Difference between revisions of "Hfq"

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=Expression and regulation=
 
=Expression and regulation=
  
* '''Operon:'''  
+
* '''Operon:''' ''[[hfq]]'' {{PubMed|23457461}}   
  
 
* '''Expression browser:''' [http://genome.jouy.inra.fr/cgi-bin/seb/viewdetail.py?id=ymaH_1867373_1867594_1 hfq] {{PubMed|22383849}}
 
* '''Expression browser:''' [http://genome.jouy.inra.fr/cgi-bin/seb/viewdetail.py?id=ymaH_1867373_1867594_1 hfq] {{PubMed|22383849}}
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* '''[[Sigma factor]]:'''  
 
* '''[[Sigma factor]]:'''  
  
* '''Regulation:''' repressed by glucose (7.7-fold) [http://www.ncbi.nlm.nih.gov/pubmed/12850135 PubMed]   
+
* '''Regulation:'''  
 +
** repressed by glucose (7.7-fold) [http://www.ncbi.nlm.nih.gov/pubmed/12850135 PubMed]
 +
** expression (mRNA levels) is quite constant during growth in minimal medium {{PubMed|23457461}} 
 +
** the Hfq protein amount increases upon transition to stationary phase {{PubMed|23457461}}  
  
 
* '''Regulatory mechanism:'''  
 
* '''Regulatory mechanism:'''  
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=Biological materials =
 
=Biological materials =
  
* '''Mutant:''' GP22 (cat), available in the [[Stülke]] lab
+
* '''Mutant:''' GP22 (cat), available in the [[Jörg Stülke]]'s lab
  
 
* '''Expression vector:'''
 
* '''Expression vector:'''
 
          
 
          
* '''lacZ fusion:''' pGP460 (in [[pAC7]]), available in [[Stülke]] lab
+
* '''lacZ fusion:''' pGP460 (in [[pAC7]]), available in [[Jörg Stülke]]'s lab
  
 
* '''GFP fusion:'''
 
* '''GFP fusion:'''
  
* '''two-hybrid system:''' B. pertussis adenylate cyclase-based bacterial two hybrid system ([[BACTH]]), available in [[Stülke]] lab
+
* '''two-hybrid system:''' B. pertussis adenylate cyclase-based bacterial two hybrid system ([[BACTH]]), available in [[Jörg Stülke]]'s lab
  
 
* '''FLAG-tag construct:'''  
 
* '''FLAG-tag construct:'''  
Line 140: Line 143:
  
 
==Original publications==
 
==Original publications==
'''Additional publications:''' {{PubMed|22965117,22053080}}
+
<pubmed>12850135, 20445260 23457461 22965117,22053080</pubmed>
<pubmed>12850135, 20445260 23457461 </pubmed>
 
 
[[Category:Protein-coding genes]]
 
[[Category:Protein-coding genes]]

Revision as of 16:53, 28 March 2013

  • Description: RNA chaperone

Gene name hfq
Synonyms ymaH
Essential no
Product RNA chaperone
Function unknown
Gene expression levels in SubtiExpress: hfq
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
Expression at a glance   PubMed
Hfq expression.png















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:

Database entries

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

Additional information

Expression and regulation

  • Regulation:
    • repressed by glucose (7.7-fold) PubMed
    • expression (mRNA levels) is quite constant during growth in minimal medium PubMed
    • the Hfq protein amount increases upon transition to stationary phase PubMed
  • Regulatory mechanism:
  • Additional information:

Biological materials

  • Expression vector:
  • GFP fusion:
  • two-hybrid system: B. pertussis adenylate cyclase-based bacterial two hybrid system (BACTH), available in Jörg Stülke's 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