Panb1-α factor-FMO-AOX1 Terminator
Sequence and Features
- 10COMPATIBLE WITH RFC
- 12COMPATIBLE WITH RFC
- 21Illegal XhoI site found at 124
Illegal XhoI site found at 649
- 23COMPATIBLE WITH RFC
- 25Illegal NgoMIV site found at 706
Illegal AgeI site found at 1925
- 1000Illegal BsaI site found at 1928
This is a composite part for extracellular expression of flavin-containing monooxygenase. FMO is expressed and participates in the production from indole to indigo.Panb1 is a constitutive promoter in yeast, which is expressed under anaerobic conditions, while under aerobic conditions, Panb1, as a repression target of ROX1, is inhibited. When Panb1 initiates the expression, the signal peptide, α-factor, is used to express FMO outside of the cell.
Usage and Biology
FMO is a kind of monooxygenase, which could produce C4a peroxyflavin intermediate, which is highly stable due to spectrum observation and could remain unchanged under 4℃ for minutes, even hours. In the first cycle, NADPH reduces FAD into FADH2. This reduced flavin could react with oxygen rapidly and become peroxyflavin, which is the main form of FMO and further react wih an appropriate nucleophilic substrate. This reaction will form one molecular of water and transfer one oxygen atom to the substrate. The release of NADP+ may be the rate-limiting step of catalytic cycle while the Vmax of substrate binding has little impact on both reactions.