3ECH	Transcription, Transcription Regulation	date	Aug 30, 2008
title	The Marr-Family Repressor Mexr In Complex With Its Antirepre
authors	M.S.Wilke, N.C.J.Strynadka
compound		source
Molecule: Multidrug Resistance Operon Repressor Chain: A, B Fragment: Residues 1-142 Synonym: Mexr Engineered: Yes Mutation: Yes		Organism_scientific: Pseudomonas Aeruginosa Organism_taxid: 287 Gene: Mexr, Pa0424 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Bl21 (De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet41a
Molecule: 25-Mer Fragment Of Protein Armr Chain: C Fragment: Residues 29-53 Engineered: Yes		Organism_scientific: Pseudomonas Aeruginosa Organism_taxid: 287 Gene: Pa3719 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Bl21 (De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Ptyb12
symmetry	Space Group: P 21 21 21	R_factor 0.176 R_Free 0.229
crystal cell	length a length b length c angle alpha angle beta angle gamma 52.201 57.151 91.931 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.80 Å
Gene Ontology	Chain Function Process Component A, B
Primary reference	The crystal structure of MexR from Pseudomonas aeruginosa in complex with its antirepressor ArmR., Wilke MS, Heller M, Creagh AL, Haynes CA, McIntosh LP, Poole K, Strynadka NC, Proc Natl Acad Sci U S A. 2008 Sep 30;105(39):14832-7. Epub 2008 Sep 23. PMID:18812515

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (59 Kb) [Save to disk] Biological Unit Coordinates (3ech.pdb1.gz) 52 Kb CSU: Contacts of Structural Units for 3ECH Likely Quarternary Molecular Structure file(s) for 3ECH Structure Factors (190 Kb) Retrieve 3ECH in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 3ECH from S2C, [Save to disk] Re-refined 3ech structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 3ECH 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 3ECH

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 3ECH, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [3ech] [3ech_C] [3ech_B] [3ech_A] SWISS-PROT database: [P52003] [Q9HXS2] Domain organization of [MEXR_PSEAE] [Q9HXS2_PSEAE] by SWISSPFAM Domain found in 3ECH: [HTH_MARR ] by SMART

Other resources with information on 3ECH

Community annotation for 3ECH at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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