Liana Merk
@bacteriyay.bsky.social
PhD student in Sean Eddy’s lab! I like introns, phage, fermentation, and stamps.
Pinned
Liana Merk
@bacteriyay.bsky.social
· May 24
Prevalence of Group II Introns in Phage Genomes
Although bacteriophage genomes are under strong selective pressure for high coding density, they are still frequently invaded by mobile genetic elements (MGEs). Group II introns are MGEs that reduce h...
www.biorxiv.org
(1/7) Very excited to share my first PhD preprint on the interactions of two of my favorite mobile genetic elements: phages and group II introns!
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
Reposted by Liana Merk
Super excited that the bulk of my PhD work is now preprinted! Here we used whole-community competition, or coalescence, experiments to quantify selection acting on genetically diverged strains within larger communities. (1/n)
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
www.biorxiv.org
November 11, 2025 at 5:15 PM
Super excited that the bulk of my PhD work is now preprinted! Here we used whole-community competition, or coalescence, experiments to quantify selection acting on genetically diverged strains within larger communities. (1/n)
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
Reposted by Liana Merk
Been working on a really strange retron bacterial immune system, here's the preprint: www.biorxiv.org/content/10.1...
Type VI retrons are unlike any other. Phage infection triggers reverse transcription of a DNA fragment that activates translation of a toxin to kill the infected cell.
Type VI retrons are unlike any other. Phage infection triggers reverse transcription of a DNA fragment that activates translation of a toxin to kill the infected cell.
October 23, 2025 at 6:49 PM
Been working on a really strange retron bacterial immune system, here's the preprint: www.biorxiv.org/content/10.1...
Type VI retrons are unlike any other. Phage infection triggers reverse transcription of a DNA fragment that activates translation of a toxin to kill the infected cell.
Type VI retrons are unlike any other. Phage infection triggers reverse transcription of a DNA fragment that activates translation of a toxin to kill the infected cell.
Reposted by Liana Merk
1/10 Genome maintenance by telomerase is a fundamental process in nearly all eukaryotes. But where does it come from?
Today, we report the discovery of telomerase homologs in a family of antiviral RTs, revealing an unexpected evolutionary origin in bacteria.
www.biorxiv.org/content/10.1...
Today, we report the discovery of telomerase homologs in a family of antiviral RTs, revealing an unexpected evolutionary origin in bacteria.
www.biorxiv.org/content/10.1...
Antiviral reverse transcriptases reveal the evolutionary origin of telomerase
Defense-associated reverse transcriptases (DRTs) employ diverse and distinctive mechanisms of cDNA synthesis to protect bacteria against viral infection. However, much of DRT family diversity remains ...
www.biorxiv.org
October 17, 2025 at 5:22 PM
1/10 Genome maintenance by telomerase is a fundamental process in nearly all eukaryotes. But where does it come from?
Today, we report the discovery of telomerase homologs in a family of antiviral RTs, revealing an unexpected evolutionary origin in bacteria.
www.biorxiv.org/content/10.1...
Today, we report the discovery of telomerase homologs in a family of antiviral RTs, revealing an unexpected evolutionary origin in bacteria.
www.biorxiv.org/content/10.1...
