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Dan Portik

@dportik.bsky.social
2K followers 721 following 99 posts

Industry bioinformatics scientist. Long-read metagenomics & methylation, and previously phylogenomics & frog/lizard evolution. 🦠 🐸 🦎 🧬 Free time: climbing 🧗, curling 🥌, and plants 🪴🌵.

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Dan Portik @dportik.bsky.social · 05/08/2026
After 6 years, my time with PacBio came to an end last week. I'm proud of what I achieved - especially building the long-read #metagenomics program from scratch, and launching 5mC and 5hmC. However, all the positive interactions with the scientific community is what made this job truly meaningful.
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bioRxiv Genomics @biorxiv-genomic.bsky.social · 24/06/2026
A Scalable Framework for Species-Resolved Human Gut Microbiome Profiling Using Full-Length 16S rRNA Sequencing www.biorxiv.org/content/10.64898/20…
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PacBio @pacbio.bsky.social · 14/06/2026
Sharing results from a beta test of PacBio’s SPRQ-Nx reusable SMRT cells using two acquisitions! This increased SMRT cell throughput reduces sequencing costs for large human WGS projects. #ESHG2026 #PacBio #ESHG
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Dan Portik @dportik.bsky.social · 28/05/2026
Now live! Submit a 100 word proposal to win free #PacBio HiFi sequencing for #metagenomics. Long-read metagenomics is rapidly gaining traction and this is a great time to apply it to your research. programs.pacb.com/l/1652/2026-...
programs.pacb.com
2026 PacBio SMRT Grant | Metagenomics
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PacBio @pacbio.bsky.social · 26/05/2026
SPRQ-Nx chemistry is now shipping worldwide, bringing sub-$300 HiFi genomes to the Revio platform! This global rollout cuts sequencing costs by 30%, making it easier than ever to scale high-throughput workflows Full press release here: bit.ly/49HwmcL #SPRQNx #PacBio #HiFisequencing #Revio
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The Banfield Lab @banfieldlab.bsky.social · 30/03/2026
Congratulations @wshuai.bsky.social and co-authors! We’re excited to introduce MODIFI, our new scalable method for detecting DNA modifications in PacBio metagenomic data and estimating ECE-host linkage. Check out the preprint: www.biorxiv.org/content/10.6...
biorxiv.org
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bioRxiv Bioinfo @biorxiv-bioinfo.bsky.social · 30/03/2026
methbiome: reference-based DNA methylation profiling of long-read metagenomic data www.biorxiv.org/content/10.64898/20…
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PacBio @pacbio.bsky.social · 18/03/2026
PacBio is proud to partner with Basecamp Research to generate high-fidelity metagenomic data for the Trillion Gene Atlas, a landmark initiative to model biological data at the trillion-gene scale and accelerate AI-designed therapeutics. Learn more here: bit.ly/479RQh3 #PacBio #TrillionGeneAtlas
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Basecamp Research @basecamp-research.bsky.social · 18/03/2026
We’re launching the Trillion Gene Atlas with Anthropic, NVIDIA, PacBio, and UltimaGenomics. 🌍 The Goal: To expand known genomes 100×, sequencing 100M+ species to build foundation models grounded in evolution itself. 🔗 Read more: www.prnewswire.com/news-release...
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Dan Portik @dportik.bsky.social · 26/02/2026
We've seen a big increase in the number of long-read #metagenomics publications, especially those using #PacBio HiFi data. Also very encouraging to all the new tools for long-read metagenome assembly & taxonomic profiling. Complete list of publications: github.com/PacificBiosc...
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single-molecule.bsky.social @single-molecule.bsky.social · 24/02/2026
#AGBTGM26 flash poster - Nick Renshaw from Wellcome Sanger on automated libray prep for PacBio Plex prep 96 kit. Use for microbial. Pacbio outperformed Illumina and ONT on assembly
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Cameron Thrash @jcamthrash.bsky.social · 04/02/2026
Accurate plasmid reconstruction from metagenomics data using assembly–alignment graphs and contrastive learning www.nature.com/articles/s41... #jcampubs
nature.com
Accurate plasmid reconstruction from metagenomics data using assembly–alignment graphs and contrastive learning - Nature Biotechnology
PlasMAAG uses cross-sample information to improve plasmid reconstruction from metagenomic samples.
