1LCD

STRUCTURE OF THE COMPLEX OF LAC REPRESSOR HEADPIECE AND AN 11 BASE-PAIR HALF-OPERATOR DETERMINED BY NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND RESTRAINED MOLECULAR DYNAMICS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the complex of lac repressor headpiece and an 11 base-pair half-operator determined by nuclear magnetic resonance spectroscopy and restrained molecular dynamics.

Chuprina, V.P.Rullmann, J.A.Lamerichs, R.M.van Boom, J.H.Boelens, R.Kaptein, R.

(1993) J.Mol.Biol. 234: 446-462

  • DOI: 10.1006/jmbi.1993.1598
  • Primary Citation of Related Structures:  1LCC

  • PubMed Abstract: 
  • The structure of the complex of lac repressor headpiece and an 11 base-pair lac half-operator has been determined by NMR spectroscopy and restrained Molecular Dynamics calculations. In total 508 distances were derived from two-dimensional nuclear Ove ...

    The structure of the complex of lac repressor headpiece and an 11 base-pair lac half-operator has been determined by NMR spectroscopy and restrained Molecular Dynamics calculations. In total 508 distances were derived from two-dimensional nuclear Overhauser enhancement measurements, 260 of which are within the headpiece, 212 within the operator and 36 between operator and headpiece. An equilibrium restrained Molecular Dynamics calculation of the complex in aqueous solution, spanning 85 picoseconds, has been used to analyze the structure. Configuration sampling by an annealing procedure has been undertaken as well in order to estimate the precision of the structure determination. Our data confirm the results of previous two-dimensional NMR studies that the orientation of the recognition helix of lac repressor in the major groove of DNA with respect to the operator dyad axis is opposite to the orientation found in complexes of other DNA binding proteins of the helix-turn-helix class. We find a number of tight contacts between the protein and the operator that are in agreement with the available genetic and biochemical data. The anchoring of lac headpiece on the operator is similar to that of other repressors. Other features are unique for lac headpiece: relative few direct hydrogen bonds between side-chains and bases; extensive apolar contacts; many direct and water-bridged contacts to phosphates from residues in or close to the recognition helix. Overall, an interconnected set of interactions is observed, involving base-specific contacts, phosphate contacts, intra-protein and water-bridged hydrogen bonds. Several of these interactions appear to be dynamic, i.e. fluctuating in time, rather than static.


    Related Citations: 
    • Two-Dimensional NMR Study of a Protein-DNA Complex. Lac Repressor Headpiece-Operator Interaction
      Kaptein, R.,Lamerichs, R.M.J.N.,Boelens, R.,Rullmann, J.A.C.
      (1990) Biochem.Pharm. 40: 89
    • 1H NMR Study of a Complex between the Lac Repressor Headpiece and a 22 Base Pair Symmetric Lac Operator
      Lamerichs, R.M.J.N.,Boelens, R.,Van Der Marel, G.A.,Van Boom, J.H.,Kaptein, R.,Buck, F.,Fera, B.,Rueterjans, H.
      (1989) Biochemistry 28: 2985
    • A Two-Dimensional NMR Study of the Complex of Lac Repressor Headpiece with a 14 Base Pair Lac Operator Fragment
      Boelens, R.,Scheek, R.M.,Lamerichs, R.M.J.N.,De Vlieg, J.,Van Boom, J.H.,Kaptein, R.
      (1987) Nato Asi Ser.,Ser.A 137: 191
    • Combined Procedure of Distance Geometry and Restrained Molecular Dynamics Techniques for Protein Structure Determination from Nuclear Magnetic Resonance Data: Application to the DNA Binding Domain of Lac Repressor from Escherichia Coli
      De Vlieg, J.,Scheek, R.M.,Van Gunsteren, W.F.,Berendsen, H.J.C.,Kaptein, R.,Thomason, J.
      (1988) Proteins 3: 209
    • The Interaction of Lac Repressor Headpiece with its Operator: An NMR View
      Boelens, R.,Lamerichs, R.M.J.N.,Rullmann, J.A.C.,Van Boom, J.H.,Kaptein, R.
      (1988) Protein Seq.Data Anal. 1: 487
    • Restrained Molecular Dynamics Procedure for Protein Tertiary Structure Determination from NMR Data: A Lac Repressor Headpiece Structure Based on Information on J-Coupling and from Presence and Absence of Noes
      De Vlieg, J.,Boelens, R.,Scheek, R.M.,Kaptein, R.,Van Gunsteren, W.F.
      (1986) Isr.J.Chem. 27: 181
    • Complex of Lac Repressor Headpiece with a 14 Base Pair Lac Operator Fragment Studied by Two-Dimensional Nuclear Magnetic Resonance
      Boelens, R.,Scheek, R.M.,Van Boom, J.H.,Kaptein, R.
      (1987) J.Mol.Biol. 193: 213
    • NMR Based Docking Studies of Lac Repressor Headpiece on a Lac Operator Fragment
      Rullmann, J.A.C.,Boelens, R.,Kaptein, R.
      (1989) Ucla Symp.Mol.Cell.Biol., New Ser. 95: 11
    • Assignment of the 1H-NMR Spectrum of a Lac Repressor Headpiece-Operator Complex in H2O and Identification of Noes. Consequences for Protein-DNA Interaction
      Lamerichs, R.M.J.N.,Boelens, R.,Van Der Marel, G.A.,Van Boom, J.H.,Kaptein, R.
      (1990) Eur.J.Biochem. 194: 629


    Organizational Affiliation

    Bijvoet Center for Biomolecular Research, University of Utrecht, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Lac Repressor
A
51Escherichia coli (strain K12)Gene Names: lacI
Find proteins for P03023 (Escherichia coli (strain K12))
Go to UniProtKB:  P03023
Entity ID: 1
MoleculeChainsLengthOrganism
DNA (5'-D(*AP*AP*TP*TP*GP*TP*GP*AP*GP*CP*G)-3')B11N/A
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*CP*GP*CP*TP*CP*AP*CP*AP*AP*TP*T)-3')C11N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
C
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • Olderado: 1LCD Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance