Breakthrough in DNA Sequencing: New Method Enables Efficient Nucleic Acid Analysis

Strategic Insights -

Researchers Karl Guegler, Tao Hong, and Jan F. Simons from Switchback Systems Inc. have developed a groundbreaking patent application for a novel method of analyzing nucleic acids using nanopore sensor technology. This innovative approach overcomes several challenges associated with traditional DNA sequencing, including reducing translocation speed, eliminating the need for template strand removal, and simplifying data analysis.

Key Takeaways:

  • The new method involves preparing double-stranded DNA products with a labeled strand and a single-stranded overhang, which is captured by a nanopore to initiate translocation.
  • The labeled strand is extended with a 5' non-complementary tail, allowing for the capture of the overhang by a nanopore and subsequent translocation at a rate of less than 1000 nucleotides per second.
  • The method includes steps of isolating the double-stranded product and treating it with a 3' single-stranded exonuclease to remove 3' overhangs prior to capture.
  • Optical labels on the labeled strand generate distinct optical signals as the strand passes through the nanopore, enabling detection of the sequence of the target polynucleotide.
  • The method can handle polynucleotides with different kinds of nucleotides and optical labels, allowing for determination of nucleotide sequences.
  • The invention addresses various challenges in nanopore-based analysis, including reducing translocation speed and simplifying sample preparation and data analysis.

Statistics:

  • The new method enables translocation at a rate of less than 1000 nucleotides per second (nt/sec).
  • The method can determine nucleotide sequences with high accuracy using optical signals generated by the optical labels.
  • The invention includes 15 claims, which cover various aspects of the novel method and its applications.

Sources:

  • Guegler, Karl; HONG, Tao; SIMONS, Jan F. Method Of Translocating Nucleic Acids Through Nanopores. U.S. Patent Application Number 20250320543, filed November 26, 2024 and posted October 16, 2025.
  • URL and more information on this patent application, see: https://ppubs.uspto.gov/pubwebapp/external.html?q=(20250320543)&db=US-PGPUB&type=ids
  • Keywords for this news article include: Business, Genetics, Switchback Systems Inc.