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Stephen Turner @stephenturner.us · 05/02/2026
Accurate plasmid reconstruction from metagenomics data using assembly–alignment graphs and contrastive learning www.nature.com/articles/s41... 🧬💻🧪 github.com/RasmussenLab...
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Gang Fang @gangfang.bsky.social · 05/02/2026
New Preprint 📢 from our team 🔎 Critical assessment of #intratumor and #low #biomass #microbiome using #longread sequencing Some studies suggest bacteria 🦠 live inside tumors and influence cancer treatment. But there’s also been a major #debate: in these very​ low-microbe tissue samples, how much 1/
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Simon Roux @simrouxvirus.bsky.social · 09/12/2025
🧬🦠🚨 Another new paper alert, this time led by @maureenbug.bsky.social ! In collaboration with the Emerson lab and @titus.idyll.org lab (@taylorreiter.bsky.social), both at UC Davis. Asking the question: what are we missing in short-read metagenome assembly, and why ? doi.org/10.1093/narg...
doi.org
Comparison of short-read and long-read metagenome assemblies in a natural soil community highlights systematic bias in recovery of high-diversity populations
Abstract. Comparisons of long-read and short-read (meta)genome assemblies typically show that short-read sequence assemblies are less error-prone, but stru
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Roland Faure @rfaure.bsky.social · 03/10/2025
Our preprint on our new metagenomic HiFi assembler Alice is out 🥳 Based on a *new sketching method* (🧵1/6) 👉 Preprint www.biorxiv.org/content/10.1... 👉 Github github.com/rolandfaure/...
biorxiv.org
Alice: fast and haplotype-aware assembly of high-fidelity reads based on MSR sketching
We introduce Mapping-friendly Sequence Reduction (MSR) sketches, a sketching method for high-fidelity (HiFi) long reads, and Alice, an assembler that operates directly on these sketches. MSR produces ...
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Gang Fang @gangfang.bsky.social · 22/10/2025
Excited to share our LongTrack study out in @natmicrobiol.nature.com today! Fecal microbiota transplant (FMT), donor 💩 => patients' gut, is an effective treatment for recurrent C. difficile infection & is being evaluated for Inflammatory Bowel Diseases (IBD) & other conditions 1/ 📄 rdcu.be/eL8mR
rdcu.be
Long-read metagenomics for strain tracking after faecal microbiota transplant
Nature Microbiology - A long-read metagenomics method empowers faecal microbiota transplantation studies by precisely tracking bacteria from donors to recipients, distinguishing co-existing strains...
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Dan Portik @dportik.bsky.social · 15/10/2025
Another #metagenome assembly algorithm for #PacBio HiFi data - introducing Alice! I'll be very interested to see how this performs on some of our trickier datasets. More broadly, I'm happy to see continual development of tools for long-read #metagenomics. doi.org/10.1101/2025...
doi.org
Alice: fast and haplotype-aware assembly of high-fidelity reads based on MSR sketching
We introduce Mapping-friendly Sequence Reduction (MSR) sketches, a sketching method for high-fidelity (HiFi) long reads, and Alice, an as-sembler that operates directly on these sketches. MSR produces...
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Jon Belyeu @jonbelyeu.bsky.social · 15/10/2025
My new tool Paraviewer is now available for use at github.com/PacificBiosc...! If you use Paraphase, try this new next-step tool - it automates and greatly simplifies variant visualization from Paraphase variant calling. If you're at #ASHG2025, visit me today at poster 4109W. #pacbio
github.com
GitHub - PacificBiosciences/Paraviewer
Contribute to PacificBiosciences/Paraviewer development by creating an account on GitHub.
