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Friday, September 18, 2020

Webinar: Beyond a single reference genome – The advantages of sequencing multiple individuals

Hear how scientists have used PacBio sequencing to develop pangenome collections and to study population genetics of plant and animal species to power their research. Learn about the advantages of sequencing multiple individuals to gain comprehensive views of genetic variation, and understand the speed, cost, and accuracy benefits of using highly accurate long reads (HiFi reads) to sequence your species of interest.

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Thursday, August 27, 2020

Featured Interview: The Rise of Long Reads – Mike Snyder says long-read sequencing is critical to understanding the transcriptome

Genomics luminary Mike Snyder, Profesor and Chair of the Genetics Department at Stanford University and Director of the Stanford Center for Genomics and Personalized Medicine, has been making strides in gene expression studies for years. His latest advance: analyzing whole human transcriptomes, which he calls personal transcriptomes, to better understand gene activity in an individual. Snyder says this approach could one day become a crucial element in clinical care. Dr. Snyder has published recent papers in Nature Biotechnology and PNAS using Single Molecule, Real- Time (SMRT) Sequencing for transcriptome analysis and demonstrated that long reads enable full coverage of RNA molecules. Recently he talked…

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Thursday, August 27, 2020

HLA Sequencing Application Brochure: Fully phased, allele-specific HLA sequencing – the perfect pair

Single Molecule Real-Time (SMRT) Sequencing delivers reads that span the lengths of the majority of HLA class I and II genes. Unambiguously phase 4-field HLA types without imputation. With a more accurate and complete picture, gain deeper understanding of immune-related disease causality, graft-versus-host disease in hematopoietic transplantation, and drug hypersensitivity.

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Thursday, August 27, 2020

Epigenetics Application Brochure: Characterize the epigenetic landscape of your genome

Single Molecule, Real-Time (SMRT) Sequencing directly detects DNA modifications by measuring variation in the polymerase kinetics of DNA base incorporation during sequencing. With high throughput, long reads, and the sensitivity to detect epigenetic modification without amplification or chemical conversions, the PacBio Systems offer scalable solutions for assessing DNA modifications in bacterial and eukaryotic genomes.

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Thursday, August 27, 2020

Case Study: Improving precision medicine studies in Asia using ethnicity-specific human reference genomes and PacBio long-read sequencing

Several new high-quality human genome assemblies produce ethnicity-specific reference sequences and show how scientists can use this genetic information to improve precision medicine studies in Asian sub- populations. These projects demonstrate how long- read SMRT Sequencing provides robust detection of polymorphic structural variants in clinically relevant gene coding regions and phases variants into haplotypes.

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Thursday, August 27, 2020

Application Brief: Long-read RNA sequencing – Best Practices

With Single Molecule, Real-Time (SMRT) Sequencing and the Sequel Systems, you can easily and affordably sequence complete transcript isoforms in genes of interest or across the entire transcriptome. The Iso-Seq method allows users to generate full-length cDNA sequences up to 10 kb in length — with no assembly required — to confidently characterize full-length transcript isoforms.

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Friday, July 31, 2020

Webinar: SMRT Sequencing applications for human genomics and medicine

In this webinar, Adam Ameur of SciLifeLab at Uppsala University shares how he uses Single Molecule, Real-Time (SMRT) Sequencing applications for medical diagnostics and human genetics research, including sequencing of single genes and de novo assembly of human genomes as well as a new method for detection of CRISPR-Cas9 off-targets.

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Wednesday, May 13, 2020

PacBio Workshop: Understanding the biology of genomes with HiFi sequencing

The utility of new highly accurate long reads, or HiFi reads, was first demonstrated for calling all variant types in human genomes. It has since been shown that HiFi reads can be used to generate contiguous, complete, and accurate human genomes, even in repeat structures such as centromeres and telomeres. In this virtual workshop scientists from PacBio as well as Tina Graves-Lindsay from the McDonnell Genome Institute at Washington University share the many improvements we’ve made to HiFi sequencing in the past year, tools that take advantage of HiFi data for variant detection and assembly, and examples in numerous genomics…

