Difference between revisions of "Part:BBa K3105672"
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Part to co-express horseradish peroxidase (HRP) and aryl-alcohol oxidase (AAO) in <I>Pichia pastoris</I>. The 2A-peptide will facilitate cleavage of the polypeptide during translation, leading to separate units of HRP and AAO. <br>
 
Part to co-express horseradish peroxidase (HRP) and aryl-alcohol oxidase (AAO) in <I>Pichia pastoris</I>. The 2A-peptide will facilitate cleavage of the polypeptide during translation, leading to separate units of HRP and AAO. <br>
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The part was used in <partinfo>BBa_K3105679</partinfo> for successful expression of HRP and AAO. <br>
  
 
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===Results===
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The part was expressed in X-33 <I>P. pastoris</I> cells using the pPICZαB shuttle vector. Cultures were induced with methanol and analysed on SDS-PAGE. HRP and AAO was successfully expressed (Figure 1). Furthermore, also the functionality of the 2A-peptide in <I>P. patoris</I> was shown, because failure in cleavage would lead to a induction band bigger than 100 kDa.
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[[File:T--Uppsala Universitet--HRP-2A-AAO Gel.png|800px|thumb|left|<b>Figure 1: Expression of HRP-2A-AAO</b><br>
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X-33 <I>P. pastoris</I> cells were transformed with pPICZαB_HRP-2A-AAO and expression cultures were induced. Different fractions (pellet (P) and supernatant (S) samples / uninduced (u) and induced (i) cultures) from X-33 HRP-2A-AAO expression culture were analysed on a 10 % SDS-PAGE stained with Coomassie Blue. After 24 h an induction band can be seen at around 55 kDa, which is approximately the calculated molecular weight for both HRP and AAO. This shows that the enzymes are expressed as well as that the cleavage initiated by the 2A-peptide is functional.]]
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Enzyme activity was assessed by conducting different assays. For HRP activity, an ABTS-assay was used and the activity between uninduced and induced samples was compared (Figure 2A). Clear increase
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Revision as of 13:13, 20 October 2019


HRP-2A-AAO

Part to co-express horseradish peroxidase (HRP) and aryl-alcohol oxidase (AAO) in Pichia pastoris. The 2A-peptide will facilitate cleavage of the polypeptide during translation, leading to separate units of HRP and AAO.
The part was used in BBa_K3105679 for successful expression of HRP and AAO.

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal BglII site found at 880
    Illegal BamHI site found at 1275
    Illegal BamHI site found at 1462
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal AgeI site found at 961
    Illegal AgeI site found at 2422
  • 1000
    COMPATIBLE WITH RFC[1000]