1LBH Transcription Regulation date Feb 17, 1996
title Intact Lactose Operon Repressor With Gratuitous Inducer Iptg
authors M.Lewis, G.Chang, N.C.Horton, M.A.Kercher, H.C.Pace, P.Lu
compound source
Molecule: Intact Lactose Operon Repressor With Gratuitous I Iptg;
Chain: A, B, C, D
Engineered: Yes
Organism_scientific: Escherichia Coli
Organism_taxid: 562
Strain: Gm1
Gene: Lac I
Expression_system: Escherichia Coli
Expression_system_taxid: 562
Expression_system_vector_type: Lac
Expression_system_plasmid: Piq
Expression_system_gene: Lac I
symmetry Space Group: P 21 2 21
R_factor 0.230 R_Free NULL
length a length b length c angle alpha angle beta angle gamma
141.200 75.100 149.200 90.00 90.00 90.00
method X-Ray Diffractionresolution 3.20 Å
ligand IPT enzyme
A, D, C, B

Primary referenceCrystal structure of the lactose operon repressor and its complexes with DNA and inducer., Lewis M, Chang G, Horton NC, Kercher MA, Pace HC, Schumacher MA, Brennan RG, Lu P, Science 1996 Mar 1;271(5253):1247-54. PMID:8638105
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (178 Kb) [Save to disk]
  • Biological Unit Coordinates (1lbh.pdb1.gz) 172 Kb
  • LPC: Ligand-Protein Contacts for 1LBH
  • CSU: Contacts of Structural Units for 1LBH
  • Likely Quarternary Molecular Structure file(s) for 1LBH
  • Retrieve 1LBH in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1LBH from S2C, [Save to disk]
  • View 1LBH 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 1LBH
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 1LBH, from MSDmotif at EBI
  • Genome occurence of 1LBH's fold from GeneCensus
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1lbha_, region A [Jmol] [rasmolscript] [script source]
        - Domain d1lbhb_, region B [Jmol] [rasmolscript] [script source]
        - Domain d1lbhc_, region C [Jmol] [rasmolscript] [script source]
        - Domain d1lbhd_, region D [Jmol] [rasmolscript] [script source]
  • Fold representative 1lbh 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: [1lbh_A] [1lbh_C] [1lbh_B] [1lbh_D] [1lbh]
  • SWISS-PROT database: [P03023]
  • Domain organization of [LACI_ECOLI] by SWISSPFAM
  • Domain found in 1LBH: [HTH_LACI ] by SMART
  • Other resources with information on 1LBH
  • Community annotation for 1LBH 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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