2INQ	Oxidoreductase	date	Oct 08, 2006
title	Neutron Crystal Structure Of Escherichia Coli Dihydrofolate Bound To The Anti-Cancer Drug, Methotrexate
authors	B.C.Bennett, P.A.Langan, L.Coates, B.Schoenborn, C.G.Dealwis
compound		source
Molecule: Dihydrofolate Reductase Chain: A, B Ec: 1.5.1.3 Engineered: Yes Mutation: Yes		Organism_scientific: Escherichia Coli K12 Organism_taxid: 83333 Strain: K-12 Gene: Fola Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Sk383 Expression_system_vector_type: Plasmid Expression_system_plasmid: Puc8-Ecdhfr
symmetry	Space Group: P 61	R_factor R_Free
crystal cell	length a length b length c angle alpha angle beta angle gamma 93.120 93.120 73.870 90.00 90.00 120.00
method	Neutron Diffraction	resolution	2.20 Å
ligand	MT1	enzyme	Oxidoreductase E.C.1.5.1.3 BRENDA
Gene Ontology	Chain Function Process Component A, B
Primary reference	Neutron diffraction studies of Escherichia coli dihydrofolate reductase complexed with methotrexate., Bennett B, Langan P, Coates L, Mustyakimov M, Schoenborn B, Howell EE, Dealwis C, Proc Natl Acad Sci U S A. 2006 Dec 5;103(49):18493-8. Epub 2006 Nov 27. PMID:17130456

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (113 Kb) [Save to disk] Biological Unit Coordinates (2inq.pdb1.gz) 53 Kb Biological Unit Coordinates (2inq.pdb2.gz) 55 Kb LPC: Ligand-Protein Contacts for 2INQ CSU: Contacts of Structural Units for 2INQ Likely Quarternary Molecular Structure file(s) for 2INQ Structure Factors (134 Kb) Retrieve 2INQ in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2INQ from S2C, [Save to disk]

View 2INQ 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 2INQ

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 2INQ, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2inq_B] [2inq] [2inq_A] SWISS-PROT database: [P0ABQ4] Domain organization of [DYR_ECOLI] by SWISSPFAM

Other resources with information on 2INQ

Community annotation for 2INQ at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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