Difference between revisions of "Part:BBa K2933204"
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   [[File:SPG-PCR1.png]]<br>
 
   [[File:SPG-PCR1.png]]<br>
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'''Figure 1.'''  a: The PCR result of SPG. b: The verification results by enzyme digestion.<br>
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'''Figure 1.'''  a: The PCR result of SPG. <br>
 
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After verification, it was determined that the construction is successful. We converted the plasmid to ''E. coli'' BL21(DE3) for expression and purification.<br>
 
After verification, it was determined that the construction is successful. We converted the plasmid to ''E. coli'' BL21(DE3) for expression and purification.<br>

Revision as of 12:12, 23 September 2019


T7 promoter+RBS b+Linker h+His+Linker f+SPG-1+T7 terminator

This part consists of T7 promoter, RBS and protein coding sequence（His+Linker f+SPG-1），and the biological module can be built into E.coli for protein expression

Sequence and Features


Assembly Compatibility:
  • 10
    INCOMPATIBLE WITH RFC[10]
    Illegal XbaI site found at 47
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal NheI site found at 169
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    INCOMPATIBLE WITH RFC[23]
    Illegal XbaI site found at 47
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal XbaI site found at 47
  • 1000
    COMPATIBLE WITH RFC[1000]


Usage and Biology=

This composite part is made up with three basic parts, the His tag, T7 promoter, RBS and our target protein SPG-1. It encodes a protein which is SPG-1 fused with His tag. The fusion protein is about 30.2 kD. In order to gain the highly purified target protein, we add His tag in N-terminal of SPG-1. It is convenient for us to purify our target protein.

Molecular cloning

First, we used the vector pGEX-6p-1 to construct our expression plasmid. And then we converted the plasmid constructed to E. coli DH5α to expand the plasmid largely.

SPG-PCR1.png
Figure 1. a: The PCR result of SPG.

After verification, it was determined that the construction is successful. We converted the plasmid to E. coli BL21(DE3) for expression and purification.

Expression and purification

Pre-expression:
The bacteria were cultured in 5mL LB liquid medium with ampicillin(100 μg/mL final concentration) in 37℃ overnight.