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Standard Name


Gene Synonym(s)

ECK3965, b3973, JW3941, bioR, dhbB[1], dhbB

Product Desc.

Bifunctional biotin protein ligase, biotin operon repressor; biotin-[acetyl-CoA carboxylase] holoenzyme synthase; monomeric[2]

Product Synonyms(s)

bifunctional biotin-[acetylCoA carboxylase] holoenzyme synthetase and DNA-binding transcriptional repressor, bio-5'-AMP-binding[1], B3973[3][1], BirA[3][1], BioR[3][1], DhbB[3][1], biotin-[acetylCoA carboxylase] holoenzyme synthetase and biotin operon repressor[3][1], biotin ligase[3][1], BirA transcriptional repressor[3][1] , bioR, dhbB, ECK3965, JW3941, b3973

Function from GO

Biological Process

Cellular Component

Molecular Function

Knock-Out Phenotype

transcription unit(s): murB[3]

Quick Links

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Biotinyl-5'-AMP is the co-repressor and is also synthesized by BirA (Cronan, 1988). BirA biotinylates AccB on K122. The biotin operon is regulated by the rate of protein biotination (Cronan, 1989).[2]


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  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Riley, M. et al. (2006) Nucleic Acids Res 34:1-6 (corrected supplemental data from B. Wanner)
  2. 2.0 2.1 EcoGene: Rudd, KE (2000) EcoGene: a genome sequence database for Escherichia coli K-12. Nucleic Acids Res 28:60-4.
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 EcoCyc (release 10.6; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7