Element Biosciences, Inc.

Virginia Saade

Matthew William Kellinger

Tyler Lopez

Mark Ambroso

Michael Klein

Jendrik Hentschel

Michael Previte

Molly Min He

Sinan Arslan

Junhua Zhao

Samantha Snow

William Light

Hua Yu

Yu-Hsien Hwang-Fu

Michael Kim

Marco Tjioe

Andrew Boddicker

Jendrik Boothby-Hentschel

Provided herein are engineered variants of archaeal, prokaryotic, and eukaryotic polymerases that exhibit enhanced thermostability, enhanced incorporation of 3' modified nucleotides, and improved uracil-tolerance, in polymerase-catalyzed nucleotide extension reactions relative to wild type polymerase enzymes. Also provided are uses of the engineered polymerases for forming complexed polymerases, forming binding complexes and forming ternary complexes, and uses for conducting nucleic acid sequencing reactions.

Engineered polymerases

Provided herein are engineered variants of archaeal polymerases that exhibit exonuclease-minus activity, enhanced thermostability, enhanced incorporation of 3' modified nucleotides, improved uracil-tolerance and/or reduce sequence-specific errors in polymerase-catalyzed nucleotide binding and extension reactions relative to wild type polymerase enzymes. Also provided are uses of the engineered polymerases for forming complexed polymerases and forming binding complexes, and uses for conducting nucleic acid sequencing reactions.

Engineered polymerases with reduced sequence-specific errors

The present disclosure provides compositions and methods that employ the compositions for conducting pairwise sequencing and for generating concatemer template molecules for pairwise sequencing. The concatemers can be generated using a rolling circle amplification reaction which is conducted either on-support, or conducted in-solution and then distributed onto a support. The rolling circle amplification reaction generates concatemers containing tandem copies of a sequence of interest and at least one universal adaptor sequence. An increase in the number of tandem copies in a given concatemer increases the number of sites along the concatemer for hybridizing to multiple sequencing primers which serve as multiple initiation sites for polymerase-catalyzed sequencing reactions. When the sequencing reaction employs detectably labeled nucleotides and/or detectably labeled multivalent molecules (e.g., having nucleotide units), the signals emitted by the nucleotides or nucleotide units that participate in the parallel sequencing reactions along the concatemer yields an increased signal intensity for each concatemer.

Compositions and methods for pairwise sequencing

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San Diego, CA, United States of America

Virginia Saade