5FIM

The structure of Kbp.K from E. coli


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST RESTRAINT ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Cytoplasmic Potassium Binding Protein Kbp is a Putative Potassium Sensor.

Ashraf, K.U.Josts, I.Mosbahi, K.Kelly, S.Byron, O.Smith, B.O.Walker, D.

(2016) Structure 24: 741

  • DOI: 10.1016/j.str.2016.03.017

  • PubMed Abstract: 
  • Escherichia coli possesses a number of specific K(+) influx and efflux systems that maintain an appropriate intracellular K(+) concentration. Although regulatory mechanisms have been identified for a number of these transport systems, the exact mecha ...

    Escherichia coli possesses a number of specific K(+) influx and efflux systems that maintain an appropriate intracellular K(+) concentration. Although regulatory mechanisms have been identified for a number of these transport systems, the exact mechanism through which K(+) concentration is sensed in the cell remains unknown. In this work we show that Kbp (K(+) binding protein, formerly YgaU), a soluble 16-kDa cytoplasmic protein from Escherichia coli, is a highly specific K(+) binding protein and is required for normal growth in the presence of high levels of external K(+). Kbp binds a single potassium ion with high specificity over Na(+) and other metal ions found in biological systems, although, in common with K(+) transporters, it also binds Rb(+) and Cs(+). Dissection of the K(+) binding determinants of Kbp suggests a mechanism through which Kbp is able to sense changes in K(+) concentration over the relevant range of intracellular K(+) concentrations.


    Organizational Affiliation

    Institute of Molecular Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
YGAU
A
157Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: kbp (ygaU, yzzM)
Find proteins for P0ADE6 (Escherichia coli (strain K12))
Go to UniProtKB:  P0ADE6
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST RESTRAINT ENERGY 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-05-04
    Type: Initial release
  • Version 1.1: 2016-05-18
    Type: Database references