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Sebastian Kurscheid: RNA-S... Seq Tutorial from the iPlant Collaborative. Sebastian Kurscheid: Tutor... Tutorial on RNA-seq mapping and data analysis. Sebastian Kurscheid: RNA-S... Sebastian Kurscheid: RNA-S... Seq Data Analysis – Poll Results. Sebastian Kurscheid: RNA A... RNA Advances Reshape Prevailing Wisdom. From Genetic Engineering News Expanding on a concept originally coined by Walter Gilbert in 1986, Thomas Cech recently described two RNA worlds—a hypothetical, primordial world in which the same molecule combined informational and catalytic properties, and a contemporary world, forged by a spectrum of RNA-centered activities.

RNA Advances Reshape Prevailing Wisdom

While during the early days, following the discovery of DNA, RNA was thought to be the less interesting molecule, this view has dramatically changed in recent years. Advances in RNA biology are reshaping concepts that have been prevailing for a long time. For example, in the field of developmental biology, decisions were traditionally envisioned mostly in terms of the progressive expression of different combinations of transcription factors that are induced by specific combinations and concentrations of growth differentiation factors.

(read more…) Sebastian Kurscheid: RNA-s... Seq Workshop. An introductory course to RNA-seq INT Tumori, Milano, Italy, 28-29 March 2012 This hands-on course is held by the Bioinformatics and Genomics Unit with guest speakers from Illumina .

seq Workshop

The course is suitable for biologists who are new to RNA-seq technology. Sebastian Kurscheid: Oases... Sebastian Kurscheid: RNA-S... RNA-Seq Data Analysis – Where To Start? In our last reader poll, we asked: Do we yet have a firm handle on the most appropriate/accurate pipeline for analysis of RNA-Seq datasets?

RNA-Seq Data Analysis – Where To Start?

The overwhelming result was: NO. N=72. Sebastian Kurscheid: RNA-S... RNA-Seq Data Analysis Workshop. Sebastian Kurscheid: RNA-S... RNA-Seq Workshops. Sebastian Kurscheid: Model... Modeling RNA degradation for RNA-Seq. Methods for the estimation of the transcript’s abundance using RNA-Seq data have been intensively studied, many of which are based on the assumption that the short-reads of RNA-Seq are uniformly distributed along the transcripts.

Modeling RNA degradation for RNA-Seq

However, the short-reads are found to be nonuniformly distributed along the transcripts, which can greatly reduce the accuracies of these methods based on the uniform assumption. Several methods are developed to adjust the biases induced by this nonuniformity, utilizing the short-read’s empirical distribution in transcript. Sebastian Kurscheid: RNA-S... RNA-Seq to Measure Protein Abundance. Within the proteomics community there is a substantial interest in development of novel label-free quantitative proteomic strategies.

RNA-Seq to Measure Protein Abundance

One strategy is to take advantage of an increasing number of studies involving integrative analysis of gene and protein expression data that are based on new technologies such as next-generation transcriptome sequencing (RNA-Seq) and highly sensitive mass spectrometry (MS) instrumentation. Thus, it becomes interesting to revisit the correlative analysis of gene and protein expression data using more recently generated datasets to determine if gene expression data can be used as an indirect benchmark for such protein-level comparisons.

A team of researchers from the University of Michigan and the Chinese Academy of Sciences used publicly available mouse data to perform a joint analysis of genomic and proteomic data obtained on the same organism. Sebastian Kurscheid: Lever... Leveraging in Statistical Analysis of RNA-Seq. SPEAKER: Professor Ping Ma Department of Statistics Univ. of Illinois at Urbana-Champaign TIME & PLACE: Monday, February 20, 2012 12:00-1:00p The Forum, WID/MIR Building Dept of Statistics Univ of Wisconsin, Madison ABSTRACT: With the rapid development of second-generation sequencing technologies, RNA-Seq has become a popular tool for transcriptome analysis.

Leveraging in Statistical Analysis of RNA-Seq

It offers the chance to detect novel transcripts by obtaining tens of millions of short reads. After mapped to the genome and/or to the reference transcripts, RNA-Seq data can be summarized by a tremendous number of short-read counts. Sebastian Kurscheid: Compr... Comprehensive profile of the RNA editome. A Team of researchers from Taiwan & Denmark have performed a comprehensive profiling of the RNA editome of a male Han Chinese individual based on analysis of ~767 million sequencing reads from poly(A)+, poly(A)− and small RNA samples.

