HprK

• Description: HPr kinase/ phosphorylase
  
  

Gene name	hprK
Synonyms	ptsK, yvoB
Essential	no
Product	HPr kinase/ phosphorylase
Function	carbon catabolite repression, phosphorylation of HPr and Crh proteins at Ser46
Metabolic function and regulation of this protein in SubtiPathways: Central C-metabolism, Protein secretion
MW, pI	34 kDa, 4.906
Gene length, protein length	930 bp, 310 aa
Immediate neighbours	lgt, nagA
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

Categories containing this gene/protein

protein modification, transcription factors and their control

The gene

Basic information

• Locus tag: BSU35000

Phenotypes of a mutant

no carbon catabolite repression

Database entries

• DBTBS entry: no entry

• SubtiList entry: [1]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: ATP + HPr = ADP + P-Ser-HPr (according to Swiss-Prot)

• Protein family: HPrK/P family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: HprK- HPr, HprK-Crh PubMed

• Localization:

Database entries

• Structure: 1KKM (complex of Lactobacillus casei HprK with B. subtilis HPr-Ser-P), 1KKL (complex of Lactobacillus casei HprK with B. subtilis HPr)

• UniProt: O34483

• KEGG entry: [2]

• E.C. number:

Expression and regulation

• Operon: hprK-lgt-yvoD-yvoE-yvoF PubMed

• Sigma factor:

• Regulation:

• Regulatory mechanism:

• Additional information:

Biological materials

• Mutant: GP202 (spc), GP858 (aphA3), both available in Stülke lab

• Expression vector:
  • for expression/ purification from B. subtilis with N-terminal Strep-tag, for SPINE, in pGP380: pGP642, available in Stülke lab
  • for expression/ purification of mutant HprK-G158A from B. subtilis with N-terminal Strep-tag, for SPINE, in pGP380: pGP650, available in Stülke lab
  • for expression/ purification from E. coli with N-terminal His-tag, in pWH844: pGP205, available in Stülke lab
  • for expression, purification of the N-terminal in E. coli with N-terminal His-tag, in pWH844: pGP218, available in Stülke lab

• lacZ fusion: pGP201 (in pAC5) available in Stülke lab, pGP202 (in pAC6) available in Stülke lab

• GFP fusion:

• two-hybrid system:

• Antibody: available in Stülke lab

Labs working on this gene/protein

Josef Deutscher, Paris-Grignon, France

Jörg Stülke, University of Göttingen, Germany Homepage

Wolfgang Hillen, Erlangen University, Germany Homepage

Anne Galinier, University of Marseille, France

References

Reviews

Boris Görke, Jörg Stülke
Carbon catabolite repression in bacteria: many ways to make the most out of nutrients.
Nat Rev Microbiol: 2008, 6(8);613-24
[PubMed:18628769] [WorldCat.org] [DOI] (I p)

Sandrine Poncet, Ivan Mijakovic, Sylvie Nessler, Virginie Gueguen-Chaignon, Vincent Chaptal, Anne Galinier, Grégory Boël, Alain Mazé, Josef Deutscher
HPr kinase/phosphorylase, a Walker motif A-containing bifunctional sensor enzyme controlling catabolite repression in Gram-positive bacteria.
Biochim Biophys Acta: 2004, 1697(1-2);123-35
[PubMed:15023355] [WorldCat.org] [DOI] (P p)

Sylvie Nessler, Sonia Fieulaine, Sandrine Poncet, Anne Galinier, Josef Deutscher, Joël Janin
HPr kinase/phosphorylase, the sensor enzyme of catabolite repression in Gram-positive bacteria: structural aspects of the enzyme and the complex with its protein substrate.
J Bacteriol: 2003, 185(14);4003-10
[PubMed:12837773] [WorldCat.org] [DOI] (P p)