Liz Ortiz de Ora
@ortizdeora.bsky.social
Microbiologist. Wholobiontist. Molecular and Cell Biologist. Interested in illuminating the invisible connections of the gut microbiome within cross-kingdom interactions.
Congratulations to Ben Morehouse @benmorehouse.bsky.social and the other 2026 Michelson Prize Awardees. All five newly funded projects are incredibly exciting areas of immunology! www.michelsonmedicalresearch.org/news/michels...
When viral infection is not an excuse to stop moving!
Now published in PLoS Pathogens! #microsky #phagesky journals.plos.org/plospathogen...
🚨New paper! A prophage-encoded sRNA limits lytic phage infection in adherent-invasive E. coli. Huge thanks to members of the Round Lab, @duerkoplab.bsky.social, Wiedenheft Lab, and phage legend Sherwood Casjens. #microsky 🦠🧫🧪🧬 www.biorxiv.org/content/10.1...
A prophage-encoded sRNA limits phage infection of adherent-invasive E. coli #PLoSPathogen from @prsecor.bsky.social journals.plos.org/plospathogen...
A prophage-encoded sRNA limits phage infection of adherent-invasive E. coli
Author summary Prophages—viral genomes integrated into bacterial chromosomes—are common in enteric bacteria and can profoundly influence bacterial physiology and ecological fitness. Here we show that ...
journals.plos.org
Live microscopy to 'phollow' phage outbreaks 🔬✳️ www.nature.com/articles/s41...
Phollow reveals in situ phage transmission dynamics in the zebrafish gut microbiome at single-virion resolution - Nature Microbiology
‘Phollow’ is a live imaging-based fluorescence tagging approach that can track phage replication and spread in situ with single-virion resolution.
nature.com
As the year ends, we decided to select our favorite papers of 2025 Turns out, it is impossible as we love them all! So, we picked 'some' that exhibit the range of microbiology highlighted through the columns of Nature Microbiology. Here is a glimpse into #EditorPicks of 2025 #MicroSky 🦠
Expression level of anti-phage defence systems controls a trade-off between protection range and autoimmunity By Nitzan Aframian and Avigdor Eldar. www.nature.com/articles/s41...
Expression level of anti-phage defence systems controls a trade-off between protection range and autoimmunity - Nature Microbiology
The authors examine several defense systems and find that increased expression enhances their protection range, albeit at a cost of autoimmunity.
nature.com
1/16 New pre-print from the Sternberg Lab! We uncover how temperate phages can use RNA-guided transcription factors to remodel the flagellar composition of their bacterial host and enhance their fitness. Find the preprint and full story here: tinyurl.com/mshwjd77
We took the day off from the lab and spent all day in Paradise Valley, Montana on the Yellowstone River
E. coli prophages encode an arsenal of defense systems to protect against temperate phages: Cell Host & Microbe www.cell.com/cell-host-mi...
E. coli prophages encode an arsenal of defense systems to protect against temperate phages
Bacteria contain an array of immune systems, with many yet to be discovered. Brenes and Laub isolate temperate phages from diverse E. coli strains, enabling identification of 17 conserved, prophage-en...
cell.com
🤯
🚨New paper! A prophage-encoded sRNA limits lytic phage infection in adherent-invasive E. coli. Huge thanks to members of the Round Lab, @duerkoplab.bsky.social, Wiedenheft Lab, and phage legend Sherwood Casjens. #microsky 🦠🧫🧪🧬 www.biorxiv.org/content/10.1...
We’re thrilled to be featured on the May cover of Nature Microbiology... And our Research Briefing is out now—check it out, it’s 🔥! www.nature.com/articles/s41...
‘Phollowing’ phage outbreaks in microbiomes with live fluorescence microscopy - Nature Microbiology
Phollow is an in vivo tagging approach for marking bacteriophages with fluorescent proteins while new virions are assembled in bacteria, enabling direct observation of phage outbreaks with single-viri...
nature.com
"Phollow" the link to our May issue to read about... 💥lysing bacterial pathogens ⛽microbial alkane oxidation 🌱importance of seed-borne bacteria 🙅♀️protective antibodies for norovirus 🚰E. coli in urban drinking water ...and more!👇 www.nature.com/nmicrobiol/v...
🚨OUT NOW 🚨 Phollow Reveals In Situ Phage Transmission Dynamics in the Zebrafish Gut Microbiome at Single-Virion Resolution 🦠🐟 #MicroSky #MicrobiomeSky www.nature.com/articles/s41...
Phollow reveals in situ phage transmission dynamics in the zebrafish gut microbiome at single-virion resolution - Nature Microbiology
‘Phollow’ is a live imaging-based fluorescence tagging approach that can track phage replication and spread in situ with single-virion resolution.
nature.com
I am thrilled to share the first manuscript from the Wiles lab! We present "Phollow", an in vivo phage-tagging approach that enables direct observation of phage outbreaks with single-virion resolution by live imaging. Here some highlights 👇 www.nature.com/articles/s41...
