1NQF Transport Protein date Jan 21, 2003
title Outer Membrane Cobalamin Transporter (Btub) From E. Coli, Me Substiution Construct For Se-Met Sad Phasing
authors D.P.Chimento, A.K.Mohanty, R.J.Kadner, M.C.Wiener
compound source
Molecule: Vitamin B12 Receptor
Chain: A
Synonym: Outer Membrane Cobalamin Transporter Btub
Engineered: Yes
Mutation: Yes
Organism_scientific: Escherichia Coli
Organism_taxid: 562
Gene: Btub
Expression_system: Escherichia Coli
Expression_system_taxid: 562
Expression_system_strain: B834(De3)Plyss
Expression_system_vector_type: Plasmid
Expression_system_plasmid: Pet22b
symmetry Space Group: P 31 2 1
R_factor 0.244 R_Free 0.288
crystal
cell
length a length b length c angle alpha angle beta angle gamma
81.614 81.614 226.653 90.00 90.00 120.00
method X-Ray Diffractionresolution 2.70 Å
ligand C8E, MG, MSE enzyme
related structures by homologous chain: 1NQE, 1UJW
Gene
Ontology
ChainFunctionProcessComponent
A
  • vitamin transmembrane transp...


  • Primary referenceSubstrate-induced transmembrane signaling in the cobalamin transporter BtuB., Chimento DP, Mohanty AK, Kadner RJ, Wiener MC, Nat Struct Biol 2003 May;10(5):394-401. PMID:12652322
    Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (102 Kb) [Save to disk]
  • Biological Unit Coordinates (1nqf.pdb1.gz) 92 Kb
  • LPC: Ligand-Protein Contacts for 1NQF
  • CSU: Contacts of Structural Units for 1NQF
  • Likely Quarternary Molecular Structure file(s) for 1NQF
  • Structure Factors (338 Kb)
  • Retrieve 1NQF in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1NQF from S2C, [Save to disk]
  • Re-refined 1nqf structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 1NQF 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 1NQF
  • 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 1NQF, from MSDmotif at EBI
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1nqfa_, region A [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: [1nqf] [1nqf_A]
  • SWISS-PROT database: [P06129]
  • Belongs to the outer membrane receptor (omr) family according to TCDB.
  • Domain organization of [BTUB_ECOLI] by SWISSPFAM
  • Other resources with information on 1NQF
  • Community annotation for 1NQF 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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