New i-crei derived single-chain meganuclease and uses thereof

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 9/22 (2006.01)

Patent

CA 2729124

A new I-CreI derived single-chain meganuclease comprising two domains, each domain comprising a portion of a parent I-CreI monomer which extends at least from the beginning of the first alpha helix to the end of the C-terminal loop and said two domains being joined by a peptidic linker which allows them to fold as a I-CreI dimer that is able to bind and cleave a chimeric DNA target comprising one different half of each parent homodimeric I- CreI meganuclease target sequence. Use of said I-CreI derived single-chain meganuclease for genetic engineering, genome therapy and antiviral therapy.

L'invention concerne une nouvelle méganucléase à chaîne simple dérivée de I-CreI, comprenant deux domaines, chaque domaine comprenant une partie d'un monomère parent de I-CreI qui s'étend au moins du début de la première hélice alpha à la fin de la boucle C-terminale et lesdits deux domaines étant joints par un segment de liaison peptidique qui leur permet de se replier en tant que dimère de I-CreI qui est capable de se lier et de cliver une cible d'ADN chimérique comprenant une moitié différente de chaque séquence cible de méganucléase de I-CreI homodimère parente. L'invention concerne l'utilisation de ladite méganucléase à chaîne simple dérivée de I-CreI pour le génie génétique, la thérapie génique et la thérapie antivirale.

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