Regulatory

Part:BBa_K2728001

Designed by: Zhenhao Yan   Group: iGEM18_BGIC-Global   (2018-10-09)
Revision as of 15:25, 13 October 2018 by Bluepumpkin (Talk | contribs)


pfrmR - An Engineered Formaldehyde-Inducible Promoter

Basic Description

This promoter is an engineered formaldehyde-inducible promoter. Escherichia coli has a native formaldehyde-inducible promoter, pfrm, which is found upstream of the frmRAB formaldehyde detoxification operon. FrmR, the first product of the operon, is a member of the DUF156 family of DNA-binding transcriptional regulators. It binds the frmRAB promoter region and is negatively allosterically modulated by formaldehyde. FrmR is specific to formaldehyde, responding to acetaldehyde, methylglyoxal, and glyoxal to far lesser degrees and not at all to a range of other aldehydes and alcohols tested. The genes frmA and frmB encode a formaldehyde dehydrogenase and S-formylglutathione hydrolase, respectively, and are responsible for detoxifying formaldehyde to formic acid in a glutathione-dependent pathway. The negative-feedback regulation of the frmRAB operon is similar to that of many other prokaryotic operons, whereby the transcription factor represses its own transcription.


Fig 1: Without Formaldehyde


caption

Fig 2: With Formaldehyde


Features

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]


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Categories
Parameters
None