Notes: Bioinformatics Open Source Conference 2014 day 1 morning: Titus Brown, Genome Scale Data, OBF

I’m at the 2014 Bioinformatics Open Source Conference (BOSC) in Boston. It’s a great two day conference devoted to open source, science and community. Nomi Harris starts things off with an introduction to the goals and history of BOSC. She describes the evolution of BOSC since 2000: movement from open source advocacy to open source plus a community of developers. The emphasis is now on how to work better together and enable open science.

A History of Bioinformatics (in the Year 2039)

Titus Brown

Titus introduces his talk: “It’s hard to make predictions, especially about the future” as he pretends it’s 25 years from now and gets to look back on Bioinformatics from that perspective: bioinformatics science fiction. So read these notes as if Titus is talking from the future.

In the 20s, there was a datapoalypse due to the increasing ability to sequence and sample everything: biology became a data-intensive science. Biology, however, had optimized itself for hypothesis-driven investigation, not data exploration.

Issue 2 was the reproducibility crisis: a large percentage of papers could not replicate even with extensive effort. This is due to a lack of career/funding incentives for doing reproducible science. There was no independent replication.

Issue 3 was that biology was weak in terms of computing education. Many labs had datasets generated but without expertise or plans of how to analyze them. As a result, had an emphasize on easy to use tools: however, they embodied so many assumptions that many results are weak. Emphasis on bioinformatics work as sweatshops doing service bioinformatics without any future career path. As a result, well-trained students left for data science.

Came up with 3 rules for reviews: all data and source code must be in paper, full methods included in primary paper review and methods need publication in associated paper. Answer: more pre-prints. Open peer review led to replication studies, where a community of practice developed around replication. Shift in thinking about biology: biomedical enterprise rediscovers basic biology, rise of open science, investment in people.

Biomedical community moves away from translational medicine into veterinary and agricultural animals as model organisms. Biotech pressured congress to decrease funding since adameic papers were often wrong without raw data, and funding crunch joined hypothesis discovery with data interpretation. Resulted in university collapse which led to a massive increase in creativity during research.

Sage bionetworks: collected data from small consortia and made it available to everyone at publication. Led people to understand there was nothing to fear from making data available. NIH finally invested heavily in training: software, data and model carpentry.

Current problems (in 2039): still unknown functional annotations, career paths still uncertain, glam data replaces glam publications. Many complex diseases remain poorly understood.

BRAIN2050 10-year proposal to understand the brain, focusing on neurodegenerative diseases. Correlation is not causation: problem with current MIND project. Hard to extract data from recording all of the neurons. Computational modeling is critical: can we develop hypotheses that test against the data. Holistic approach needed.

Focus less on reproducibility: strict requirement makes science slow. Can we compromise? Borrow idea of technical debt from software: replication debt. Do rapid iterations of analysis, then re-examine with semi-independent replication. Acknowledge debt to make it known to potential users of research.

Invest in infrastructure for collaboration: enable notification of analyses to allow collaboration between previously unconnected groups. Build commercial software when basics understood. Invest in training as first class research citizen. Biology suggestions: needs to understand the full network system to understand complex biology.

Conclusion: there will be a tremendous amount of change that we cannot predict. We need to invest in people and process and must help figure out the right process and provide career incentives. However, economics matter a lot. Need to convince the public that support for science matters.

Plugs for other talks: Mike Schatz on next ten years in quantitative biology.

Genome-scale Data and Beyond

ADAM: Fast, Scalable Genomic Analysis

Frank Nothaft

Frank talks about work at UC Berkeley, Mt Sinai, Broad on ADAM: a distributed framework for scaling genome analysis. Toolsets – avacado: distributed local assembler, RNAdam: RNA-seq analysis, bdg-services: ADAM clusters, Guacamole: distributed somatic variant caller. Provides a data format that can be cleanly parallelized. ADAM stack uses Apache Spark, Avro, Parquet. Principle is to avoid locking data in and play nicely with other tools. Parquet is an open source columnar file format that compresses well, limits IO and enables fast scans by only loading needed columns.

One approach is to reimplement base quality score recalibration (BQSR). Have a fully parallel version that splits by reads, only requiring a shared 3Gb read-only table of variants (from dbSNP) to mask known variants. 2x faster than Picard on single cores, and 50x faster on cluster on Amazon with smaller machines. Have >99% concordant with BQSR; actually better due to error in GATK implementation.

Automated RNA-seq differential expression validation

Rory Kirchner

Contrast: 1/2 million hits for RNA-seq analysis pipelines, but poll on SeqAnswers: biggest problem in RNA-seq is a lack of reproducible pipelines. Complexity issue is the large number of tools and combinations of those tools. Implemented in bcbio-nextgen. Describes all the goals for bcbio, stealing everything I’m going to talk about tomorrow. Nice slide of work in the RNA-seq pipeline that used. The validation framework enables evaluating actual changes in the pipeline: demonstrates example with trimming versus non-trimming – no difference at all on high-quality validation set. Another nice plots shows difference in doing RNA-seq with 3 replicates at 100M/replicate, 15 minutes at 20M reads. More replicates = better than deeper sequencing.

New Frontiers of Genome Assembly with SPAdes 3.1

Andrey Prjibelski

SPAdes initially designed for single-cell assembly but also works well on standard multi-cell material. Ranked high alongside Salzberg lab with MaSuCRa. Handles tricky non-diploid genomes like plants. Works with IonTorrent for error correction: IonHammer that corrects indels and mismatches. Alongside BayesHammer for Illumina reads. SPAdes works on Illumina BaseSpace platform, DNANexus and Galaxy. Wow, integrated everywhere. With Illumina nextera mate pairs, have improved distribution of correct read pairs. Velvet assembled these better than SPAdes according to N50-based metrics, but in quality metrics SPAdes show better. Shows importance of establishing community benchmarks and values. Titus mentions memory usage a problem on large genomes.

SigSeeker: An Ensemble for Analysis of Epigenetic Data

Jens Lichtenberg

SigSeeker handles analysis of epigenetic methylation and histone modifications: CHiP-seq. Motivation: lots of tools but not good evaluations of processes. Idea was to provide an ensemble based approach to understand tradeoffs of tools. Ways to correlate: by location in the genome, and by intensity. Removes outliers to help resolve ones called consistently between tools. Produced nice correlations between all of the different tools. Also layered on top of biology for blood cell differentiation. Argues that adding tools adds power alongside addition of technical replicates.

Galaxy as an Extensible Job Execution Platform

John Chilton

John talking about Galaxy integration with clusters. Goal is to convince that Galaxy runs jobs awesomely on clusters and clouds. The whole process is pluggable and John wants to convince you to use Galaxy as a platform. Galaxy Pulsar allows you to execute jobs in the same manner Galaxy does. Allows deployers to route jobs based on inputs: the dynamic job installations allows delaying of job, parameter collection from tools, pull resource usage from recent jobs. Dynamic job state handlers: enable resubmission of jobs to larger resources after hitting resource/time limits. New plugin infrastructure with Docker containers for installation.

Added job metrics, collecting information about job runtime, cores and compute using collectl. Need to look at what John is doing with initial work in bcbio. Pulsar (formerly LWR) getting lots of usage under the covers at Galaxy by running jobs on TACC. Prototype using Pulsar on top of Mesos.

Open Bioinformatics Foundation (OBF) update

Hilmar Lapp

Hilmar provides an update on what is happening with the Open Bioinformatics Foundation. He describes all the work Open Bio does as a non-profit, volunteer run organization: BOSC, Codefests, Hackathons and GSoC. Interestingly, 120 Open-Bio members but Biopython/BioPerl mailing list communities are 1000+ people. OBF now associated with Software in the Public Interest (SPI), can easily donate. Hilmar discusses the challenges associated with moving forward on progress using an all volunteer organization.


2 thoughts on “Notes: Bioinformatics Open Source Conference 2014 day 1 morning: Titus Brown, Genome Scale Data, OBF

  1. Pingback: ISMB 2014 Link Roundup

  2. Pingback: Notes: Bioinformatics Open Source Conference 2014 day 1 afternoon: Visualization, Project updates and lightning talks | Small Change Bioinformatics

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