Reposted by Liana Merk
RNA Structure beyond Canonical Base Pairs Guided by Evolution 🧪🧬 #AcademicSky #higherEd
www.mcb.harvard.edu/department/n... @rivaselenarivas.bsky.social @rachellegaudet.bsky.social @cryptogenomicon.bsky.social @dulaclab.bsky.social @neurovenki.bsky.social @naoshigeuchida.bsky.social
www.mcb.harvard.edu/department/n... @rivaselenarivas.bsky.social @rachellegaudet.bsky.social @cryptogenomicon.bsky.social @dulaclab.bsky.social @neurovenki.bsky.social @naoshigeuchida.bsky.social
RNA Structure beyond Canonical Base Pairs Guided by Evolution - Harvard University - Department of Molecular & Cellular Biology
In addition to messenger RNA (mRNA) that provide the code for proteins, there are other RNAs that exert their function just as RNA, usually referred to as non-coding […]
www.mcb.harvard.edu
October 7, 2025 at 10:37 PM
RNA Structure beyond Canonical Base Pairs Guided by Evolution 🧪🧬 #AcademicSky #higherEd
www.mcb.harvard.edu/department/n... @rivaselenarivas.bsky.social @rachellegaudet.bsky.social @cryptogenomicon.bsky.social @dulaclab.bsky.social @neurovenki.bsky.social @naoshigeuchida.bsky.social
www.mcb.harvard.edu/department/n... @rivaselenarivas.bsky.social @rachellegaudet.bsky.social @cryptogenomicon.bsky.social @dulaclab.bsky.social @neurovenki.bsky.social @naoshigeuchida.bsky.social
Reposted by Liana Merk
You’ve heard of ubiquitination, meet deazaguanylation: Doug Wassarman in our lab discovered phage defense pathways have co-opted Q nucleobase biosynthetic enzymes to catalyze a new form of protein conjugation chemistry @science.org
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
September 25, 2025 at 7:16 PM
You’ve heard of ubiquitination, meet deazaguanylation: Doug Wassarman in our lab discovered phage defense pathways have co-opted Q nucleobase biosynthetic enzymes to catalyze a new form of protein conjugation chemistry @science.org
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Reposted by Liana Merk
What was antibiotic resistance like before we ever used antibiotics? How did we change what antibiotic resistance genes looked like over 100 years?
Our paper looking at resistance genes from a century of NCTC historical isolates now out in mGen:
www.microbiologyresearch.org/content/jour...
Our paper looking at resistance genes from a century of NCTC historical isolates now out in mGen:
www.microbiologyresearch.org/content/jour...
Genomic resistance in historical clinical isolates increased in frequency and mobility after the age of antibiotics
Antibiotic resistance is frequently observed shortly after the clinical introduction of an antibiotic. Whether and how frequently that resistance occurred before the introduction is harder to determin...
www.microbiologyresearch.org
September 1, 2025 at 5:49 PM
What was antibiotic resistance like before we ever used antibiotics? How did we change what antibiotic resistance genes looked like over 100 years?
Our paper looking at resistance genes from a century of NCTC historical isolates now out in mGen:
www.microbiologyresearch.org/content/jour...
Our paper looking at resistance genes from a century of NCTC historical isolates now out in mGen:
www.microbiologyresearch.org/content/jour...
Reposted by Liana Merk
Phage DisCo! Our targeted phage discovery method in press today: journals.asm.org/doi/10.1128/...
Perfectly timed with our four summer undergrad's first successful phage hunt... disco lights in the lab to mark the occasion 🕺
Perfectly timed with our four summer undergrad's first successful phage hunt... disco lights in the lab to mark the occasion 🕺
May 28, 2025 at 10:34 PM
Phage DisCo! Our targeted phage discovery method in press today: journals.asm.org/doi/10.1128/...
Perfectly timed with our four summer undergrad's first successful phage hunt... disco lights in the lab to mark the occasion 🕺
Perfectly timed with our four summer undergrad's first successful phage hunt... disco lights in the lab to mark the occasion 🕺
Reposted by Liana Merk
My father worked in a tire factory in Appalachia. Friends and family in the military. Used to vote Republican. Got into college on a diversity program for the underprivileged. Ended up a Harvard professor. And now my funding is terminated because we're trying to stick it to the elites.
May 28, 2025 at 3:07 PM
My father worked in a tire factory in Appalachia. Friends and family in the military. Used to vote Republican. Got into college on a diversity program for the underprivileged. Ended up a Harvard professor. And now my funding is terminated because we're trying to stick it to the elites.
Reposted by Liana Merk
The war on science in the US is already having an effect on private sector research like AlphaFold. Bears repeating but the private sector builds on top of things created by academic research for the public good. This hurts everyone.