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PacBio @pacbio.bsky.social · 14/10/2025
#PacBio announces major upcoming advances for #Revio and #Vega designed to lower genome costs, expand multiomic capabilities, and support regulated research. The SPRQ-Nx chemistry, now in beta access, delivers complete genomes for under $300 at scale. View the press release: bit.ly/4o06eyH
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patientuser.com @patientuser.com · 14/10/2025
omicsomics.blogspot.com/2025/10/pacb... $300 LongRead personal genome via PacBio
omicsomics.blogspot.com
PacBio: $300 Genome Via Chemistry Update
ASHG is here in Boston, just down the street from Ginkgo's HQ.  I'm in a new role in Ginkgo Automation, trying to convince the NGS world tha...
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StockTitan @stocktitan.net · 14/10/2025
#PACB PacBio Announces Major Advances for Revio and Vega to Lower Genome Cost and Expand Multiomic Capabilities www.stocktitan.net/news/PACB/pac-bi…
stocktitan.net
PacBio Announces Major Advances for Revio and Vega to Lower Genome Cost and Expand Multiomic Capabilities
PacBio (NASDAQ: PACB), developer of the world's most advanced sequencing technologies, today announced innovations to its Revio and Vega
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Blueresearch @blueresearch.bsky.social · 14/10/2025
thefly.com
PacBio announces innovations to Revio and Vega genome platforms
Reported Tuesday, Oct 14 - 6:16am EDT (TheFly subscription required to read more.)
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Keith Robison @omicsomics.bsky.social · 14/10/2025
PacBio: $300 Genome Via Chemistry Update 🧬🖥️ omicsomics.blogspot.com/2025/10/pacb...
omicsomics.blogspot.com
PacBio: $300 Genome Via Chemistry Update
ASHG is here in Boston, just down the street from Ginkgo's HQ.  I'm in a new role in Ginkgo Automation, trying to convince the NGS world tha...
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Jon Belyeu @jonbelyeu.bsky.social · 09/10/2025
My complex variant visualization tool SVTopo is now officially published in BMC Genomics! link.springer.com/article/10.1.... This tool allows HiFi users to view complex germline structural variation in intuitive and informative plots.
link.springer.com
Complex structural variant visualization with SVTopo - BMC Genomics
Background Structural variants are genomic variants that impact at least 50 nucleotides. Structural variants can play major roles in diversity and human health. Many structural variants are difficult to interpret and understand with existing visualization tools, especially when comprised of inverted sequences or multiple breakend pairs. Results We present SVTopo, a tool to visualize germline structural variants with supporting evidence from high-accuracy long reads in easily understood figures. We include examples of 101 visually complex structural variants from seven unrelated human genomes, manually assigned to ten categories. These demonstrate a broad spectrum of rearrangement and showcase the frequency of complex structural variants in human genomes. Conclusions SVTopo shows breakpoint evidence in ways that aid reasoning about the impact of multi-breakpoint rearrangements. The images created aid human reasoning about the result of structural variation on gene and regulatory regions.
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Matt Holt @holtjma.bsky.social · 06/10/2025
I'm excited to share our pre-print about a new variant benchmarking tool we've been working on for the past few months! Aardvark: Sifting through differences in a mound of variants GitHub: github.com/PacificBiosc... Some highlights in this thread: 1/N
github.com
GitHub - PacificBiosciences/aardvark: A tool for sniffing out the differences in vari-Ants
A tool for sniffing out the differences in vari-Ants - PacificBiosciences/aardvark
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Allison G @assemblerag.bsky.social · 01/10/2025
Most plasmids described in E. coli are small compared to the megaplasmids we identified here! Check out the preprint if you want to learn about these mysterious large elements and their potential functions 🧬. I’m very grateful to have had the opportunity to work on this in @banfieldlab.bsky.social
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Dan Portik @dportik.bsky.social · 01/10/2025
New pre-print from the Banfield lab, highlighting an interesting case of 1.5Mb megaplasmids found in human gut. Plasmid genomes were resolved using #PacBio HiFi sequencing with hifiasm-meta for #metagenome assembly. Host association was detected using epigenetic signals. doi.org/10.1101/2025...
doi.org
Megaplasmids associate with Escherichia coli and other Enterobacteriaceae
Humans and animals are ubiquitously colonized by Enterobacteriaceae , a bacterial family that contains both commensals and clinically significant pathogens. Here, we report Enterobacteriaceae megaplas...
