KtrB

• Description: high affinity potassium transporter KtrA-KtrB, integral membrane subunit
  
  

Gene name	ktrB
Synonyms	yubG
Essential	no
Product	high affinity potassium transporter KtrA-KtrB, integral membrane subunit (proton symport)
Function	potassium uptake
Metabolic function and regulation of this protein in SubtiPathways: Stress
MW, pI	48 kDa, 10.116
Gene length, protein length	1335 bp, 445 aa
Immediate neighbours	ktrA, yubF
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Locus tag: BSU31100

Database entries

• DBTBS entry: no entry

• SubtiList entry: [1]

Categories containing this gene/protein

transporters/ other, metal ion homeostasis (K, Na, Ca, Mg), coping with hyper-osmotic stress, membrane proteins

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

• Protein family:

• Paralogous protein(s): KtrD

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: KtrA-KtrB PubMed

• Localization: cell membrane (according to Swiss-Prot), integral membrane protein PubMed

Database entries

• Structure:

• UniProt: O32081

• KEGG entry: [2]

• E.C. number:

Expression and regulation

• Operon: ktrA-ktrB PubMed

• Sigma factor:

• Regulation:

• Regulatory mechanism:
  • expression is controlled via termination antitermination by the ydaO riboswitch PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

Labs working on this gene/protein

Erhard Bremer, University of Marburg, Germany homepage

References

Kirsten F Block, Ming C Hammond, Ronald R Breaker
Evidence for widespread gene control function by the ydaO riboswitch candidate.
J Bacteriol: 2010, 192(15);3983-9
[PubMed:20511502] [WorldCat.org] [DOI] (I p)

Gudrun Holtmann, Evert P Bakker, Nobuyuki Uozumi, Erhard Bremer
KtrAB and KtrCD: two K+ uptake systems in Bacillus subtilis and their role in adaptation to hypertonicity.
J Bacteriol: 2003, 185(4);1289-98
[PubMed:12562800] [WorldCat.org] [DOI] (P p)