Part:BBa_K1582025

Thc_Cut1+sJanus-m Fusion Protein

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  COMPATIBLE WITH RFC[21]
• 23
  COMPATIBLE WITH RFC[23]
• 25
  INCOMPATIBLE WITH RFC[25]

  Illegal NgoMIV site found at 1048
  
• 1000
  INCOMPATIBLE WITH RFC[1000]

  Illegal SapI site found at 1057
  

Protein Expression

Protein pre-expression experimental conditions:
1.Transferred our correct plasmid into escherichia coli BL21 (DE3).
2.Select bacterial colony and add into LB, incubate at 37 centigrade for 7h. Add 4μl of IPTG to induce the expression of protein.
3.Incubate at 37 centigrade for 4h. The bacterial solution’s OD is 0.6-0.8.

Figure 1. The result of protein Thc_Cut1-sJanus-m pre-expression. Labels are the same as before.

Finally, the protein was expressed successfully.
We added 5μl of the bacterial restored into the LB containing 5μl of ampicillin to the final concentration of 1mM. And then, we incubated them in the shaker at the temperature of 37 centigrade, working for 14-16 hours.

Experimental conditions as follow：
1. Incubate at 37 centigrade, until OD ranges from 0.6-0.8(4-5h).
2. Incubate at 4 centigrade, 220rpm, for 30mins.
3. Add 1mL IPTG to the final concentration of 1mM.
4. Incubate at 16 centigrade for 12-16h.

The purification of protein:
We used eppendorf to make bacterial deposited, working at 4000rpm for 20min. Use 15mL MCAC0 to suspend bacterial. After resuspending, we used high pressure to break the cells.
In order to get the recombinant protein with the higher purity, the recombinant protein was purified through Ni-chelating affinity chromatography.

The results are as follow:

Figure 1. The result of protein Thc_Cut1-sJanus-m expression. 1: Sample non-induced; 2: Sample induced; 3: Sample of cytoplasm deposited; 4: Sample which outflowed from Ni column combined with supernatant; 5: Sample of NIi medium combined with supernatant; 6: Sample washed by MCAC20; 7: Sample resuspended by MCAC30; 8: Sample washed by MCAC30; 9: Sample resuspended by MCAC50; 10: Sample washed by MCAC50; 11: Sample resuspended by MCAC100; 12: Sample washed by MCAC100; 13: Sample resuspended by MCAC200; 14: Sample washed by MCAC200; 15: Sample resuspended by MCAC500; 16: Sample washed by MCAC500; 17: Sample resuspended by MCAC1000