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Control of ϕC31 integrase-mediated site-specific recombination by protein trans-splicing.

Olorunniji, FJ, Lawson-Williams, M, McPherson, AL, Paget, JE, Stark, WM and Rosser, SJ (2019) Control of ϕC31 integrase-mediated site-specific recombination by protein trans-splicing. Nucleic Acids Research, 47 (21). pp. 11452-11460. ISSN 0305-1048

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Serine integrases are emerging as core tools in synthetic biology and have applications in biotechnology and genome engineering. We have designed a split-intein serine integrase-based system with potential for regulation of site-specific recombination events at the protein level in vivo. The ϕC31 integrase was split into two extein domains, and intein sequences (Npu DnaEN and Ssp DnaEC) were attached to the two termini to be fused. Expression of these two components followed by post-translational protein trans-splicing in Escherichia coli generated a fully functional ϕC31 integrase. We showed that protein splicing is necessary for recombination activity; deletion of intein domains or mutation of key intein residues inactivated recombination. We used an invertible promoter reporter system to demonstrate a potential application of the split intein-regulated site-specific recombination system in building reversible genetic switches. We used the same split inteins to control the reconstitution of a split Integrase-Recombination Directionality Factor fusion (Integrase-RDF) that efficiently catalysed the reverse attR x attL recombination. This demonstrates the potential for split-intein regulation of the forward and reverse reactions using the integrase and the integrase-RDF fusion, respectively. The split-intein integrase is a potentially versatile, regulatable component for building synthetic genetic circuits and devices.

Item Type: Article
Uncontrolled Keywords: 05 Environmental Sciences, 06 Biological Sciences, 08 Information and Computing Sciences
Subjects: Q Science > QH Natural history > QH301 Biology
Q Science > QH Natural history > QH426 Genetics
R Medicine > RS Pharmacy and materia medica
Divisions: Pharmacy & Biomolecular Sciences
Publisher: Oxford University Press (OUP)
Related URLs:
Date Deposited: 21 Nov 2019 11:25
Last Modified: 04 Sep 2021 08:24
DOI or ID number: 10.1093/nar/gkz936
URI: https://researchonline.ljmu.ac.uk/id/eprint/11790
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