Part:BBa_K1523101

PyeaR->Riboflavin synthase

It can sense p-nitrophenol by Pyear.When PNP exits,it can produce electry in MFC.

Abstract

Microbial Fuel Cells (MFCs) which can convert contaminants in wastewaters into energy is an ideal approach to solve both pollution problem and energy crisis. However, MFCs is hard to determine the contaminants concentrations which is a major drawback for MFCs applications. We found that the electricity produced by MFCs was somewhat related to the substrates concentrations such as P-nitrophenol (PNP) in anode or Chromium (VI) in cathode. Then a novel MFC system was designed. For anode strain, we’ve cloned a PNP sensor sequence and a riboflavin into Escherichia coli. The recombinants is able to detect PNP and produce riboflavin to boost electrical generation when co-cultured with Shewanella oneidensis.

Pathway

We designed this pathway for our purpose. As you can see, the NsrR is constitutive expressed in almost all E. coli orgnisms and it can repress the promoter PyeaR. In our project we found that this sensitive system is also adjusted to the PNP(p-nitrophenol). So we constructed this sensor pathway.

The sensor will cause the expression of riboflavin, a kind of mediator which can induce the generation of current in MFCs, to show the appearance of PNP. We can estimate the concentration of PNP.

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  INCOMPATIBLE WITH RFC[21]

  Illegal XhoI site found at 1243
  
• 23
  COMPATIBLE WITH RFC[23]
• 25
  COMPATIBLE WITH RFC[25]
• 1000
  COMPATIBLE WITH RFC[1000]