All nextflow and nf-core pipelines have been successfully configured for use on the HPC Cluster at New York University. The configuration applies required and recommended options in order to have efficient and reliable nextflow runs. Below is the NYU HPC configuration and the latest version can always be found at Read more
UPDATED: April 16, 2024 nf-core is a community effort to collect a curated set of analysis pipelines built using Nextflow. This post will walk you through running the nf-core RNA-Seq workflow. The pipeline uses the STAR aligner by default, and quantifies data using Salmon, providing gene/transcript counts and extensive quality Read more
During the summer of 2020, the Ghedin and Gresham labs at New York University sequenced several SARS-CoV-2 isolates from clinical samples acquired in New York City. To visualize and share the data among researchers and collaborators we built a JBrowse web server. JBrowse is a web-based genome visualization software allowing Read more
This is an updated version of the variant calling pipeline post published in 2016 (link). This updated version employs GATK4 and is available as a containerized Nextflow script on GitHub. Identifying genomic variants, including single nucleotide polymorphisms (SNPs) and DNA insertions and deletions (indels), from next generation sequencing data is Read more
In the Kenneth Birnbaum Lab, we are interested in understanding how the plant root is able to grow continuously over the plant’s life and maintain its specific root structure (Fig.1). More specifically, what is the role of the stem cells present at the very tip of the root (QC and Read more
Next-generation sequencing technologies have allowed for sequencing at a low cost and fast speed, and is used more and more to study microbial communities. RNA-seq metatranscriptome and WGS metagenome studies aim to investigate microbial communities at genome and transcriptome levels. In this article, I will introduce a few tools that Read more
In this article I’ll go over three Nextflow patterns I frequently use to make development of Nextflow data processing pipelines easier and faster. I use each of these in most of my workflows, so they really come in handy. I am assuming here that you know what processes, channels, strings, Read more
Gene Set Enrichment Analysis (GSEA) is a common method to analyze RNA-Seq data that determines whether a predefined defined set of genes (for example those in a GO term or KEGG pathway) show statistically significant and concordant differences between two biological phenotypes. There are a myriad of tools for GSEA Read more
The bioinformatics team at the NYU Center for Genomics and Systems Biology in Abu Dhabi and New York have recently developed NASQAR (Nucleic Acid SeQuence Analysis Resource), a web-based platform providing an intuitive interface to popular R-based bioinformatics data analysis and visualization tools including Seurat, DESeq2, Shaman, clusterProfiler, and more. Read more
I recently helped the Rockman lab basecall their MinION sequencing data on the Prince HPC, leveraging the power of the GPUs available there. This allowed us to bring the total time required for basecalling down to around five hours, from the two weeks(!) it was going to take on the Read more