5FMN

The nickel-responsive transcriptional regulator InrS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A tight tunable range for Ni(II) sensing and buffering in cells.

Foster, A.W.Pernil, R.Patterson, C.J.Scott, A.J.Palsson, L.O.Pal, R.Cummins, I.Chivers, P.T.Pohl, E.Robinson, N.J.

(2017) Nat. Chem. Biol. 13: 409-414

  • DOI: 10.1038/nchembio.2310

  • PubMed Abstract: 
  • The metal affinities of metal-sensing transcriptional regulators co-vary with cellular metal concentrations over more than 12 orders of magnitude. To understand the cause of this relationship, we determined the structure of the Ni(II) sensor InrS and ...

    The metal affinities of metal-sensing transcriptional regulators co-vary with cellular metal concentrations over more than 12 orders of magnitude. To understand the cause of this relationship, we determined the structure of the Ni(II) sensor InrS and then created cyanobacteria (Synechocystis PCC 6803) in which transcription of genes encoding a Ni(II) exporter and a Ni(II) importer were controlled by InrS variants with weaker Ni(II) affinities. Variant strains were sensitive to elevated nickel and contained more nickel, but the increase was small compared with the change in Ni(II) affinity. All of the variant sensors retained the allosteric mechanism that inhibits DNA binding following metal binding, but a response to nickel in vivo was observed only when the sensitivity was set to respond in a relatively narrow (less than two orders of magnitude) range of nickel concentrations. Thus, the Ni(II) affinity of InrS is attuned to cellular metal concentrations rather than the converse.


    Organizational Affiliation

    Department of Biosciences, Durham University, DH1 3LE, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INRS
A, B
107Synechocystis sp. (strain PCC 6803 / Kazusa)Mutation(s): 0 
Find proteins for Q55554 (Synechocystis sp. (strain PCC 6803 / Kazusa))
Go to UniProtKB:  Q55554
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.204 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 64.290α = 90.00
b = 77.790β = 90.00
c = 85.500γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
XDSdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-02-01
    Type: Initial release
  • Version 1.1: 2017-02-15
    Type: Database references
  • Version 1.2: 2017-03-29
    Type: Database references