FapR

• Description: repressor of fatty acid synthetic genes
  
  

Gene name	fapR
Synonyms	ylpC
Essential	no
Product	transcriptional repressor
Function	regulation of fatty acid biosynthesis
Gene expression levels in SubtiExpress: fapR
Interactions involving this protein in SubtInteract: FapR
Metabolic function and regulation of this protein in SubtiPathways: fapR
MW, pI	21 kDa, 5.393
Gene length, protein length	564 bp, 188 aa
Immediate neighbours	recG, plsX
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

biosynthesis of lipids, transcription factors and their control

This gene is a member of the following regulons

ComA regulon, FapR regulon

The gene

Basic information

• Locus tag: BSU15880

Database entries

• BsubCyc: BSU15880

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: FapR regulates the expression of at least 10 genes (the fap regulon). It autoregulates its own expression. Malonyl-CoA, a precursor of fatty acid biosynthesis, binds to FapR changing its conformation to a non-DNA binding state. Hence, conditions that cause malonyl-CoA accumulation, like fatty acid biosynthesis inhibition, derepress the fap regulon.

• Protein family: fapR family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity: malonyl-CoA and malonyl-ACP act as the molecular inducer of the FapR regulon PubMed

• Interactions:
  • malonyl-ACP-FapR PubMed

• Localization:

Database entries

• BsubCyc: BSU15880

• Structure: 2F3X (complex with effector), 2F41

• UniProt: O34835

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: fapR-plsX-fabD-fabG-acpA PubMed

• Expression browser: fapR PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • repressed in the absence of malonyl-CoA or malonyl-ACP (FapR) PubMed
  • expressed at high cell density (ComA) PubMed

• Regulatory mechanism:
  • ComA: transcription activation (ComA) PubMed
  • FapR: transcription repression PubMed

• Additional information:
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 85 PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium, exponential phase): 490 PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium, early stationary phase after glucose exhaustion): 412 PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium, late stationary phase after glucose exhaustion): 729 PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Reviews

Yasutaro Fujita, Hiroshi Matsuoka, Kazutake Hirooka
Regulation of fatty acid metabolism in bacteria.
Mol Microbiol: 2007, 66(4);829-39
[PubMed:17919287] [WorldCat.org] [DOI] (P p)

Other original publications

Additional publications: PubMed