analysis of 1RB3
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Electron Density related parameters from EDS Electron Density Server, at Upsala
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 1RB3, from MSDmotif at EBI
  • Genome occurence of 1RB3's fold from GeneCensus
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1rb3a_, region A [Jmol] [rasmolscript] [script source]
        - Domain d1rb3b_, region B [Jmol] [rasmolscript] [script source]
        - Domain d1t1rb3, region B:275-300 [Jmol] [rasmolscript] [script source]
        - Domain d1q1rb3, region B:320-422 [Jmol] [rasmolscript] [script source]
        - Domain d1e1rb3, region B:95-379 [Jmol] [rasmolscript] [script source]
  • Fold representative 1rb3 from FSSP and Dali (Families of Structurally Similar Proteins)
  • Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH
  • Summaries and structural analyses of PDB data files from PDBSum
  • Identification of Protein Pockets & Cavities at CASTp
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [1rb3] [1rb3_B] [1rb3_A]
  • SWISS-PROT database: [P0ABQ4]
  • Domain organization of [DYR_ECOLI] by SWISSPFAM
  • Other resources with information on 1RB3
  • Community annotation for 1RB3 at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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