Target enrichment and quantification utilizing isothermally linear-amplified probes

Abstract

Transcript Enrichment and Quantification Utilizing Isothermally Linear-Amplified Sequencing (TEQUILA-seq) is a versatile, easy-to-implement, and highly cost-effective method utilizing isothermally linear-amplified capture oligos for targeted sequencing. TEQUILA-seq reduces the per-reaction cost of targeted capture by 2-3 orders of magnitude, as compared to a standard commercial solution. When performed on the Oxford nanopore platform for long-read RNA-seq with multiple gene panels of varying sizes, TEQUILA-seq consistently and substantially enriched transcript coverage while preserving transcript quantification. Profiling of full-length transcript isoforms of 468 actionable cancer genes across 40 breast cancer cell lines representing distinct intrinsic subtypes identified transcript isoforms enriched in specific subtypes and discovered novel transcript isoforms in extensively studied cancer genes such as TP53. Among cancer genes, tumor-suppressor genes were significantly enriched for aberrant transcript isoforms targeted for degradation via mRNA nonsense-mediated decay, revealing a common RNA-associated mechanism for gene inactivation. TEQUILA-seq can be broadly used for targeted sequencing of DNA and RNA in diverse biomedical research settings.

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