1A54

PHOSPHATE-BINDING PROTEIN MUTANT A197C LABELLED WITH A COUMARIN FLUOROPHORE AND BOUND TO DIHYDROGENPHOSPHATE ION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of phosphate binding protein labeled with a coumarin fluorophore, a probe for inorganic phosphate.

Hirshberg, M.Henrick, K.Haire, L.L.Vasisht, N.Brune, M.Corrie, J.E.Webb, M.R.

(1998) Biochemistry 37: 10381-10385

  • DOI: 10.1021/bi980428z
  • Primary Citation of Related Structures:  1A55

  • PubMed Abstract: 
  • Crystal structures are presented for the A197C mutant of Escherichia coli phosphate binding protein (PBP) and the same mutant labeled at Cys197 with N-[2-(1-maleimidyl)ethyl]-7-(diethylamino)coumarin-3-carboxamide (MDCC). Both proteins are complexed ...

    Crystal structures are presented for the A197C mutant of Escherichia coli phosphate binding protein (PBP) and the same mutant labeled at Cys197 with N-[2-(1-maleimidyl)ethyl]-7-(diethylamino)coumarin-3-carboxamide (MDCC). Both proteins are complexed with inorganic phosphate. The latter molecule, MDCC-PBP, exhibits a large increase in fluorescence on binding inorganic phosphate. The resulting high-fluorescence state of the coumarin and the ability of this coumarin to monitor the conformational changes associated with inorganic phosphate binding are interpreted in terms of the specific interactions of MDCC with the protein. The structure helps to explain why this particular label gives a high-fluorescence state on binding inorganic phosphate, while several other related labels do not, and hence aids our general understanding of environmentally sensitive fluorescence probes on proteins.


    Related Citations: 
    • Mechanism of Inorganic Phosphate Interaction with Phosphate Binding Protein from Escherichia Coli
      Brune, M.,Hunter, J.L.,Howell, S.A.,Martin, S.R.,Hazlett, T.L.,Corrie, J.E.,Webb, M.R.
      (1998) Biochemistry 37: 10370


    Organizational Affiliation

    Division of Protein Structure, National Institute for Medical Research, Mill Hill, London, U.K. m-hirshb@anika.nimr.mrc.ac.uk




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 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MDC
Query on MDC

Download SDF File 
Download CCD File 
A
N-[2-(1-MALEIMIDYL)ETHYL]-7-DIETHYLAMINOCOUMARIN-3-CARBOXAMIDE
C20 H21 N3 O5
OJBZDUMTXGGVSP-KTKRTIGZSA-N
 Ligand Interaction
2HP
Query on 2HP

Download SDF File 
Download CCD File 
A
DIHYDROGENPHOSPHATE ION
H2 O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.177 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 41.498α = 90.00
b = 62.651β = 90.00
c = 122.608γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
CCP4model building
CCP4data scaling
MOSFLMdata reduction
CCP4phasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-10-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance