University of Delaware

Other

Thomas Jefferson University

Tecan Trading Ag

Valigen (us), Inc.

Anima Biotech Inc.

Howard Gamper

Eric B Kmiec

Michael C Rice

Marc Nathan Feiglin

Nigel L Webb

Joseph Mamone

Allyson D Cole-Strauss

Iris Alroy

Ya-Ming Hou

Michael G Usher

Marc N Feiglin

The present invention provides functional aptamer-comprising tRNA molecules, useful in the study of tRNA and ribosomal activity.

Functional tRNA-aptamer molecules

The invention relates to an isolated nuclion having (i) a core nucleic acid, and (ii) one or more ribocapsids each including a polymer of two or more ribocapsid subunits, wherein said ribocapsid subunits include nucleic acid. The invention also relates to a method for manufacturing an isolated nuclion.

Nuclions and ribocapsids

In a method of deducing the number of repeat units in a selected short tandem repeat (STR) in a genomic sample, at least a single stranded target DNA generated from a genomic sample comprising a selected STR, an STR probe (P1,P1'), a reference probe (P2), and two blockers (B1,B2) are provided, and at least three differential hybridization experiments are carried out, based on which the number of STR probe oligonucleotides (P1,P1&#x2032;) bound per target DNA strand in each differential hybridization experiment is determined. The method further comprises the step of comparing these numbers of STR probe oligonucleotides (P1,P1&#x2032;) bound per target DNA strand in the differential hybridization experiments for deducing the number of repeat units in the selected STR on the single stranded target DNA strand. Also disclosed are kits for carrying out STR genotyping by differential hybridization.

STR genotyping by differential hybridization

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.

The invention is based on the reaction of recombinagenic oligonucleotides in a cell-free system containing a cytoplasmic cell extract and a test duplex DNA on a plasmid. The reaction specifically converts a mutant kan gene to recover the resistant phenotype in transformed MutS, RecA deficient bacteria and allows for the rapid and quantitative comparison of recombinagenic oligonucleobases. Using this system a type of Duplex Mutational Vector termed a Heteroduplex Mutational Vector, was shown to be more active in than the types of mutational vectors heretofore tested. Further improvements in activity were obtained by replacement of a tetrathymidine linker by a nuclease resistant oligonucleotide, such as tetra-2&prime;-O-methyl-uridine, to link the two strands of the Duplex Mutational Vector and removal of the DNA-containing intervening segment. The claims concern Duplex Mutational Vectors that contain the above improvements. In an alternative embodiment the claims concern a reaction mixture containing a recombinagenic oligonucleobase, a cell-free enzyme mixture and a duplex DNA containing a target sequence. In yet an alternative embodiment, the invention concerns the use of such mixture to test improvements in recombinagenic oligonucleobases, as well as to test the effects of compounds on the activity of the cell-free enzyme mixture and also to make specific changes in the target DNA sequence.

Growing community of inventors

Philadelphia, PA, United States of America

Howard Gamper