Methods for in vivo diversification of single genes

Details Methods for in vivo diversification of single genes Methods for in vivo diversification of single genes

2008-01-29

2008-01-29

Guzo, David (Department: 1636)

Chemistry: molecular biology and microbiology

Measuring or testing process involving enzymes or...

Involving nucleic acid

C435S007200, C435S007310, C435S252300, C536S023100

Reexamination Certificate

active

07323299

ABSTRACT:
Methods and compositions are provided for the efficient in vivo diversification of gene-products in filamentous fungi, starting from (but not limited to) two or more copies of a single gene constituent. The diversification involve use of the Repeat-Induced Point mutation (RIP) process inN. crassa, and other fungi that have analogous mutational processes. The invention takes advantage of the induction of G:C to A:T transition mutations specific to duplicated DNA sequences during the premeiotic dikaryon phase of the life cycle of the fungus. The methods and compositions of the invention can be utilized to generate diversity in target genes, and are proposed for the purpose of altering and generating novel forms and activities of gene-products thus encoded. Duplicated genes may be introduced into the organism and are present either in tandem, or at separate ectopic locations within the genome of the fungus. After crossing the resulting transformant(s), sexual progeny can then be selected which contain the mutated gene, and subsequently screened for a desired product.

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