Jim Shaw

@jimshaw.bsky.social

Postdoc at Dana-Farber and Harvard Med with Heng Li (@lh3lh3.bsky.social). Prev: UBC / UofT. I like thinking about biological sequence analysis and its applications to metagenomics / microbial genomics. https://jim-shaw-bluenote.github.io

It's out! Excited to present the Great Barrier Reef Microbial Genomes Database (GBR-MGD), a comprehensive DB of 1000s of high-quality prokaryote, virus, plasmid, and chromosome-level eukaryote MAGs using Nanopore long reads. Subthreads incoming. Please share widely. 🙂 www.nature.com/articles/s41...

The planktonic microbiome of the Great Barrier Reef - Nature

The Great Barrier Reef Microbial Genomes Database compiles prokaryotic, viral and eukaryotic genomes from seawater collected from the Great Barrier Reef, providing a rich resource for the study of mar...

nature.com

How good is MiniBWA, the successor to BWA? To test it, I ran MiniBWA on sequencing from 76 different species, comparing mapping speed, rate and accuracy with BWA MEM. In short, it's really good. If you map short reads, it's well worth your time. andrewcarroll.github.io/2026/06/30/t...

The Best of Both Worlds - Assessing MiniBWA

Recently, Heng Li released MiniBWA (GitHub) alongside a paper by Heng Li and Nils Homer describing the method (paper). MiniBWA builds on the approaches in Minimap2 (also by Heng Li), but falls back on...

andrewcarroll.github.io

Congratulations to my PhD student, Stefania Andrea Rosso Villanelo, on publishing her first first-author paper! 🎉In this study, she used antibiotics to facilitate the isolation of previously uncultured bacterial species from activated sludge. Check it out! 🦠🧫💊 journals.asm.org/doi/10.1128/...

Application of antibiotics for the selective isolation of previously uncultured species from activated sludge | Microbiology Spectrum

Biological wastewater treatment relies on diverse microbial communities to degrade pollutants and drive nutrient transformations. Understanding the physiology and metabolism of these microorganisms is essential for improving the efficiency and cost-effectiveness of treatment processes. Much of our current knowledge is derived from 16S rRNA gene amplicon sequencing and metagenomic analyses. However, validating these sequencing- and genome-based insights requires bacterial species as pure cultures, and only a limited number of taxa common in wastewater treatment plants are currently available in culture. Here, we present an isolation strategy that uses antibiotics as a selective pressure to reduce microbial complexity and alleviate competitive exclusion during cultivation, while full-length 16S rRNA gene amplicon sequencing is used to monitor enrichment and guide targeted isolation, thereby facilitating the recovery of process-relevant activated sludge bacteria, including potentially uncultured taxa. These isolates can serve as model organisms for experimental validation of genome-based predictions.

journals.asm.org

H

Minibwa is a hybrid of bwa-mem and minimap2 and the successor of bwa-mem for short-read mapping. ~4X/2.5X as fast as bwa-mem/bwa-mem2 for WGS reads at comparable accuracy. Native support of directional bisulfite-seq. Applicable to long reads. Preprint at arxiv.org/abs/2606.15357

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#rustbio 4.0 has been released. It harmonizes the error handling, improves the API, makes gap-open/extend behavior in pairwise alignment more intuitive and in-line with the literature, improves GFF parsing, and allows incremental building of the rank-select datastructure. github.com/rust-bio/rus...

Release v4.0.0 · rust-bio/rust-bio

4.0.0 (2026-06-12) ⚠ BREAKING CHANGES Replace anyhow with typed thiserror errors (#674) Change Phase conversion methods to use TryFrom for better error handling (#625) for pairwise alignment, only...

github.com

Excited to share our review relating to the giant extrachromosomal elements (ECEs) We cover: why long-read metagenomics enables their discovery, genomic comparisons across recently characterized examples, and limitations of current classification tools. www.cell.com/trends/genet...

Giants within: a new class of microbial mobile elements

Prokaryotes harbor a diverse spectrum of extrachromosomal elements (ECEs), which are intracellular replicons maintained independently of the primary chromosome. Historically, the ECE research field ha...

cell.com

Our method, savont, for generating amplicon sequence variants (ASVs) for long-read amplicons is now on bioRxiv. Work with @lh3lh3.bsky.social and help from @mkddueholm.bsky.social and team (Marie Riisgaard-Jensen, @kirk3gaard.bsky.social, Kasper Skytte Andersen) github.com/bluenote-157... 1/6

bioRxiv Bioinfo@biorxiv-bioinfo.bsky.social · 2mo ago

Sensitive long-read amplicon sequence variant recovery with savont https://www.biorxiv.org/content/10.64898/2026.05.26.727271v1

Come to ONT's industry event at ASM to hear about two exciting new tools from @jimshaw.bsky.social! SNPmers (polymorphic kmers) are leveraged for impressive performance in both myloasm (metagenomic assembly) and savont (16S ASVs). Registration link 👇

Oxford Nanopore@nanoporetech.com · 2mo ago

Join Jim Shaw at #ASMicrobe to uncover how to unlock high-resolution, strain-level microbiome insights. Learn how this is could be crucial to helping deliver more precise diagnostics and treatment in the future. https://bit.ly/4v4XuKE

Excited to speak at ASM Microbe 2026 in the Oxford Nanopore session about new tools for long-read metagenomics + 16S sequencing. If you're attending ASM Microbe June 4-7 in D.C. and want to chat, let me know!

Oxford Nanopore@nanoporetech.com · 2mo ago

Join Jim Shaw at #ASMicrobe to uncover how to unlock high-resolution, strain-level microbiome insights. Learn how this is could be crucial to helping deliver more precise diagnostics and treatment in the future. https://bit.ly/4v4XuKE