Comprehensive profile of the RNA editome

Developed a computational pipeline that carefully controls for false positives while calling RNA editing events from genome and whole-transcriptome data of the same individual.Identified 22,688 RNA editing events in noncoding genes and introns, untranslated regions and coding sequences of protein-coding genes. Most changes (~93%) converted A to I(G), consistent with known editing mechanisms based on adenosine deaminase acting on RNA (ADAR).Found evidence of other types of nucleotide changes; however, these were validated at lower rates.Found 44 editing sites in microRNAs (miRNAs), suggesting a potential link between RNA editing and miRNA-mediated regulation. Sebastian Kurscheid: A Sim... Sebastian Kurscheid: RNA-S...

Seq Poll Results. Sebastian Kurscheid: Last... Last Month’s RNA-Seq Industry Press. Feb 01, 2012 – DNA Sequencing – Technologies, Markets and Companies Applications of Sequencing in Healthcare 121 Introduction 121 Applications of sequencing in molecular diagnostics 121 Next generation sequencing for detection of solid organ transplant rejection 122 Applications of sequencing in oncology 122 A project to assess sequencing technologies for tumor DNA 123 Amplicon sequencing in…(read more) Feb 01, 2012 – Almac Announce Launch of Next Generation Sequencing (NGS) Data Analysis Services These latest enhancements to Almac’s service portfolio include a comprehensive range of NGS solutions from professional study design to sample processing and expert data analysis for DNA and RNA samples.

Last Month’s RNA-Seq Industry Press

Uniquely, the services are highly customizable and are available on a standalone basis or in combination with Almac’s established bioinformatics offerings…(read more) Sebastian Kurscheid: RNA-S... Sebastian Kurscheid: A new... Sebastian Kurscheid: RNA-S... Seq of Cows Milk. Cow milk is a complex bioactive fluid consumed by humans beyond infancy.

Seq of Cows Milk

Even though the chemical and physical properties of cow milk are well characterized, very limited research has been done on characterizing the milk transcriptome. This study performs a comprehensive expression profiling of genes expressed in milk somatic cells of transition (day 15), peak (day 90) and late (day 250) lactation Holstein cows by RNA sequencing. Sebastian Kurscheid: FX: a... Sebastian Kurscheid: RNA S... Sebastian Kurscheid: Revie... Review of RNA-Seq Data Analysis Software Tools. This review summarizes a number of frequently-used applications of transcriptome sequencing and their related analyzing strategies, including short read mapping, exon-exon splice junction detection, gene or isoform expression quantification, differential expression analysis and transcriptome reconstruction.

Review of RNA-Seq Data Analysis Software Tools

Table 1 Tools for short read mappingTable 2 A list of software for splice junction detectionTable 3 Software for gene or isoform expression quantificationTable 4 Available tools for differential expression analysisTable 5 Transcriptome reconstruction tools Chen G, Wang C, Shi T. (2011) Overview of available methods for diverse RNA-Seq data analyses. Sci China Life Sci 54(12), 1121-28. [article] Previous reviews covering RNA-Seq data analysis strategies and tools: Sebastian Kurscheid: Truly... Truly Digital RNA-Seq. Researchers at Harvard University have developed a method of truly digital RNA-Seq that does not rely on the counting of individual reads.

How is this possible you ask? Following reverse transcription, a large set of barcode sequences is added in excess, and nearly every cDNA molecule is uniquely labeled by random attachment of barcode sequences to both ends. Sebastian Kurscheid: The C... The Challenge of RNA-Seq. The authors of a recent review1, make some key points about some of the challenges that are general to all RNA-seq experiments: RNA-Seq rules!

– “By comparison to these [other next-gen sequencing] applications, RNA-sequencing (RNA-seq) may be leading the pack in popularity because of its ability to characterize transcriptomes, to assess differential gene expression and to essentially challenge the continued use of microarray technology for studying transcription.” There is no magic to RNA-Seq. – “We are concerned that next-generation technologies will, most likely, remain expensive for a while, and that there may be an inclination to revert to single sample science that is void of any ability to estimate biological and/or technical variation, or to test scientific hypotheses.”

Sebastian Kurscheid: GC-Co... Sebastian Kurscheid: Diffe...