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Jacques Izard @jacquesizard.bsky.social · 28/09/2025
Metagenomics for Microbiology 2nd Ed provides an opportunity to reflect on the growth of the metagenomics field, from new applications to technological advances. The chapters cover methodology, analysis, AI, omics, and more. shop.elsevier.com/books/metage... #microbiome #omics #DataScience
shop.elsevier.com
Metagenomics for Microbiology
Metagenomics for Microbiology, Second Edition unveils the intricate and diverse world of microbial communities, emphasizing their critical roles in he
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Hutlab @hutlab.bsky.social · 17/09/2025
Long and Kelsey just won the 2025 Microbiome SMRT Grant for HiFi shotgun metagenomics!! They will collaborate to optimize PacBio-compatible protocols for gut metagenomics, specifically generating high quality long-read data from IBD patients. Congrats to both! 🎉 🎉 www.pacb.com/blog/2025-mi...
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Jeremy Wilkinson @jewilki.bsky.social · 18/08/2025
@dportik.bsky.social and I wrote a book chapter on highly accurate #longread @pacbio.bsky.social HiFi sequencing for #microbiome and #metagenomic applications in "Metagenomics for Microbiology (Second Edition)" that is now published! Check it out here: www.sciencedirect.com/science/arti...
sciencedirect.com
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PacBio @pacbio.bsky.social · 08/09/2025
The human #microbiome holds enormous potential, but only if we can see it clearly. Join this webinar to learn how #PacBio HiFi sequencing delivers accurate, high-resolution insights with 16S rRNA sequencing and shotgun metagenomics. Secure your spot: bit.ly/4mYmK1G
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Dan Portik @dportik.bsky.social · 10/09/2025
This could be a neat method for species detection in #metagenomic datasets, but why on earth are we simulating PacBio and ONT error rates at >10%? 🫣🤔🫠 PacBio HiFi has had >99% accuracy since 2019. Very hard to interpret the results based on 90% accuracy. www.biorxiv.org/content/10.1...
biorxiv.org
TIPP-SD: A New Method for Species Detection in Microbiomes
In this study, we present TIPP-SD (i.e., TIPP for Species Detection), a new technique for species detection in a microbiome sample. TIPP-SD uses a modified version of TIPP3, which is a recently develo...
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Dan Portik @dportik.bsky.social · 10/09/2025
New #metagenome assembly comparison of PacBio, ONT, and Illumina in human gut #microbiomes. - "HiFi generated more cMAGs than ONT at every depth with either assembly method" - "HiFi cMAGs had significantly higher completeness and lower contamination than ONT" doi.org/10.1016/j.ce...
doi.org
Redirecting
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Elinne Becket, PhD @bielleogy.bsky.social · 25/06/2025
This PacBio lego puzzle was fun! But lorrrrrrdddyyyyy the instructions 🙈🙈🙈
Photo of a completed lego puzzle of the PacBio Vega sequencer next to it's open box with the Vega logo on it
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Jonathan Jacobs @bioinformer.bsky.social · 22/06/2025
#ASMicrobe ❤️ LA // @tallcuppajoe.bsky.social @bielleogy.bsky.social @gfahurbottino.bsky.social @jlgoff.bsky.social @lebetimonas.bsky.social @dportik.bsky.social @jcamthrash.bsky.social @ahoiching.bsky.social @germjuggler.bsky.social @scottnguyen.bsky.social
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Binning Singletons @binningsingletons.com · 21/06/2025
Checking out @pacbio.bsky.social at #ASMicrobe!
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Dan Portik @dportik.bsky.social · 11/06/2025
Very excited to see the long-read #microbiome profiling feature included in this tool! I'll be taking a look at #PacBio HiFi performance in the near future.
