Hfq

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  • Description: RNA chaperone

Gene name hfq
Synonyms ymaH
Essential no
Product RNA chaperone
Function unknown
MW, pI 8 kDa, 8.698
Gene length, protein length 219 bp, 73 aa
Immediate neighbours miaA, ymzC
Get the DNA and protein sequences
(Barbe et al., 2009)
Genetic context
YmaH context.gif
This image was kindly provided by SubtiList



Categories containing this gene/protein

RNA chaperones

This gene is a member of the following regulons

The gene

Basic information

  • Locus tag: BSU17340

Phenotypes of a mutant

Database entries

  • DBTBS entry: no entry
  • SubtiList entry: [1]

Additional information

The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity:
  • Protein family: hfq family (according to Swiss-Prot)
  • Paralogous protein(s):

Extended information on the protein

  • Kinetic information:
  • Domains:
  • Modification:
  • Cofactor(s):
  • Effectors of protein activity:
  • Interactions:
  • Localization:

Database entries

  • Structure: 3HSB (complex with an RNA aptamer) PubMed
  • KEGG entry: [2]
  • E.C. number:

Additional information

Expression and regulation

  • Operon:
  • Regulation: repressed by glucose (7.7-fold) PubMed
  • Regulatory mechanism:
  • Additional information:

Biological materials

  • Mutant: GP22 (cat), available in the Stülke lab
  • Expression vector:
  • lacZ fusion: pGP460 (in pAC7), available in Stülke lab
  • GFP fusion:
  • two-hybrid system: B. pertussis adenylate cyclase-based bacterial two hybrid system (BACTH), available in Stülke lab
  • Antibody:

Labs working on this gene/protein

Your additional remarks

References

Reviews

Jörg Vogel, Ben F Luisi
Hfq and its constellation of RNA.
Nat Rev Microbiol: 2011, 9(8);578-89
[PubMed:21760622] [WorldCat.org] [DOI] (I e)

Richard G Brennan, Todd M Link
Hfq structure, function and ligand binding.
Curr Opin Microbiol: 2007, 10(2);125-33
[PubMed:17395525] [WorldCat.org] [DOI] (P p)

Poul Valentin-Hansen, Maiken Eriksen, Christina Udesen
The bacterial Sm-like protein Hfq: a key player in RNA transactions.
Mol Microbiol: 2004, 51(6);1525-33
[PubMed:15009882] [WorldCat.org] [DOI] (P p)


Original publications

Tatsuhiko Someya, Seiki Baba, Mai Fujimoto, Gota Kawai, Takashi Kumasaka, Kouji Nakamura
Crystal structure of Hfq from Bacillus subtilis in complex with SELEX-derived RNA aptamer: insight into RNA-binding properties of bacterial Hfq.
Nucleic Acids Res: 2012, 40(4);1856-67
[PubMed:22053080] [WorldCat.org] [DOI] (I p)

Seiki Baba, Tatsuhiko Someya, Gota Kawai, Kouji Nakamura, Takashi Kumasaka
Expression, crystallization and preliminary crystallographic analysis of RNA-binding protein Hfq (YmaH) from Bacillus subtilis in complex with an RNA aptamer.
Acta Crystallogr Sect F Struct Biol Cryst Commun: 2010, 66(Pt 5);563-6
[PubMed:20445260] [WorldCat.org] [DOI] (I p)

Hans-Matti Blencke, Georg Homuth, Holger Ludwig, Ulrike Mäder, Michael Hecker, Jörg Stülke
Transcriptional profiling of gene expression in response to glucose in Bacillus subtilis: regulation of the central metabolic pathways.
Metab Eng: 2003, 5(2);133-49
[PubMed:12850135] [WorldCat.org] [DOI] (P p)