Obtaining microbial genomes with the highest accuracy and contiguity is extremely important when exploring the functional impact of genetic and epigenetic variants on a genome-wide scale. A comprehensive view of the bacterial genome, including genes, regulatory regions, IS elements, phage integration sites, and base modifications is vital to understanding key traits such as antibiotic resistance, virulence, and metabolism. SMRT Sequencing provides complete genomes, often assembled into a single contig. Our streamlined microbial multiplexing procedure for the Sequel System, from library preparation to genome assembly, can be completed with less than 8 hours bench time. Starting with high-quality genomic DNA (gDNA),…
The Sequel II System, powered by Single Molecule, Real Time (SMRT) Technology, delivers highly accurate long reads for a comprehensive view of genomes, transcriptomes and epigenomes.
Highly accurate long reads – HiFi reads – with single-molecule resolution make Single Molecule, Real-Time (SMRT) Sequencing ideal for full-length 16S rRNA sequencing, shotgun metagenomic profiling, and metagenome assembly.
The Sequel System, powered by Single Molecule, Real Time (SMRT) Technology, delivers long reads, high consensus accuracy, uniform coverage and epigenetic characterization.
In this ASHG 2020 PacBio Workshop Jonas Korlach, CSO, shares how the new PacBio Sequel IIe System makes highly accurate long-read sequencing easy and affordable so?all scientists can gain comprehensive views of human genomes and transcriptomes. He goes on to provide updates on the applications including human WGS for variant detection, de novo genome assembly, single-cell full-length RNA sequencing, and targeted sequencing using PCR and No-Amp methods.
Although PCR is a cost-effective way to enrich for genomic regions of interest for DNA sequencing, amplifying regions with extreme GC-content and long stretches of short tandem repeat (STR) sequences is often problematic and prone to sequence artifacts. This is especially true when developing multiplexed PCR assays for clinical applications such as carrier screening for multiple genes. The additional challenge is that all PCR primer pairs must be carefully selected to be compatible based on amplicon size and PCR conditions. Due to these experimental design constraints, a single tube with a high number of multiplexed PCR amplicons is difficult to…
PacBio scientist Khai Luong reviews her AGBT poster which was the first example showing SMRT Sequencing could be used to directly detect epigenetic modification in a eukaryotic organism.
Jonas Korlach, CSO of PacBio, discusses the revival of finished genomes the microbial community will see with long read data, emphasizing that for certain organisms such as rapidly evolving microbes, having a de novo finished genome will be more useful than creating a draft based on a previous related reference genome. Korlach describes two bioinformatic methods from PacBio, a hierarchical genome assembly process (HGAP) and an consensus caller (Quiver), which are used to generate finished genomes from just long-read PacBio data, with final genome sequence accuracies over 99.999%. Korlach demonstrates the ability of PacBio data to generate closed, high-quality de…
Garth Ehrlich from the Center for Genomic Sciences at Allegheny Singer Research Institute reports on new studies of pneumococcal epigenetics. Streptococcus pneumonia, which causes more than 1.6 million deaths annually, has a highly plastic genome. Methylation analysis with SMRT Sequencing found a novel modification in addition to the expected epigenetic changes.
Peter Evans from the US FDA shares insights on whole-genome sequencing for bacteria of importance to public health. Comparing data across PacBio, 454, and MiSeq sequencers, he says having closed genomes, long reads, and methylation patterns are critical for gleaning comprehensive information about a microbe.
UC Davis’s Bart Weimer describes foodborne pathogens and their proclivity for rapid genome rearrangement. The 100K Pathogen Genome Project he leads is using PacBio long-read sequencing to close genomes and analyze methylation; Weimer reports that his team has already discovered new epigenetic modifications in Salmonella and Listeria with the technology.
How does the PacBio sequencer produce epigenetic data? CSO Jonas Korlach describes how the technology works, which DNA modifications can be detected, and gives examples of kinetic signatures for various modifications and their associated target motifs.
Yuta Suzuki from the University of Tokyo presents his AGBT poster on heterozygotic DNA methylation patterns. He used kinetic data from SMRT Sequencing to generate epigenetic information on samples ranging from human to medaka fish and was able to analyze haplotype-specific methylation data. He also shows that long reads are better able to capture data about CpG islands than short-read sequences.
Yuta Suzuki from the University of Tokyo details his experience using SMRT Sequencing for generating data for haplotype-specific epigenetic analysis.
The Sequel System, powered by Single Molecule, Real-Time (SMRT) Technology, delivers long reads, high consensus accuracy, uniform coverage and epigenetic characterization. This newly introduced platform provides higher throughput, a reduced footprint and lower sequencing project costs compared to the PacBio RS, the original long-read sequencer.