1PBP

FINE TUNING OF THE SPECIFICITY OF THE PERIPLASMIC PHOSPHATE TRANSPORT RECEPTOR: SITE-DIRECTED MUTAGENESIS, LIGAND BINDING, AND CRYSTALLOGRAPHIC STUDIES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.147 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Fine tuning the specificity of the periplasmic phosphate transport receptor. Site-directed mutagenesis, ligand binding, and crystallographic studies.

Wang, Z.Choudhary, A.Ledvina, P.S.Quiocho, F.A.

(1994) J.Biol.Chem. 269: 25091-25094


  • PubMed Abstract: 
  • Phosphorous, primarily in the form of phosphate, is a critical nutrient for the life of a cell. We have previously determined the 1.7-A resolution structure of the phosphate-binding protein, an initial receptor for the high-affinity phosphate active ...

    Phosphorous, primarily in the form of phosphate, is a critical nutrient for the life of a cell. We have previously determined the 1.7-A resolution structure of the phosphate-binding protein, an initial receptor for the high-affinity phosphate active transport system or permease in Escherichia coli (Luecke, H., and Quiocho, F.A. (1990) Nature 347, 402-406). This structure is the first to reveal the key role of hydrogen bonding interactions in conferring the high specificity of the permease, a specificity also shared by other phosphate transport systems. Both monobasic and dibasic phosphates are recognized by the phosphate-binding protein with Asp56 playing a key role. Here we report site-directed mutagenesis, ligand binding, and crystallographic studies of the binding protein which show that introduction of one additional Asp by mutagenesis of the Thr141 in the ligand-binding site restricts binding to only the monobasic phosphate.


    Related Citations: 
    • Th E Immunodominant 38-kDa Lipoprotein Antigen of Mycobacterium Tuberculosis is a Phosphate-Binding Protein
      Chang, Z.,Choudhary, A.,Lathigra, R.,Quiocho, F.A.
      (1994) J.Biol.Chem. 269: 1956
    • High Specificity of a Phosphate Transport Protein Determined by Hydrogen Bonds
      Luecke, H.,Quiocho, F.A.
      (1990) Nature 347: 402


    Organizational Affiliation

    Structural and Computational Biology and Molecular Biophysics Program, Baylor College of Medicine, Houston, Texas 77030.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOSPHATE-BINDING PROTEIN
A
321Escherichia coli (strain K12)Gene Names: pstS (phoS)
Find proteins for P0AG82 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AG82
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.147 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 41.880α = 90.00
b = 64.570β = 90.00
c = 124.670γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORmodel building
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-10-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance