University of Delaware

Other

Michael C Rice

Eric B Kmiec

Howard Gamper

William K Holloman

Pamela A Havre

Li Liu

Sheryl T Smith

Michael G Usher

Zhigang Shu

Methods and compositions for polymorphism detection and separation. The methods are readily multiplexed, can be adapted to a variety of existing detection systems, and permit target amplification without PCR. The methods permit allelic variants selectively to be isolated, with or without contemporaneous detection, and finds particular utility in facilitating the construction of coisogenic cell collections in which the cells differ genotypically by single nucleotide changes targeted to defined loci.

Polymorphism detection and separation

Presented are methods and compositions for targeted chromosomal genomic alterations using modified single-stranded oligonucleotides. The oligonucleotides of the invention have at least one modified nuclease-resistant terminal region comprising phosphorothioate linkages, LNA analogs or 2'-O-Me base analogs.

Targeted chromosomal genomic alterations with modified single stranded oligonucleotides

Methods for the production and use of stable complexes of duplex nucleic acid molecules and oligonucleotides are presented. These complexes can be used for the detection and purification of a known nucleic acid target as well as the manipulation of a defined nucleic acid target sequence.

Genomics applications for modified OLIGO nucleotides

Presented are methods and compositions for targeted chromosomal genomic alterations using modified single-stranded oligonucleotides of the invention have at least one modified nuclease-resistant terminal region comprising phosphorothioate linkages, LNA analogs or 2'-O-Me base analogs.

Composition and methods for enhancing oligonucleotide-directed nucleic acid sequence alteration in vivo, ex vivo and in vitro are presented. These methods and compositions involve cells and cell-free extracts with altered levels or activities of a protein from the RAD52 epistasis group, the mismatch repair group and/or the excision repair group.

Compositions and methods for enhancing oligonucleotide-mediated gene alteration

The invention concerns mammalian recombinase genes (REC2) and their promoters. Over expression of REC2 in a cell is found to facilitate homologous recombination, particularly homologous recombination using a DNA/RNA chimeric oligonucleotide and to sensitize a cell to the apoptotic effects of irradiation. The REC2 promoter, in combination with a strong enhancer, e.g., a SV40 enhancer, was found to be a strong promoter following irradiation of the cells. A radiation induceable promoter can be used to sensitize a cell to radiation treatment by operably linking the radiation induceable promoter to a gene whose expression converts a prodrug to a drug such as a herpes thymidien kinase gene.

Mammalian and human REC2

The invention includes a method of phosphorylating a serine containing substrate by incubating the substrate with ATP and an enzyme that is hsRec2 or muRec2 or a derivative thereof. The natural substrates of the kinase activity of Rec2 are the cell cycle control proteins such as p53 and cyclin E. The over expression of Rec2 is known to cause cell-cycle arrest and apoptosis and the invention discloses that these effects are kinase mediated. Accordingly, the invention provides a method of assessing antagonists and agonists of Rec2, which antagonists and agonists would have pharmacological activity. The invention further discloses that there is specific binding between hsRec2 and at least three cell cycle control proteins: p53, PCNA and cdc2.

Growing community of inventors

Newtown, PA, United States of America

Michael C Rice