FapR

• Description: repressor of fatty acid synthetic genes
  
  

Gene name	fapR
Synonyms	ylpC
Essential	no
Product	transcriptional repressor
Function	regulation of fatty acid biosynthesis
Metabolic function and regulation of this protein in SubtiPathways: Lipid synthesis
MW, pI	21 kDa, 5.393
Gene length, protein length	564 bp, 188 aa
Immediate neighbours	recG, plsX
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: BSU15880

Database entries

• 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

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

• UniProt: O34835

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: fapR-plsX-fabD-fabG-acpA 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:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: