Part:BBa_K1976048

Colicin E2 DNase domain "miniColicin"

Colicin E2 is a peptide, that is toxic to coliform bacteria. It is one of a group of proteins of this type, it being a nicking endonuclease. It has a corresponding activity inhibiting protein called immunity protein Im2, which is also in the registry under the name BBa_K1976027.

Figure 1:Structure of Colicin E2 DNase domain derived from a molecular dynamics simulation.

Usage

The Colicin E2 immunity protein (BBa_K1976027 and BBa_K1976028) can be used in combination with the Colicin E2 DNase. Due to to the high binding affinity of the immunity protein to the DNase domain (Kd ∼ 10− 15 M), it can be used to fuse proteins and in combination with a suppression mechanism for the immunity protein as a bacterial killswitch.

Characteristics

Molecular Weight	15.2 kDa
Residues	133
pI	9.06
[Data taken created in Snapgene and http://isoelectric.ovh.org/calculate.php]

References

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 AgeI site found at 28
  
• 1000
  COMPATIBLE WITH RFC[1000]

[1] Cascales et al, Colicin Biology, Microbiology and Molecular Biology Reviews, vol. 71, pp. 158-229, 2007