Difference between revisions of "Part:BBa K3239009"

Revision as of 08:01, 16 October 2019

pMIT1-PRM1

PRM1 gene expressed by the pMIT1 promoter.

Usage and Biology

Upon methanol induction, pPRM1 expression of the homogeneous Prm1 is activated, and further amplified via the self-upregulation of Prm1. Prm1 then activates pMIT1, upregulating the expression of the homogeneous Mit1 and the heterogeneous Prm1.

Unlike wildtype P. pastoris GS115 where Prm1 expression is then inhibited by Mit1, in the constructed pGMP1-pAOX1-GFP strain, the heterogeneous Prm1 is constantly self-upregulated due to the upregulation of pMIT1 by Prm1. This leads to an overall upregulation of the expression of pAOX1 transcription factors and hence shall up-regulate pAOX1 activity compared to wildtype P. pastoris.

Given that in constructed strains, pAOX1 not only expresses the yEGFP3 reporter gene, but also the homogenous AOX1 (alcohol oxidase 1) gene, the pAPM1-pAOX1-GFP strain should not only have a higher GFP yield compared to the pAOX1-GFP strain (pAOX1-GFP homologously recombined into wildtype P. pastoris GS115) but also exhibit higher growth rates since it should be more capable of metabolizing methanol.

Figure 1. Illustration of the pGMP1-pAOX1-GFP construct (for in trans regulations among homogenous transcription factors and the homogenous AOX1, see the pAOX1-GFP construct)

Sequence and Features