Abhishek Chatterjee

Abhishek Chatterjee

@achemsynbio.bsky.social

Professor @BostonCollege Chemical Biology, Synthetic Biology, Directed Evolution, Expanding the genetic code https://sites.google.com/a/bc.edu/thechatterjeelab/home https://scholar.google.com/citations?user=zeSNxNcAAAAJ&hl=en

2.1K followers1.1K following68 posts

Abhishek Chatterjee reposted

Abhishek Chatterjee reposted

We found a viral Trojan Horse: a virus can hide inside another virus.This one surprised us: deltaviruses don’t just borrow a helper virus. They can travel inside it. A literal Trojan Horse “virus-in-a-virus” route into cells. 🤯 Kudos to 1st author @viroscope.bsky.social and co-authors !

sciencedirect.comDeltaviruses spread through a viral Trojan HorseHepatitis D-like satellite viruses, known as deltaviruses, have been recently discovered in a wide range of animals. These viruses are thought to expr…

Chintan's work demonstrating the efficient incorporation of non-α-amino acid backbones into proteins expressed in both E. coli and mammalian cells just came out! A great collaborative effort from @cgemcci.bsky.social! pubs.acs.org/doi/10.1021/...

pubs.acs.orgCo-Translational Incorporation of (R)- and (S)-β2-Hydroxyacids In Vivo: Directed Evolution of Efficient Aminoacyl-tRNA SynthetasesExpanding the genetic code of living cells with noncanonical monomers (ncMs) relies on engineered aminoacyl-tRNA synthetases (aaRS) and their cognate tRNAs. Conventional aaRS engineering strategies rely on translation-dependent selection systems, limiting their utility for ncMs that are poorly accommodated by the native translational machinery. To address this limitation, we recently developed START, a translation-independent platform that selects Methanomethylophilus alvus pyrrolysyl-synthetase (MaPylRS) mutants based on their ability to acylate cognate tRNAMaPyl. START uses barcoded tRNAs to encode the identity of distinct aaRS mutants in a library. Acylation by active aaRS mutants protects the corresponding tRNAs from periodate oxidation, and their identity is retrieved subsequently through sequencing. START was previously applied to genetically encode noncanonical α-amino acids. Here, we successfully applied START to engineer MaPylRS mutants capable of acylating tRNAMaPyl with diverse non-α-amino acid substrates with good efficiency and fidelity, including (R) and (S) enantiomers of a β2-hydroxy acid, a β2-amino acids, and a malonate. Several mutants exhibit notable polyspecificity across noncanonical backbones while maintaining selectivity against their α-amino acid counterparts. Using these novel enzymes, we demonstrate the ribosomal incorporation of both (R)- and (S)-β2-hydroxy acids into a luciferase reporter protein expressed in Escherichia coli with good efficiency and fidelity. These results imply that highly active engineered aaRS/tRNA pairs can overcome the recently established limitations of EF-Tu with respect to non-α-amino acid substrates. The engineered MaPylRS mutants also enabled the successful incorporation of both (R)- and (S)-β2-hydroxy acids into a protein expressed in mammalian cells, demonstrating for the first time that eukaryotic translation can accommodate non-α-backbones.

Starting 2026 with Quan Pham's paper expanding the chemical toolbox for engineering AAV - New bioorthogonal labeling, including IEDDA, for efficient macromolecule attachment - Incorporation of two different chemistries for dual capsid labeling & much more: onlinelibrary.wiley.com/doi/full/10....

onlinelibrary.wiley.comAn Expanded Toolbox for Versatile Chemical Editing of Adeno‐Associated VirusWe describe technology to introduce diverse non-natural chemical functionalities site-specifically into the capsid of adeno-associated virus through genetic code expansion, and using them to engineer...

Nice work from the Deliz Liang lab @lab-adl.bsky.social on genetically encoding diverse His analogs

Deliz Liang lab@lab-adl.bsky.social

They say the sincerest form of flattery is mimicry, and we really love histidine! ❤️ Check out our most recent work on histidine mimics: Genetic incorporation of diverse non-canonical amino acids for histidine substitution. www.biorxiv.org/content/10.1...

