1RA1	Oxidoreductase	date	Oct 30, 1996
title	Dihydrofolate Reductase Complexed With Nicotinamide Adenine Dinucleotide Phosphate (Reduced Form)
authors	M.R.Sawaya, J.Kraut
compound		source
Molecule: Dihydrofolate Reductase Chain: A Synonym: Dhfr Ec: 1.5.1.3 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: C 1 2 1	R_factor 0.147 R_Free NULL
crystal cell	length a length b length c angle alpha angle beta angle gamma 74.890 59.230 38.900 90.00 106.27 90.00
method	X-Ray Diffraction	resolution	1.90 Å
ligand	CA, NAP	enzyme	Oxidoreductase E.C.1.5.1.3 BRENDA
related structures	by homologous chain: 1DRB, 1JOM
Gene Ontology	Chain Function Process Component A
Primary reference	Loop 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] (34 Kb) [Save to disk] Biological Unit Coordinates (1ra1.pdb1.gz) 29 Kb LPC: Ligand-Protein Contacts for 1RA1 CSU: Contacts of Structural Units for 1RA1 Likely Quarternary Molecular Structure file(s) for 1RA1 Structure Factors (78 Kb) Retrieve 1RA1 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1RA1 from S2C, [Save to disk] Re-refined 1ra1 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1RA1 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 1RA1

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 3D motif for 1RA1, from MSDmotif at EBI Genome occurence of 1RA1's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1ra1__, region [Jmol] [rasmolscript] [script source]     - Domain d1g1ra1, region A:1-118 [Jmol] [rasmolscript] [script source]     - Domain d1p1ra1, region A:1-163,A:340-374 [Jmol] [rasmolscript] [script source]     - Domain d7r1ra1, region A:1-221 [Jmol] [rasmolscript] [script source]     - Domain d1i1ra1, region A:2-101 [Jmol] [rasmolscript] [script source]     - Domain d1q1ra1, region A:2-114,A:248-319 [Jmol] [rasmolscript] [script source]     - Domain d1w1ra1, region A:246-534 [Jmol] [rasmolscript] [script source]     - Domain d1f1ra1, region A:3-147 [Jmol] [rasmolscript] [script source]     - Domain d1t1ra1, region A:301-397 [Jmol] [rasmolscript] [script source]     - Domain d1e1ra1, region A:380-510 [Jmol] [rasmolscript] [script source]     - Domain d1r1ra1, region A:4-221 [Jmol] [rasmolscript] [script source]     - Domain d4r1ra1, region A:5-221 [Jmol] [rasmolscript] [script source] 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: [1ra1] [1ra1_A] SWISS-PROT database: [P0ABQ4] Domain organization of [DYR_ECOLI] by SWISSPFAM

Other resources with information on 1RA1

Community annotation for 1RA1 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

Movements, Movies and Images

Domain movements in 1RA1 from the Database of Macromolecular Movements. Images from IMB Jena Image Library of Biological Macromolecules.

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