Part:BBa_K2933132

His+Linker a+Sumo+Linker b+SHD

This part encodes the fusion protein of His tag, sumo tag and SHD to promote the expression and purification of target protein(SHD).

Sequence and Features

Assembly Compatibility:

• 10
  INCOMPATIBLE WITH RFC[10]

  Illegal EcoRI site found at 256
  
• 12
  INCOMPATIBLE WITH RFC[12]

  Illegal EcoRI site found at 256
  Illegal NheI site found at 33
  
• 21
  INCOMPATIBLE WITH RFC[21]

  Illegal EcoRI site found at 256
  Illegal BglII site found at 145
  Illegal BamHI site found at 344
  
• 23
  INCOMPATIBLE WITH RFC[23]

  Illegal EcoRI site found at 256
  
• 25
  INCOMPATIBLE WITH RFC[25]

  Illegal EcoRI site found at 256
  
• 1000
  COMPATIBLE WITH RFC[1000]

Usage and Biology

This composite part is made up with five basic parts, the His tag, the Sumo tag, three cutting sites(NdeI, NheI and BamHI) and our target protein SHD. It encodes a protein which is SHD fused with His-Sumo tag. The fusion protein is about 41.0kD. In order to gain the highly purified target protein, we add His-Sumo tag in N-terminal of SHD and combine the three parts with these three cutting sites. The fusion protein can be cut off at the cutting site BamHI. It is convenient for us to purify our target protein.

Molecular cloning

First, we used the vector pET28b-sumo to construct our expression plasmid. And then we converted the plasmid constructed to E. coli DH5α to expand the plasmid largely.

Figure 1. Left: The PCR result of SHD. Right: The verification results by enzyme digestion.

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