Sahar Melamed
saharmelamed.bsky.social
Sahar Melamed
@saharmelamed.bsky.social
Principal Investigator at the Hebrew University| regulatory small RNAs | RIL-seq | microbiologist | host-pathogen interactions | phages&therapy | antibiotic resistance
Pinned
Happy to join this platform. it is probably makes sense to first introduce our group! We love bacteria and we love RNA! We focus on the role regulatory RNA play in the interaction of bacteria with their surroundings. You can read more about it in our website or here:
www.cell.com/molecular-ce...
Introducing new group leaders: Sahar Melamed
Sahar Melamed spoke with Molecular Cell about his interdisciplinary group at the Hebrew University of Jerusalem, which applies experimental and computational approaches to studying regulatory RNAs in ...
www.cell.com
Reposted by Sahar Melamed
KlebPhaCol paper is now out! Go check it out and see all that we offer.

And when ready, visit our website for more: www.klebphacol.org
November 22, 2025 at 6:19 PM
Reposted by Sahar Melamed
🚨Preprint alert - this is a big one! We transfer the revolutionary power of TnSeq to bacteriophages.

Our HIDEN-SEQ links the "dark matter" genes of your favorite phage to any selectable phenotype, guiding the path from fun observations to molecular mechanisms.

A thread 1/8
November 20, 2025 at 8:40 PM
Cool work by @microberna.bsky.social & Kai Papenfort, presenting the first RNA-RNA map in C. crescentus using RIL-seq, revealing an RNA sponge that controls the transition from nutrient abundance to starvation; new insights into RNA networks and stress responses!
#RNA
www.nature.com/articles/s41...
An RNA sponge directs the transition from feast to famine in Caulobacter crescentus - Nature Communications
In bacteria, many small regulatory RNAs (sRNAs) associate with the RNA chaperone Hfq to modulate gene expression at the post-transcriptional level. Here, the authors identify global Hfq-mediated RNA-R...
www.nature.com
October 30, 2025 at 1:43 PM
Reposted by Sahar Melamed
🔬 To celebrate World Phage Week, this month's issue of the Phage Collection Blog, written by Hana, explores the history of phage therapy. Thanks to @danielarothschild.bsky.social for providing the cover image, showcasing phage ROTH78.

#WorldPhageWeek

www.phage-collection.org/blog/history...
History of Phage Therapy — ThePhageCollectionProject
Phage therapy is not a recent discovery; it dates back to the early 20th century, with two scientists making impactful discoveries within two years of each other. But research priorities shifted towar...
www.phage-collection.org
October 28, 2025 at 5:30 PM
Reposted by Sahar Melamed
CDC reports that the 'nightmare bacteria' with the NDM gene infections rose ~ 70% from 2019–2023 & is resistant to almost all antibiotics.

At GARDP, Shionogi’s approved antibiotic cefiderocol & Bugworks’ BWC0977, now in clinical development, show activity against it.

🔗Read: bit.ly/4pFG05H
‘Nightmare bacteria’ cases are increasing in the U.S.
It’s likely that many people are unrecognized carriers of the drug-resistant bacteria, which could lead to community spread, CDC scientists said.
bit.ly
September 26, 2025 at 6:00 AM
PhD students! Curious about RNA biology, phages & interbacterial interactions? Come spend 3–4 months in my lab through the Azrieli International Visiting PhD Fellowship (ILS 12K/month). Collaborate and experience science & culture together!
azrielifoundation.org/azrieli-fell...
Call for Applications for the Azrieli International Visiting PhD Fellowship - The Azrieli Foundation
The Azrieli International Visiting PhD Fellowship offers outstanding international PhD candidates the opportunity to conduct short-term research in Israel, fostering academic collaboration and strengt...
azrielifoundation.org
September 15, 2025 at 9:43 AM
Wonderful department retreat yesterday! Proud of Hila Robard’s excellent talk about Pseudomonas aeruginosa small RNAs and their physiological impacts!
Big thanks for the organizers Gideon Mamou and Yiska Weisblum!
September 9, 2025 at 4:12 AM
The Melamed and Altuvia labs are on their way to the Meeting on Regulating with RNA in Bacteria and Archaea in #Strasbourg !!! Excited meet old friends and make new ones
#RNA
September 1, 2025 at 11:23 AM
A new cool method developed by the Balaban lab, Microcolony-seq.
A new way to track bacterial phenotypic inheritance, revealing hidden subpopulations in infections.