May 28, 2025 at 10:18 AM
The war on science in the US is already having an effect on private sector research like AlphaFold. Bears repeating but the private sector builds on top of things created by academic research for the public good. This hurts everyone.
(1/7) Very excited to share my first PhD preprint on the interactions of two of my favorite mobile genetic elements: phages and group II introns!
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
Prevalence of Group II Introns in Phage Genomes
Although bacteriophage genomes are under strong selective pressure for high coding density, they are still frequently invaded by mobile genetic elements (MGEs). Group II introns are MGEs that reduce h...
www.biorxiv.org
May 24, 2025 at 7:20 PM
(1/7) Very excited to share my first PhD preprint on the interactions of two of my favorite mobile genetic elements: phages and group II introns!
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
Reposted by Liana Merk
Final grad paper is officially out! Grateful for the incredible team and all the support along the way!
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Tick-borne flavivirus exoribonuclease-resistant RNAs contain a double loop structure - Nature Communications
Many flaviviruses generate specialized non-coding RNAs that resist degradation by host exonucleases, promoting viral infection. Here, the authors characterize an RNA element in Powassan virus, highlig...
www.nature.com
May 15, 2025 at 10:00 PM
Final grad paper is officially out! Grateful for the incredible team and all the support along the way!
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Liana Merk
Super excited to share a new preprint from our lab on design of small-molecule binding proteins using neural networks! The paper has a bit of everything. A new graph neural network, new design algorithms, and experimental validation. www.biorxiv.org/content/10.1...
🧵🧪
🧵🧪
Zero-shot design of drug-binding proteins via neural selection-expansion
Computational design of molecular recognition remains challenging despite advances in deep learning. The design of proteins that bind to small molecules has been particularly difficult because it requ...
www.biorxiv.org
April 28, 2025 at 3:22 PM
Super excited to share a new preprint from our lab on design of small-molecule binding proteins using neural networks! The paper has a bit of everything. A new graph neural network, new design algorithms, and experimental validation. www.biorxiv.org/content/10.1...
🧵🧪
🧵🧪
Reposted by Liana Merk
Llamas, dolphins and measles? Oh my!
So thankful this story is finally breaking containment from my time in the Manguso Lab at the Broad. Using pieces from viruses and llamas we engineered selective cell specific viral like particles with reduced immunogenicity for in vivo gene delivery
So thankful this story is finally breaking containment from my time in the Manguso Lab at the Broad. Using pieces from viruses and llamas we engineered selective cell specific viral like particles with reduced immunogenicity for in vivo gene delivery
April 24, 2025 at 9:59 PM
Llamas, dolphins and measles? Oh my!
So thankful this story is finally breaking containment from my time in the Manguso Lab at the Broad. Using pieces from viruses and llamas we engineered selective cell specific viral like particles with reduced immunogenicity for in vivo gene delivery
So thankful this story is finally breaking containment from my time in the Manguso Lab at the Broad. Using pieces from viruses and llamas we engineered selective cell specific viral like particles with reduced immunogenicity for in vivo gene delivery
Reposted by Liana Merk
rnahub.og
A webserver to generate RNA alignments with secondary structure assessment
www.biorxiv.org/content/10.1...
A webserver to generate RNA alignments with secondary structure assessment
www.biorxiv.org/content/10.1...
March 16, 2025 at 12:24 PM
rnahub.og
A webserver to generate RNA alignments with secondary structure assessment
www.biorxiv.org/content/10.1...
A webserver to generate RNA alignments with secondary structure assessment
www.biorxiv.org/content/10.1...
Reposted by Liana Merk
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...
(1/n) www.biorxiv.org/content/earl...
Intracellular competition shapes plasmid population dynamics
Conflicts between levels of biological organization are central to evolution, from populations of multicellular organisms to selfish genetic elements in microbes. Plasmids are extrachromosomal, self-r...
www.biorxiv.org
February 21, 2025 at 8:36 PM
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...
(1/n) www.biorxiv.org/content/earl...