Leland Stanford Junior University

Brandeis University

Robert P St Onge

Ronald W Davis

Ulrich Schlecht

Joseph L Horecka

Sasha F Levy

Lars Steinmetz

Kevin Roy

James E Haber

Justin D Smith

The present disclosure relates to multiplex production and phenotyping of genetically engineered cells using RNA-guided nucleases and genomic barcoding. In particular, high-throughput multiplex genome editing is achieved utilizing a system that facilitates precise genome editing at desired target chromosomal loci by homology directed repair. Integration of guide RNA and donor DNA sequences as a genomic barcode at a separate chromosomal locus allows identification, isolation, and massively-parallel validation of individual variants from a pool of transformants. Strains can be arrayed according to their precise genetic modifications, as specified by donor DNA incorporation in heterologous or native genes. The present disclosure further relates to a method of editing codons outside of canonical guide RNA recognition regions, which enables complete saturation mutagenesis of protein-coding genes, a marker-based internal cloning method, which removes background due to oligonucleotide synthesis errors and incomplete vector backbone cleavage, and a method of enhancing homology directed repair by active donor recruitment.

Multiplex production and barcoding of genetically engineered cells

A novel method for preparing sequence-verified oligonucleotides is disclosed. In particular, the invention relates to a simple, affordable, and scalable method that combines high-throughput mating of yeast clones, a unique selectable system for combining DNA sequences in yeast, and next-generation sequencing. This method allows sequence-verified oligonucleotides to be readily isolated from complex libraries.

Scalable method for isolation and sequence-verification of oligonucleotides from complex libraries

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Palo Alto, CA, United States of America

Robert P St Onge