www.cell.com/cell/fulltex...
Uncovering phenotypic inheritance from single cells with Microcolony-seq
Microcolony-seq systematically uncovers inherited phenotypic diversity directly from infected human samples, revealing that bacteria can retain long-term genetic and nongenetic memory from the host en...
www.cell.com
August 28, 2025 at 10:28 AM
Reposted by Sahar Melamed
tRNA modification profiling reveals epitranscriptome regulatory networks in Pseudomonas aeruginosa 🦠👏High-throughput tRNA epitranscriptome profiling using mass spec on P. aeruginosa transposon insertion library and links with metabolic networks #microsky #rnasky doi.org/10.1093/nar/...
tRNA modification profiling reveals epitranscriptome regulatory networks in Pseudomonas aeruginosa
Abstract. Transfer RNA (tRNA) modifications have emerged as critical post-transcriptional regulators of gene expression affecting diverse biological and di
doi.org
July 28, 2025 at 8:28 PM
I enjoyed attending the annual Israel Society for Microbiology (ISM) meeting. This year held special significance in honoring the memory of two esteemed faculty members, Prof. Herve Bercovier and Prof. Hanna Engelberg-Kulka, who sadly passed away over the past year.
July 24, 2025 at 4:19 AM
Reposted by Sahar Melamed
This is wild!
Engineering E. coli bacteria to turn plastic waste into paracetamol (Tylenol)
www.nature.com/articles/s41...
www.nature.com/articles/s41...
June 23, 2025 at 6:55 PM
Just signed up for the Microbial RNA Meeting! Really looking forward to a few days packed with small RNAs, and catching up with people. Always one of the most inspiring and fun meetings on the calendar 🙂
microbialrnameeting.com

#MicrobialRNA
Microbes & RNA 2025 – 8th Meeting on Regulating with RNA in Bacteria and Archaea
microbialrnameeting.com
May 27, 2025 at 4:22 AM
Reposted by Sahar Melamed
🫴 Wow: A bacterial reverse transcriptase synthesizes long poly-A–rich cDNA for anti phage defense:

👇👇👇

@science.org

www.science.org/doi/10.1126/...
Bacterial reverse transcriptase synthesizes long poly-A–rich cDNA for antiphage defense
Prokaryotic defense-associated reverse transcriptases (DRTs) were recently identified with antiviral functions; however, their functional mechanisms remain largely unexplored. Here we show that DRT9 f...
www.science.org
May 21, 2025 at 3:26 AM
Pizza break on the scenic rooftop of the Hebrew University Faculty of Medicine library with the Melamed and Altuvia labs! @hebrewuniversity.bsky.social
May 16, 2025 at 11:27 AM
Interesting study shows CsrA forms a dynamic, membraneless compartment with sRNAs, mRNAs & the degradosome in E. coli, flipping its role between activating and repressing virulence. A new layer of RNA-based regulation! #microbiology #RNA #CsrA

www.nature.com/articles/s41...
Formation of a membraneless compartment regulates bacterial virulence - Nature Communications
The RNA-binding protein CsrA switches from upregulation to downregulation of virulence genes in bacteria through unclear mechanisms. Here, the authors show that the switch between promoting and repres...
www.nature.com
April 25, 2025 at 9:10 AM
One of my students pointed me to this great podcast that gives an overview of phage history!
#PhageSky

open.spotify.com/episode/4XTa...
Bacteriophages
In Our Time · Episode
open.spotify.com
April 24, 2025 at 7:17 AM
Reposted by Sahar Melamed
I'm happy to share the first publication from my lab @hoerlab.bsky.social, now out in @narjournal.bsky.social! I take a look at the biology of RNA phages, focusing on how meta-omics methods are discovering new RNA phage families and bacterial defense strategies.

#PhageSky

doi.org/10.1093/nar/...
Advancing RNA phage biology through meta-omics
Abstract. Bacteriophages with RNA genomes are among the simplest biological entities on Earth. Since their discovery in the 1960s, they have been used as i
doi.org
April 23, 2025 at 8:57 AM
Reposted by Sahar Melamed
🚨Jeremy Barr discusses how he began studying #bacteriophages, the historic use of the T-series #phages, and how they have shaped the field.

#MicroSky #PhageSky

www.nature.com/articles/s41...
The T-series bacteriophages are reductionist models that continue to shape the field - Nature Microbiology
Jeremy Barr discusses how he began studying bacteriophages, the historic use of the T-series phages and how they have shaped the field.
www.nature.com
April 14, 2025 at 11:23 AM
Reposted by Sahar Melamed
Some say, important sRNAs can be recognized by having their own “sponge” 🧽. Well, here comes InvS: a sponge of PinT (and vice versa). Congrats to @kooshapour.bsky.social and @ginlaca.bsky.social on their great work! doi.org/10.1101/2025...
Intramacrophage RIL-seq uncovers an RNA antagonist of the Salmonella virulence-associated small RNA PinT
Salmonella virulence chiefly relies upon two major pathogenicity islands, SPI-1 and SPI-2, which enable host cell invasion and intracellular survival, respectively. There has been increasing evidence ...
doi.org
April 10, 2025 at 8:06 AM
Reposted by Sahar Melamed
If you want to do single-cell RNA-seq on your favourite bacterium, here‘s our detailed Nature Protocol for microbial MATQ-seq. It profiles up to 600 genes in a single bacterial cell!

www.nature.com/articles/s41...
Transcriptomic profiling of individual bacteria by MATQ-seq - Nature Protocols
Bacterial single-cell sequencing via MATQ-seq combines index sorting, random priming and rRNA depletion, and offers high cell retention and transcript capture rates, making it ideal for experiments wi...
www.nature.com
April 9, 2025 at 9:15 AM
Reposted by Sahar Melamed
And here it is, the completed BASEL collection finally published as early access in @plosbiology.org - see the thread for more details. 🤗🧬🎣
April 8, 2025 at 4:59 AM