Part:BBa_K1132009
PhiC31 integrase
Isolated from the bacteriophage PhiC31, the PhiC31 integrase (frequently also written as: ΦC31 integrase) encodes a serine-type recombinase that mediates the sequence-specific recombination between two different attachment sites, called attB and attP, which share a 3 bp central region, where the crossover occurs (Thorpe et al., 2000). Because the two sites recognized by the PhiC31 integrase differ and the recombination event leads to two different sites (attR and attL), PhiC31 based switch is unidirectional and definitive, except if the required excisionase factor is present. Recombination occurs irrespective of whether the substrate is supercoiled or linear, and does not require anything more than the integrase and attB, attP sites . (HELENA M. THORPE AND MARGARET C. M. SMITH, In vitro site-specific integration of bacteriophage DNA catalyzed by a recombinase of the resolvaseyinvertase family, 1998).
The recombination sites can be designed differently (position – orientation) in order to obtain a DNA 180° inversion or an integration of the desired DNA sequence. The 180° switch permits to design a lot of regulation tools, such as logical gates that can be found here (https://parts.igem.org/Part:BBa_K1132003, https://parts.igem.org/Part:BBa_K1132004).
attB + attP + integrase → attR + attL + integrase
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000INCOMPATIBLE WITH RFC[1000]Illegal SapI site found at 1689
Illegal SapI.rc site found at 1380
Illegal SapI.rc site found at 1438
Illegal SapI.rc site found at 1543
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