Composite

Part:BBa_K3037008

Designed by: Arnau Pérez Roig   Group: iGEM19_TU_Dresden   (2019-10-15)
Revision as of 20:50, 21 October 2019 by ArnauP (Talk | contribs) (→‎Sequence)

MBP+HRP

MBP+HRP
Function Expression
Use in Escherichia coli
RFC standard Freiburg RFC25 standard
Backbone pSB1C3
Experimental Backbone pOCC97
Submitted by Team: TU_Dresden 2019



Overview

The TU Dresden 2019 team design this fusion protein in order to increase the expression of HRP. In order to make it the RFC 25 standard was used (more information).

HRP was inserted into the pSB1C3 vector for transformation and expressed with pOCC97 (BBa_K3037000) in Escherichia coli.

The HRP was made from BBa_K1800002 but adapted to the Freiburg RFC25 standard

Biology

The metalloenzyme horse radish peroxide is widely used in many biochemical and immunological applications. This Enzyme on its own does not give any visual read out but however upon addition of suitable substrate, HRP oxidizes this substrate and yields a colour change and this can be spectrophotometrically analysed. One such common example for chromogenic substrate is TMB (3,3',5,5'-Tetramethylbenzidine) that HRP oxidizes. Added advantage of using HRP includes its stability and small size, hence reducing the interference during conjugation reactions such as for secondary antibody detection and moreover it is economical in comparison with other alternative enzymes like the alkaline phosphatase.

MBP is a well-established, reliable protein-tag that is meant to increase the solubility of the proteins it is fused to. Therefore it limits the risk of accumulation of overexpressed recombinant protein in inclusion bodies and increases the total protein yield. It can also improve expression of difficult enzymes like Cas9. It can further be used to purify proteins via affinity chromatography in amylose resin.[1]

You can find more information in the pages of the individual parts of this composite: BBa_K3037007 BBa_K3037001

Characterization

Outline

1) Expression in pOCC97, growing curve (BBa_3037000)

2) Expression in pOCC97, SDS-PAGE (BBa_3037000)

Experiments in Detail

1) Expression in pOCC97, growing curve (BBa_3037000)

  • Growing curve (Check that the growing curve of the bacteria is not affected by the expression of the protein)

2) Expression in pOCC97, SDS-PAGE (BBa_3037000)

  • SDS-PAGE (Comparison of expression of different proteins in the vector before and after optimization)

Sequence

NOTE: Please be aware, that by combining all the basic parts used for this composite part, the registry automatically inserted a RFC23 scar. However, the design and our cloning strategy is based on RFC25.


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal NheI site found at 1357
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal BglII site found at 381
    Illegal BglII site found at 1599
    Illegal XhoI site found at 1683
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    INCOMPATIBLE WITH RFC[1000]
    Illegal BsaI site found at 79

Reference

[1] https://www.genscript.com/bacterial-soluble-protein-expression-MBP-tag.html


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