1TLF Transcription Regulation date Mar 06, 1995
title Unprecedented Quaternary Structure Of E. Coli Lac Repressor Tetramer: Implications For Dna Looping
authors A.M.Friedman, T.O.Fischmann, T.A.Steitz
compound source
Molecule: Lac Repressor
Chain: A, B, C, D
Engineered: Yes
 Organism_scientific: Escherichia Coli
Organism_taxid: 562
Expression_system_vector_type: Lac
symmetry Space Group: P 1 21 1
R_factor 0.222 R_Free NULL
crystal
cell
length a length b length c angle alpha angle beta angle gamma
90.160 64.730 117.940 90.00 91.75 90.00
method X-Ray Diffractionresolution 2.60 Å
ligand EMC, IPT enzyme
note 1TLF (Molecule of the Month:pdb39)
related structures by homologous chain: 1EFA, 1JYE
Primary referenceCrystal structure of lac repressor core tetramer and its implications for DNA looping., Friedman AM, Fischmann TO, Steitz TA, Science 1995 Jun 23;268(5218):1721-7. PMID:7792597
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (199 Kb) [Save to disk]
  • Biological Unit Coordinates (1tlf.pdb1.gz) 195 Kb
  • LPC: Ligand-Protein Contacts for 1TLF
  • CSU: Contacts of Structural Units for 1TLF
  • Likely Quarternary Molecular Structure file(s) for 1TLF
  • Retrieve 1TLF in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1TLF from S2C, [Save to disk]
    • View 1TLF 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 1TLF
  • Ramachandran plot from PDBSum
    • Structure-derived information
  • Dipole moment, from Dipole Server at Weizmann Institute
  • 3D motif for 1TLF, from MSDmotif at EBI
  • Genome occurence of 1TLF's fold from GeneCensus
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1tlfa_, region A [Jmol] [rasmolscript] [script source]
        - Domain d1tlfb_, region B [Jmol] [rasmolscript] [script source]
        - Domain d1tlfc_, region C [Jmol] [rasmolscript] [script source]
        - Domain d1tlfd_, region D [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: [1tlf_D] [1tlf] [1tlf_C] [1tlf_B] [1tlf_A]
  • SWISS-PROT database: [P03023]
  • Domain organization of [LACI_ECOLI] by SWISSPFAM
    • Other resources with information on 1TLF
  • Community annotation for 1TLF 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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