Part:BBa_K3753002

PAAS-Rosa

Rosa hybrid phenylacetaldehyde synthase (PAAS) is capable of transforming L-phenylalanine (L-phe) into phenylacetaldehyde by oxidative decarboxylation. Subsequently, phenylacetaldehyde can be reducted into phenylethanol ,which possesses elegant, fascinating and long-lasting fragrance.

Characterization

Fig.1 The growth curve of recombinant strains.

The figure above shows the changes of biomass concentration in WT, BY4741-pRS426-Petunia, BY4741-pRS426-Vanda, BY4741-pRS426-Rosa yeast over time. The OD₆₀₀ of different strain cultures is measured at the designated time points (0h, 24h,48h,72h). The result shows that the growth trend of the recombinant strain is basically the same as the wild-type strain, indicating that the introduction of heterogeneous gene has no significant effect on the growth of yeast.

Fig.2 The 2-PE production of the recombinant strains.
After 72 hours of fermentation, 2-PE production of the wild-type of BY4741, pRS426-Petunia, pRS426-Vanda and pRS426-Rosa was tested by HPLC. Data represent means of triplicate culture±standard error.

Saccharomyces cerevisiae BY4741 contains Ehrlich pathway and other metabolic pathways to operate simultaneously to produce 2-PE, so the wild-type of BY4741 has a certain amount of 2-PE production (1.205g/L). After the introduction of heterogeneous paas gene, the 2-PE production has remarkablely increased. Among them, the production of 2-PE produced by the yeast strain which was introduced petunia-paas BBa_K3753000 increased the most(1.570g/L), followed by the strain which was introduced vanda-paas (1.514g/L) BBa_K3753001 and rosa-paas (1.341g/L).

Sequence and Features

Assembly Compatibility:

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

  Illegal NheI site found at 313
  
• 21
  COMPATIBLE WITH RFC[21]
• 23
  COMPATIBLE WITH RFC[23]
• 25
  COMPATIBLE WITH RFC[25]
• 1000
  COMPATIBLE WITH RFC[1000]