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Gene Review

malT  -  transcriptional regulator MalT

Escherichia coli UTI89

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Disease relevance of malT

  • Structure of two divergent promoters located in front of the gene encoding pullulanase in Klebsiella pneumoniae and positively regulated by the malT product [1].
  • When its structural gene, pulA, is introduced into Escherichia coli, it is controlled by malT, the positive regulator gene of the maltose regulon [1].

High impact information on malT

  • Secretion genes located 5' to pulA were transcribed in the opposite orientation to pulA under the control of the previously identified, malT-regulated malX promoter [2].
  • The mlc gene encodes a transcriptional regulator that has been shown to affect the expression of manXYZ and malT. ptsG mRNA levels are lower in the mlc strain grown on glucose than in the same strain grown on glycerol [3].
  • With glycerol as the carbon source, transcription of malT, encoding the transcriptional activator of the maltose regulon, is weaker in acidic medium than in alkaline medium. malT transcription became high, regardless of the pHo, when glycerol-3-phosphate or succinate was used as the carbon source [4].
  • The increase in malT transcription, associated with the pHo, requires the presence of glycerol in the growth medium and the expression of the glycerol kinase (GlpK) [4].

Associations of malT with chemical compounds

  • Conversely, malT expression was low, regardless of the pHo, when maltose was used as the carbon source [4].


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