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Monday, May 4, 2020

Webinar: Long HiFi reads for high-quality genome assemblies

In this LabRoots webinar, Jonas Korlach the CSO of PacBio provides an introduction to PacBio HiFi sequence reads, which are both long (up to 25 kb currently) and accurate (>99%) at the individual single-molecule sequence read level andhave allowed for advances in de novo genome assemblies. Korlach reviews the characteristics of HiFi read data obtained with the Sequel II System, followed by examples of high-quality genome assemblies for human, plant and animal genomes including the different aspects of evaluating genome assemblies (contiguity, accuracy, completeness and allelic phasing) and illustrates their high quality by examples of resolving centromeres, telomeres, segmental duplications…

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Tuesday, April 21, 2020

Characterization of Reference Materials for Genetic Testing of CYP2D6 Alleles: A GeT-RM Collaborative Project.

Pharmacogenetic testing increasingly is available from clinical and research laboratories. However, only a limited number of quality control and other reference materials currently are available for the complex rearrangements and rare variants that occur in the CYP2D6 gene. To address this need, the Division of Laboratory Systems, CDC-based Genetic Testing Reference Material Coordination Program, in collaboration with members of the pharmacogenetic testing and research communities and the Coriell Cell Repositories (Camden, NJ), has characterized 179 DNA samples derived from Coriell cell lines. Testing included the recharacterization of 137 genomic DNAs that were genotyped in previous Genetic Testing Reference Material Coordination…

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Tuesday, April 21, 2020

Haplotype-Resolved Cattle Genomes Provide Insights Into Structural Variation and Adaptation

We present high quality, phased genome assemblies representative of taurine and indicine cattle, subspecies that differ markedly in productivity-related traits and environmental adaptation. We report a new haplotype-aware scaffolding and polishing pipeline using contigs generated by the trio binning method to produce haplotype-resolved, chromosome-level genome assemblies of Angus (taurine) and Brahman (indicine) cattle breeds. These assemblies were used to identify structural and copy number variants that differentiate the subspecies and we found variant detection was sensitive to the specific reference genome chosen. Six gene families with immune related functions are expanded in the indicine lineage. Assembly of the genomes of…

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Tuesday, April 21, 2020

RNA sequencing: the teenage years.

Over the past decade, RNA sequencing (RNA-seq) has become an indispensable tool for transcriptome-wide analysis of differential gene expression and differential splicing of mRNAs. However, as next-generation sequencing technologies have developed, so too has RNA-seq. Now, RNA-seq methods are available for studying many different aspects of RNA biology, including single-cell gene expression, translation (the translatome) and RNA structure (the structurome). Exciting new applications are being explored, such as spatial transcriptomics (spatialomics). Together with new long-read and direct RNA-seq technologies and better computational tools for data analysis, innovations in RNA-seq are contributing to a fuller understanding of RNA biology, from questions…

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Tuesday, April 21, 2020

Variant Phasing and Haplotypic Expression from Single-molecule Long-read Sequencing in Maize

Haplotype phasing of genetic variants is important for interpretation of the maize genome, population genetic analysis, and functional genomic analysis of allelic activity. Accordingly, accurate methods for phasing full-length isoforms are essential for functional genomics study. In this study, we performed an isoform-level phasing study in maize, using two inbred lines and their reciprocal crosses, based on single-molecule full-length cDNA sequencing. To phase and analyze full-length transcripts between hybrids and parents, we developed a tool called IsoPhase. Using this tool, we validated the majority of SNPs called against matching short read data and identified cases of allele-specific, gene-level, and isoform-level…

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Tuesday, April 21, 2020

Salmonella Genomic Island 3 Is an Integrative and Conjugative Element and Contributes to Copper and Arsenic Tolerance of Salmonella enterica.

Salmonella genomic island 3 (SGI3) was first described as a chromosomal island in Salmonella 4,[5],12:i:-, a monophasic variant of Salmonella enterica subsp. enterica serovar Typhimurium. The SGI3 DNA sequence detected from Salmonella 4,[5],12:i:- isolated in Japan was identical to that of a previously reported one across entire length of 81?kb. SGI3 consists of 86 open reading frames, including a copper homeostasis and silver resistance island (CHASRI) and an arsenic tolerance operon, in addition to genes related to conjugative transfer and DNA replication or partitioning, suggesting that the island is a mobile genetic element. We successfully selected transconjugants that acquired SGI3…

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