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Javier Santoyo @jsantoyo.bsky.social · 11/06/2025
Mapler: A pipeline for assessing assembly quality in taxonomically rich metagenomes sequenced with HiFi reads. #Metagenomics #HiFi #LongReads #Sequencing #GenomeAssembly #Bioinformatics 🧬 🖥️ academic.oup.com/bioinformati...
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Jim Shaw @jimshaw.bsky.social · 28/05/2025
Announcing myloasm, a new long-read (ONT R10/PacBio) metagenome assembler that I've been working on during my postdoc in the Heng Li lab (@lh3lh3.bsky.social). myloasm-docs.github.io
myloasm-docs.github.io
myloasm - metagenomic assembly with (noisy) long reads
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Dan Portik @dportik.bsky.social · 22/05/2025
Great keynote talk at #SFAF by Rob Knight, summarizing key innovations in microbiome research over the past decade. One recent highlight is how long reads have transformed metagenome assembly, particularly #PacBio HiFi reads. The future is complete MAGs!
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Dan Portik @dportik.bsky.social · 22/04/2025
Another great tool from the Computational Biology group at #PacBio. This one helps visualize complex structural variants detected using long reads. Congrats to @jonbelyeu.bsky.social and the rest of the team!
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Dan Portik @dportik.bsky.social · 10/04/2025
Another great #HiFi tool produced by the CompBio group at #PacBio. This one is a big leap forward for structural variants, particularly for long-read sequencing. Congrats to @ctsa.bsky.social and others!
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PacBio @pacbio.bsky.social · 09/04/2025
The University of Bern (@bernomics.bsky.social) is taking sequencing to the next level with #SPRQ chemistry on #Revio. Increased data yield and better quality across diverse samples, like naked mole rats, show how HiFi is changing the game. Blog here: bit.ly/4j5qIDJ #PacBio #PacBioSPRQ
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Dan Portik @dportik.bsky.social · 28/03/2025
Interesting pre-print looking at shallow shotgun #metagenomics with short reads for #metagenome profiling, assembly, and function. Pretty clear limitations, but assembly was particularly bad. Long reads have advantages in all three areas; similar benchmarking approaches would prove useful here.
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Guillaume Méric @gmeric.bsky.social · 25/02/2025
Nice to see good methods being developped for long-reads metagenomic sequencing analyses. This one focuses on attempting to use coverage of long reads to assign AMR genes to host microbial species, something that's pretty hard to do with Illumina atm. Looks promising! www.nature.com/articles/s41...
nature.com
Species-resolved profiling of antibiotic resistance genes in complex metagenomes through long-read overlapping with Argo - Nature Communications
In this study, the authors present ‘Argo’, a bioinformatics tool for identifying the host species for antibiotic resistance genes in long-read metagenomic sequence data. They validate the tool using s...
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Dan Portik @dportik.bsky.social · 31/01/2025
Do you think long-read #metagenomics with #PacBio #HiFi is gaining momentum? I noticed there were more publications & pre-prints on this topic in 2024 (56) than 2022 + 2023 combined (54). Definitely encouraging, and I'm curious to see what 2025 brings! Full pub list: github.com/PacificBiosc...
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Charlie Johnson @biomath.bsky.social · 13/01/2025
Got to checkout the new desktop long read sequencer by @pacbio.bsky.social Very attractive pricing for the box and reagents
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Gabriel Manzo @gabrielmanzo.bsky.social · 13/01/2025
Shoutout to @dportik.bsky.social from #PacBio for an awesome #PAG32 poster presentation! He’s showing how long-read metagenome assembly is creating high-quality MAGs from diverse soil types. Don’t miss Poster 318—amazing work happening here!
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Dan Portik @dportik.bsky.social · 13/01/2025
One concern I've heard for long-read #metagenomic sequencing is the amount of DNA needed. New Ampli-Fi protocol from #PacBio now allows as little as 1ng input for library prep - that's kind of a game changer for low biomass samples.
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