Using Microbiology and Bioinformatics to discover how the bacteria that live in our mouth impact health and disease. Tweets my own.
Joined November 2020
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122 Photos and videos
OHSU published an article about my lab's research!
#microbiology #dentistry #bioinformatics
news.ohsu.edu/2026/05/05/ohs…
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Jonathon Baker, Ph.D. retweeted
Apr 30
"This is the first synthetic species,” microbiologist J. Craig Venter told 60 Minutes’ Steve Kroft in 2010. His team of scientists created a synthetic bacteria designed on a computer, with man-made DNA. Venter says that from concept to completion, it took 15 years and $40 million to make.
Venter, who died this week at 79, was one of the most famous scientists in the world, known for his pioneering work in deciphering the human genetic code.
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J. Craig Venter (1946-2026)
Polarizing, but an absolute science rock star who drove some of the most significant scientific accomplishments in my lifetime. Forever grateful and proud to have spent 5 formative years learning #bioinformatics while working for
@JCVenterInst
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New preprint! Using cutting edge epigenomics, we comprehensively identified DNA methylation in the model oral pathogen Streptococcus mutans UA159 and uncovered its three distinct sources. #microbiology #dentistry
biorxiv.org/content/10.64898…
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We found methylation in UA159 at:
1️⃣ GATC via DpnII
2️⃣ CGANNNNNNNTCY via HsdM (previously unstudied in S. mutans)
3️⃣ CTGNAG via DnmA—both the gene and motif were discovered in this study
Deletion of any of these systems resulted in a complete loss of the cognate methylation.
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Importantly, all three methylation systems appear to contribute to pathogenicity, as their loss leads to reduced virulence associated traits.
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Congratulations to our NIH R25 DORS Intern Sadie Drucker who presented her research this week at the International Association for Dental Research conference in San Diego, and is a Finalist for the Cariology Research Group Student Research Award! Way to go Sadie! #microbiology
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Matthew Barbisan and Mingzhe Guo did a great job presenting some of their research in our lab at OHSU School of Dentistry Research Day 2026! #microbiology #dentistry
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Today at the OHSU School of Dentistry AI in Research Symposium, I presented that AI is a major driver of advances in third-generation sequencing technologies (e.g., Nanopore and PacBio). Our lab is using Nanopore sequencing to study DNA/RNA modifications in oral bacteria.
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Epigenomics and epitranscriptomics, the next revolution enabled by third-generation sequencing. Our lab used nanopore sequencing to characterize the epigenome of the model pathogen Streptococcus mutans UA159 at single-nucleotide resolution, revealing 3 types of methylation.
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There were 3 main sources of 6mA:
1) at GATC via DpnII (motif/genes known; PMID 39624001)
2) at CGANNNNNNNTCY via HsdM (characterized in other species, but not S. mutans, novel recognition motif)
3) at the novel motif CTGNAG via a currently unknown gene
Preprint soon
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23 Dec 2025
New publication! In this intra-departmental collaboration, we report phenotypic and genotypic differences between species of oral Corynebacteria.
#microbiology #dentistry
journals.asm.org/doi/10.1128…
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17 Dec 2025
Very pleased to share that our recent article in Nature Communications was selected for the Editor's Highlights, which aims to showcase the 50 best papers recently published in the area of #microbiology & infectious diseases! @JWVeening @vincentdebakker
nature.com/collections/jedgc…
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25 Nov 2025
New Publication! In collaboration with Jan-Willem Veening at Univ. de Lausanne, we used multi-omics to examine the response of Streptococcus pneumoniae to infection-mimicking conditions, discovering a novel regulator of membrane fatty acid composition.
nature.com/articles/s41467-0…
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25 Nov 2025
fasR (spv0647) is a transcriptional regulator, a ∆fasR strain grew poorly at higher temperature (mimicking fever), reduced unsaturated fatty acids, and reduced expression of fabM, fakB3, and bioY-all involved in fatty acid synthesis and/or utilization.
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22 Nov 2025
Molly Burnside from our lab did an amazing job presenting her research on Corynebacterium at the 2025 @ASMicrobiology Conference on Biofilms. Molly is applying to PhD programs this fall, and she is going to have a huge amount of success wherever she decides to go!
#Microbiology
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18 Oct 2025
With my colleague Dr. Jens Kreth representing OHSU and the USA at what was a fantastic conference!
#microbiology #dentistry #immunology
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13 Sep 2025
After spending 7 months earlier this year visiting our lab at OHSU on a scholarship, Dr. Felipe Farias da Silva recently presented his work with us at the 2025 meeting of the Brazilian Society of Dental Research. Way to go Felipe! #microbiology #dentistry
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21 Aug 2025
This summer, we hosted Sadie Drucker (Scripps Coll.) and Michelle Lee (Oregon State Univ.), through our NIH-funded DORS program. They did an amazing job, and Sadie won Best Poster at the OHSU Summer Internship Symposium! We wish them the best on the next step in their careers!
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