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Friday, January 15, 2021

Virtual Global Summit: Using the unique capabilities of the Sequel II System for de novo genome assembly and full-length 16S sequencing

In this PacBio Virtual Global Summit 2020 presentation, Alvaro Hernandez of University of Illinois at Urbana-Champaign shares his experience introducing the Sequel II System to the DNA Sequencing facility at his institution. Hernandez also goes over recommendations to ensure high-quality de novo genome assemblies and benefits of full-length 16S sequencing, compared to the sequencing of variable regions.  Learn more about PacBio at https://pacb.com/ Legal & Trademarks: Visit https://www.pacb.com/legal-and-trademarks/

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Friday, January 15, 2021

Virtual Global Summit: HIT-scISOseq – High-throughput and high-accuracy single-cell full-length isoform sequencing

In this PacBio Virtual Global Summit 2020 presentation, Tang Chong of BGI shares work on how single-cell isoform sequencing can reveal transcriptomic dynamics in individual cells invisible to bulk- and single-cell RNA analysis based on short-read sequencing. However, current long-read single-cell sequencing technologies have been limited by low throughput and high error rate. Chong introduces HIT-scISOseq for high-throughput single-cell isoform sequencing. This method was made possible by full-length cDNA capture using biotinylated PCR primers, and by a novel library preparation procedure that combines head-to-tail concatemeric full-length cDNAs into a long SMRTbell insert for high-accuracy PacBio Sequencing. HIT-scISOseq represents a high-throughput,…

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Friday, January 15, 2021

Virtual Global Summit: The HiFi sequencing advantage for metagenome assembly

In this PacBio Virtual Global Summit 2020 presentation, Meredith Ashby of PacBio shares how researchers are using PacBio HiFi sequencing to overcome common challenges in microbiome research, including ambiguous taxonomic assignments and culture-resistant bacteria. Learn more about PacBio at https://pacb.com/ Legal & Trademarks: Visit https://www.pacb.com/legal-and-trademarks/

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Thursday, January 7, 2021

Technical Note: Preparing DNA for PacBio HiFi sequencing – Extraction and quality control

Single Molecule, Real-Time (SMRT) Sequencing uses the natural process of DNA replication to sequence long fragments of native DNA in order to produce highly accurate long reads, or HiFi reads. As such, starting with high-quality, high molecular weight (HMW) genomic DNA (gDNA) will result in longer libraries and better performance during sequencing. This technical note is intended to give recommendations, tips and tricks for the extraction of DNA, as well as assessing and preserving the quality and size of your DNA sample to be used for HiFi sequencing.

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Thursday, January 7, 2021

Application Note: Considerations for using the low and ultra-low DNA input workflows for whole genome sequencing

As the foundation for scientific discoveries in genetic diversity, sequencing data must be accurate and complete. With highly accurate long-read sequencing, or HiFi sequencing, there is no longer a compromise between read length and accuracy. HiFi sequencing enables some of the highest quality de novo genome assemblies available today as well as comprehensive variant detection in human samples. PacBio HiFi libraries constructed using our standard library workflows require at least 3 µg of DNA input per 1 Gb of genome length, or ~10 µg for a human sample. For some samples it is not possible to extract this amount of…

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Thursday, January 7, 2021

Application Brochure: Gene editing validation with HiFi reads

With highly accurate long reads (HiFi reads) from the Sequel IIe System, powered by Single Molecule, Real-Time (SMRT) Sequencing technology, you can efficiently and cost effectively validate gene editing techniques including adeno-associated virus (AAV) and CRISPR-Cas9 approaches.

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Wednesday, January 6, 2021

AGBT Presentation: Generating high quality human reference assemblies with PacBio sequencing

Tina Graves-Lindsay from the McDonnell Genome Institute reports at AGBT 2020 on how her team is using PacBio sequencing to produce reference-grade human genome assemblies. With highly accurate HiFi reads, no error correction step is needed during the sequencing and analysis process, and they can produce reference-grade assemblies with half the sequence coverage needed before. They are now generating diploid assemblies and will be contributing to the human pangenome reference project.

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Wednesday, January 6, 2021

AGBT Presentation: Studying CRISPR guide RNA specificity by amplification-free long-read sequencing

At AGBT 2020, Adam Ameur from Uppsala University discussed the use of long-read PacBio sequencing to detect off-target results from CRISPR/Cas9 gene editing studies. His team uses HiFi reads from the Sequel II System to perform whole genome sequencing and figure out exactly where guide RNAs bind. In one example using a human embryonic kidney cell line, they found 55 off-target sites for three guide RNAs. Ameur’s group has already generated preliminary data on results from editing living cells.

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