1LIH

THREE-DIMENSIONAL STRUCTURES OF THE LIGAND-BINDING DOMAIN OF THE BACTERIAL ASPARTATE RECEPTOR WITH AND WITHOUT A LIGAND


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Three-dimensional structures of the ligand-binding domain of the bacterial aspartate receptor with and without a ligand.

Milburn, M.V.Prive, G.G.Milligan, D.L.Scott, W.G.Yeh, J.Jancarik, J.Koshland Jr., D.E.Kim, S.H.

(1991) Science 254: 1342-1347

  • Primary Citation of Related Structures:  2LIG

  • PubMed Abstract: 
  • The three-dimensional structure of an active, disulfide cross-linked dimer of the ligand-binding domain of the Salmonella typhimurium aspartate receptor and that of an aspartate complex have been determined by x-ray crystallographic methods at 2.4 an ...

    The three-dimensional structure of an active, disulfide cross-linked dimer of the ligand-binding domain of the Salmonella typhimurium aspartate receptor and that of an aspartate complex have been determined by x-ray crystallographic methods at 2.4 and 2.0 angstrom (A) resolution, respectively. A single subunit is a four-alpha-helix bundle with two long amino-terminal and carboxyl-terminal helices and two shorter helices that form a cylinder 20 A in diameter and more than 70 A long. The two subunits in the disulfide-bonded dimer are related by a crystallographic twofold axis in the apo structure, but by a noncrystallographic twofold axis in the aspartate complex structure. The latter structure reveals that the ligand binding site is located more than 60 A from the presumed membrane surface and is at the interface of the two subunits. Aspartate binds between two alpha helices from one subunit and one alpha helix from the other in a highly charged pocket formed by three arginines. The comparison of the apo and aspartate complex structures shows only small structural changes in the individual subunits, except for one loop region that is disordered, but the subunits appear to change orientation relative to each other. The structures of the two forms of this protein provide a step toward understanding the mechanisms of transmembrane signaling.


    Related Citations: 
    • Refined Structures of the Ligand-Binding Domain of the Aspartate Receptor from Salmonella Typhimurium
      Scott, W.G.,Milligan, D.L.,Milburn, M.V.,Prive, G.G.,Yeh, J.,Koshland Junior, D.E.,Kim, S.-H.
      (1993) J.Mol.Biol. 232: 555
    • The Three-Dimensional Structure of the Ligand-Binding Domain of a Wild-Type Bacterial Chemotaxis Receptor. Structural Comparison to the Cross-Linked Mutant Forms and Conformational Changes Upon Ligand Binding
      Yeh, J.I.,Biemann, H.-P.,Pandit, J.,Koshland, D.E.,Kim, S.-H.
      (1993) J.Biol.Chem. 268: 9787


    Organizational Affiliation

    Department of Chemistry, University of California, Berkeley 94720.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ASPARTATE RECEPTOR
A
164Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)Gene Names: tar (cheM)
Find proteins for P02941 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Go to UniProtKB:  P02941
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PHN
Query on PHN

Download SDF File 
Download CCD File 
A
1,10-PHENANTHROLINE
C12 H8 N2
DGEZNRSVGBDHLK-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Work: 0.188 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 80.030α = 90.00
b = 80.030β = 90.00
c = 155.600γ = 120.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORphasing
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-09-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance