A method for increasing the processivity of a dna- or...

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 9/12 (2006.01) C07K 14/15 (2006.01) C12N 15/10 (2006.01)

Patent

CA 2365263

The present invention relates to genetic engineering, and especially to cDNA synthesis and cDNA cloning. More specifically, a method is presented for increasing the processivity of a DNA- or RNA-dependent RNA- or DNA-polymerase comprising an addition of a general nucleic acid binding protein. In particular, the present invention relates to methods for increasing the processivity of reverse transcriptase (RT) E. coli DNA polymerase and T7 DNA polymerase using a nucleic acid binding protein such as Ncp7, recA, SSB and T4gp32. The invention further relates to assays to identify and select agents capable of increasing the processivity of a DNA or RNA-dependent polymerase, such as MMTV RT, AMV RT, T7 DNA polymerase and E. coli DNA polymerase. In a particularly preferred embodiment, the invention relates to a method for increasing the generation of full-length cDNA clones using a nucleic acid binding protein such as Ncp7, recA, SSB and T4gp32.

L'invention concerne le génie génétique et plus spécialement la synthèse et le clonage d'ADNc. L'invention concerne plus particulièrement une technique permettant d'accroître l'aptitude au traitement de l'ADN polymérase ou de l'ARN polymérase ADN ou ARN dépendante, qui consiste à ajouter une protéine générale de liaison de l'acide nucléique. L'invention concerne en particulier des techniques permettant d'accroître l'aptitude au traitement d'une transcriptase inverse, l'ADN polymérase d'E. coli et l'ADN polymérase de T7, utilisant une protéine de liaison de l'acide nucléique, telle que Ncp7, recA, SSB et T4gp32. L'invention concerne également des dosages immunologiques permettant l'identification et la sélection d'agents capables d'accroître l'aptitude au traitement de la polymérase ADN ou ARN dépendante, telle que MMTV RT, AMV RT, l'ADN polymérase de T7 et l'ADN polymérase d'E. coli. Dans un mode de réalisation préféré, l'invention concerne une technique permettant d'accroître la production de clones d'ADNc longs utilisant une protéine de liaison de l'acide nucléique, telle que Ncp7, recA, SSB et T4gp32.

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