Part:BBa_K4361312

BlcR L66I

A mutant of the BlcR protein, created through site-directed mutagenesis with primers R3 (Part:BBa_K4361218) and F3.3 L66I (Part:BBa_K4361221). For this mutant, the leucine in position 66 has been changed to isoleucine by mutating the CTC codon to ATT.

This mutant also contains the following nucleotide mutations outside of the targeted site:

• C 106 > T, silent mutation
• G 571 > T, resulting in substitution G191C
• G 614 > T, resulting in substitution R205L
• C 687 > T, silent mutation
• T 825 > A, resulting in substitution D275E

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  INCOMPATIBLE WITH RFC[12]

  Illegal NheI site found at 694
  
• 21
  COMPATIBLE WITH RFC[21]
• 23
  COMPATIBLE WITH RFC[23]
• 25
  INCOMPATIBLE WITH RFC[25]

  Illegal NgoMIV site found at 78
  
• 1000
  INCOMPATIBLE WITH RFC[1000]

  Illegal SapI.rc site found at 589
  

Usage and Biology

The set of BlcR mutants (Part:BBa_K4361300 through Part:BBa_K4361319) were expressed in a PURE system in the presence of GreenLys (fluorescent Cy2-labeled lysine). Samples were then run on an SDS PAGE gel (Figure 1.) to determine whether or not the protein was produced. For this mutant (lane 13), a protein band corresponding to the BlcR monomer is visible. Concluding that the production in an E. coli cell-free system was successful for this mutant.

Figure 1. SDS PAGE showing the translation products of 20 different plasmids coding for BlcR mutants. PURE reaction solution was supplemented with GreenLys and the synthesized proteins were imaged with Typhoon using a 488-nm laser. C: negative control with no plasmid. WT: positive control with expressed wildtype BlcR. 13: L66I mutant.