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Engineering of systems, methods and optimized guide compositions for sequence manipulation

  • US 8,906,616 B2
  • Filed: 05/29/2014
  • Issued: 12/09/2014
  • Est. Priority Date: 12/12/2012
  • Status: Active Grant
First Claim
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1. An engineered, non-naturally occurring composition comprising a Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)-CRISPR associated (Cas) (CRISPR-Cas) system having a guide RNA polynucleotide sequence, wherein the polynucleotide sequence comprises(a) a guide sequence capable of hybridizing to a target sequence in a eukaryotic cell,(b) a tracr mate sequence, and(c) a tracr sequencewherein (a), (b) and (c) are arranged in a 5′

  • to 3′

    orientation,wherein when transcribed, the tracr mate sequence hybridizes to the tracr sequence and the guide sequence directs sequence-specific binding of a CRISPR complex to the target sequence,wherein the to CRISPR complex comprises a Type II Cas9 protein complexed with (1) the guide sequence that is hybridized to the target sequence, and (2) the tracr mate sequence that is hybridized to the tracr sequence,wherein in the polynucleotide sequence, one or more of the guide, tracr and tracr mate sequences are modified.

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