Methods for transforming and expression screening of...

C - Chemistry – Metallurgy – 12 – P

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C12P 21/06 (2006.01)

Patent

CA 2565888

The present invention relates to methods for expression screening of filamentous fungal transformants, comprising: (a) isolating single colony transformants of a DNA library introduced into E. coli; (b) preparing DNA from each of the single colony E. coli transformants; (c) introducing a sample of each of the DNA preparations of step (b) into separate suspensions of protoplasts of a filamentous fungus to obtain transformants thereof, wherein each transformant contains one or more copies of an individual polynucleotide from the DNA library; (d) growing the individual filamentous fungal transformants of step (c) on selective growth medium, thereby permitting growth of the filamentous fungal transformants, while suppressing growth of untransformed filamentous fungi; and (e) measuring activity or a property of each polypeptide encoded by the individual polynucleotides.

L'invention concerne des méthodes permettant de cribler l'expression de transformants de champignons filamenteux consistant : (a) à isoler les transformants d'une colonie unique d'une bibliothèque d'ADN introduite dans E. coli ; (b) à préparer l'ADN de chaque transformant de E. coli de la colonie unique ; (c) à introduire un échantillon de chaque préparation d'ADN de l'étape (b) dans des suspensions séparées des protoplastes d'un champignon filamenteux afin d'obtenir ses transformants, chaque transformant contenant une ou plusieurs copies d'un polynucléotide individuel de la bibliothèque d'ADN ; (d) à faire pousser les transformants individuels de champignons filamenteux de l'étape (c) sur un milieu de croissance sélectif, de façon que les transformants de champignons filamenteux puissent pousser, tout en supprimant la croissance des champignons filamenteux non transformés ; et (e) à mesurer l'activité ou une propriété de chaque polypeptide codé par les polynucléotides individuels.

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