1Q09

Crystal structure of the Zn(II) form of E. coli ZntR, a zinc-sensing transcriptional regulator (space group I4122)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.255 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular basis of metal-ion selectivity and zeptomolar sensitivity by CueR

Changela, A.Chen, K.Xue, Y.Holschen, J.Outten, C.E.O'Halloran, T.V.Mondragon, A.

(2003) Science 301: 1383-1387

  • DOI: 10.1126/science.1085950
  • Primary Citation of Related Structures:  1Q05, 1Q06, 1Q07, 1Q08, 1Q0A

  • PubMed Abstract: 
  • The earliest of a series of copper efflux genes in Escherichia coli are controlled by CueR, a member of the MerR family of transcriptional activators. Thermodynamic calibration of CueR reveals a zeptomolar (10(-21) molar) sensitivity to free Cu+, whi ...

    The earliest of a series of copper efflux genes in Escherichia coli are controlled by CueR, a member of the MerR family of transcriptional activators. Thermodynamic calibration of CueR reveals a zeptomolar (10(-21) molar) sensitivity to free Cu+, which is far less than one atom per cell. Atomic details of this extraordinary sensitivity and selectivity for +1transition-metal ions are revealed by comparing the crystal structures of CueR and a Zn2+-sensing homolog, ZntR. An unusual buried metal-receptor site in CueR restricts the metal to a linear, two-coordinate geometry and uses helix-dipole and hydrogen-bonding interactions to enhance metal binding. This binding mode is rare among metalloproteins but well suited for an ultrasensitive genetic switch.


    Organizational Affiliation

    Department of Biochemistry, Molecular Biology, and Cell Biology, Northwestern University, 2205Tech Drive, Evanston, IL 60208, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Zn(II)-responsive regulator of zntA
A
99Escherichia coli (strain K12)Gene Names: zntR (yhdM)
Find proteins for P0ACS5 (Escherichia coli (strain K12))
Go to UniProtKB:  P0ACS5
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.255 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 83.799α = 90.00
b = 83.799β = 90.00
c = 179.993γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
MOSFLMdata reduction
CNSrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-09-16
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance