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ktrB [2017-10-25 12:59:50]
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ktrB [2017-10-25 12:59:50]

high affinity potassium transporter KtrA-KtrB, integral membrane subunit
Locus
BSU31100
Isoelectric point
10.12
Molecular weight
48.27 kDa
Protein length
445 aa Sequence Blast
Gene length
1335 bp Sequence Blast
Function
potassium uptake
Product
high affinity potassium transporter KtrA-KtrB, integral membrane subunit
Essential
no
Synonyms
yubG

Genomic Context

      
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Categories containing this gene/protein

Gene

Coordinates
3,189,089 → 3,190,426

Phenotypes of a mutant

  • a kimA ktrA ktrB mutant requires high potassium concentrations on minimal medium with ammonium as nitrogen source PubMed
  • The protein

    Paralogous protein(s)

    Structure

  • 4J7C (the KtrA-KtrB complex) PubMed
  • Localization

  • integral membrane protein PubMed
  • Expression and Regulation

    Operons

    Genes
    Description

    Regulatory mechanism

  • ydaO riboswitch: termination/antitermination, expression is switched off upon binding of c-di-AMP, in ydaO riboswitch
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    Additional information

  • growth at extreme potassium limitation results in the acquisition of promoter mutations with increased ktrA-ktrB expression PubMed
  • Biological materials

    Mutant

  • MGNA-A227 (yubG::erm), available at the NBRP B. subtilis, Japan
  • 1A954 ( ktrB::kan), PubMed, available at BGSC
  • GHB1 (ΔktrA-ktrB::aphA3), available in Erhard Bremer's lab
  • GP92 (ΔktrA-ktrB::aphA3), available in Jörg Stülke's lab PubMed
  • GP2083 (ΔktrA-ktrB::aphA3 ΔktrC::tet), available in Jörg Stülke's lab PubMed
  • BKE31100 (ΔktrB::erm trpC2) available at BGSC, PubMed, upstream reverse: _UP1_CACCTTTGTCTACATCCCTT, downstream forward: _UP4_TGATATCAAAAAAATCCGGC
  • BKK31100 (ΔktrB::kan trpC2) available at BGSC, PubMed, upstream reverse: _UP1_CACCTTTGTCTACATCCCTT, downstream forward: _UP4_TGATATCAAAAAAATCCGGC
  • FLAG-tag construct

  • GP2277 (based on pGP1331), available in Jörg Stülke's lab PubMed
  • Labs working on this gene/protein

  • Erhard Bremer, University of Marburg, Germany homepage
  • References

    Reviews

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    Original publications

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