Phollow reveals in situ phage transmission dynamics in the zebrafish gut microbiome at single-virion resolution
Nature Microbiology - ‘Phollow’ is a live imaging-based fluorescence tagging approach that can track phage replication and spread in situ with single-virion resolution.
nature.com
Legitmately thrilled to share our latest work, in which @fernpizza.bsky.social solved an experimental challenge in plasmid biology as old as the field: measuring how plasmids compete and evolve within individual cells!
I'm so happy that I can finally share the results of my first postdoc paper with @baym.lol!!! Turns out plasmids are an amazing system to study multi-scale evolution and we can track within-cell and between-cell dynamics! (1/n) www.biorxiv.org/content/earl...
Curious about how the gut microbiome modulates the neurological health of pregnant women and their offspring? Check out my recent review with @pipethero.bsky.social out now @jclinical-invest.bsky.social! 🦠🤰👶🧠 www.jci.org/articles/vie...
JCI - The microbiome as a modulator of neurological health across the maternal-offspring interface
jci.org
Working link: journals.asm.org/doi/10.1128/...
Phage reprogramming of Pseudomonas aeruginosa amino acid metabolism drives efficient phage replication | mBio
Bacterial viruses, known as phages, are abundant in all environments that are inhabited by bacteria. During the infection process, phages exploit bacterial resources, resulting in notable changes to b...
journals.asm.org
Published on my birthday 🎉 Another paper in collaboration with @themaxwelllab.bsky.social Phage reprogramming of Pseudomonas aeruginosa amino acid metabolism drives efficient phage replication doi.org/10.1128/mbio... 🦠🧫🧪🧬
In the literature of domestication and microbiomes there seems to be the expectation that: domestication should lead to the loss of microbiome diversity and host-control. Alejandra Hernandez-Teran and I were both skeptical of both, so we decided to see what we know so far (1/6) shorturl.at/FHY9H
Plant domestication does not reduce diversity in root microbiomes
Domestication has profoundly shaped human civilization and the genetic makeup of numerous plant and animal species. While the effects of plant domestication at the genetic and phenotypic levels are well-documented, its impact on plant microbiome remains less understood. Root microbiomes play crucial roles in nutrient acquisition, pathogen defense, and biotic stress tolerance, yet the influence of domestication on their diversity and assembly is still debated. Two primary hypotheses have been proposed: 1) the reduction in microbial diversity resulting from the domestication process, and 2) the diminished ability of host plants to control their microbiomes. To evaluate these hypotheses, we conducted a meta-analysis of multiple crops, comparing the root microbiomes of domesticated plants and their wild relatives. Our results indicate that the effects of domestication are species-specific and context-dependent, with most domesticated plants exhibiting increased microbial diversity and more structured communities, while others show no significant change. Overall, this study provides evidence that plant domestication does not lead to a uniform reduction in microbial diversity or a consistently diminished ability of plants to influence their microbiomes. Based on these findings, we discuss new perspectives and the need for future studies incorporating native soils and host genetic variation in such experiments, analyzing not only diversity but also microbiome function, and considering how root morphology might affect microbiome recruitment. Finally, we highlight the need for research on the potential adaptive or maladaptive consequences that introgression between wild and domesticated plants could have from a microbiome perspective. ### Competing Interest Statement The authors have declared no competing interest.
doi.org
So Excited to share the newest @biorxivpreprint preprint from the #Nicholaslab Congrats Naveena my 1st #gradstudent on this work. T cells are necessary for development of PCOS reproductive symptoms in a letrozole-induced mouse model of PCOS | bioRxiv www.biorxiv.org/content/10.1...
T cells are necessary for development of PCOS reproductive symptoms in a letrozole-induced mouse model of PCOS
Polycystic ovary syndrome (PCOS) is a complex condition with clear genetic susceptibilities that impact the heterogeneous clinical presentation of symptoms and severity through unknown mechanisms. Chr...
biorxiv.org
Thursday! Time for a new #MattersMicrobialepisode! Episode #73 with with Dr. Travis Wiles of UC Irvine about directly visualizing the dynamics of the gut microbiome! Filled with #OMG and #WTM moments. PLEASE spread the #GoodMicrobialWord! @bunsen_B @microbe.tv youtu.be/P9UExZIjH_M?...
Friends, please help spread the word about our microbiology REU program at Montana State University. www.montana.edu/mbi/reu/ Each student receives a stipend ($7000 for 10 wks). Travel compensation, room, and board are also provided. Details in the attached pic--Feb 13 deadline 🧫🧪🦠#microsky
Just finished recording Episode #73 of #MattersMicrobial with Dr. Travis Wiles of UC Irvine. Such an exciting conversation about visualizing the microbiome and observing changes in real time. Wow. @bunsenb @univpugetsound @ASMicrobiology
Pervasive phosphorylation by phage T7 kinase disarms bacterial defenses https://www.biorxiv.org/content/10.1101/2024.12.20.629319v1
Keeping your symbiosis genes on a plasmid is a smart move if you have multiple potential hosts. Here a gut bacterial symbiont, but same is true for N-fixing Rhizobia. www.science.org/doi/10.1126/...
A conserved bacterial genetic basis for commensal-host specificity
Animals selectively acquire specific symbiotic gut bacteria from their environments that aid host fitness. To colonize, a symbiont must locate its niche and sustain growth within the gut. Adhesins are...
science.org