Abhishek Chatterjee reposted

Abhishek Chatterjee reposted

Excited to share our work with Eranthie Weerapana and Tim van Opijnen, co-led by Conor Loynd, Soumya Roy, and Sarah Canarelli! We introduce a new generation of BONCAT tools for the versatile characterization of newly synthesized proteins in pathogenic bacteria. rdcu.be/eI4M5

rdcu.beCell-selective multiplexed bioorthogonal noncanonical amino acid tagging for nascent proteomicsNature Chemical Biology - Engineered aminoacyl-tRNA synthetase (aaRS) mutants have been developed that facilitate ultrafast bioorthogonal noncanonical amino acid tagging (BONCAT) of newly...

Abhishek Chatterjee reposted

Thrilled to see this in print! Co-translational incorporation of a noncanonical monomer into a protein, followed by its triggered post-translational chemical rearrangement, yields novel backbone modifications. One step closer to novel genetically encoded biopolymers!

NSF C-GEM@cgemcci.bsky.social

✨New in Nat Chem Biol: Site-selective protein editing by backbone extension acyl rearrangements bit.ly/4oKQ251 Congrats @roeleah.bsky.social, Izzi, Carly, Taylor, Bhavana, @nxhamlish.bsky.social, Arjun, Diondra, Zhongqi, @achemsynbio.bsky.social, Matt, Scott, Alanna, and collaborators! #NSFfunded

Cool technology from the @chembiobryan.bsky.social lab for high-throughput discovery of protein binders

Nature Methods@natmethods.nature.com

PANCS-Binders (phage-assisted noncontinuous selection of protein binders) screens multiple high-diversity protein libraries against a panel of dozens of targets for high-throughput binder discovery. @chembiobryan.bsky.social @mstyles-chembiol.bsky.social www.nature.com/articles/s41...

Abhishek Chatterjee reposted

Abhishek Chatterjee reposted

Replying to @jeremymberg.bsky.social

I am a big believe of doing your own research and checking facts and sources. BUT THE BIG PROBLEM IS THAT A POST FROM SOME DUDE ON THE INTERNET SHOULD NOT BE WEIGHTED THE SAME AS INFORMATION FROM SOMEONE WHO HAS SPENT DECADES STUDYING AN ISSUE.

Abhishek Chatterjee reposted

Chemists Stuart Schreiber of Harvard University and Arena BioWorks and Peter Schultz of @scripps.edu will split the 2025 Welch Award in Chemistry for their work in the field of chemical biology. cen.acs.org/people/award... #chemsky🧪

cen.acs.org2025 Welch Award honors chemical biologistsRecipients Schreiber and Schultz will each receive $500K prize for work on chemical probes, unnatural amino acids, and new therapeutics

Abhishek Chatterjee reposted

They're terminating OPT. Today the nominee to head USCIS stated directly: he will end Optional Practical Training, the single largest channel for high-skill immigrants to work in the US. 6 weeks ago I warned about this & summarized the research on impacts of this drastic action—> @piie.com

piie.comSkilled immigration on the chopping block? Effects of eliminating "Optional Practical Training" in the USThe White House has taken numerous steps to sharply reduce the number of immigrant workers, with or without legal status, in the US economy. These policies, so far, typically target immigrants with le...

Abhishek Chatterjee reposted

Happy to share a paper from our group on "MapID-tRNA-seq" for confidently identifying modifications by RT mutation signatures in human tRNAs. This method will enable future discoveries of modifications' occurrence and functions in tRNA biology and diseases. www.cell.com/cell-chemica...

cell.comMapID-based quantitative mapping of chemical modifications and expression of human transfer RNAtRNA chemical modifications play critical roles in biology and diseases. Tepe et al. report MapID-tRNA-seq to map m1A, m3C, and multiple bulky modifications in tRNAs from HEK293T and breast cancer-rel...

Abhishek Chatterjee reposted

HAPPY 75th, NSF! We’re celebrating this milestone by highlighting some of NSF’s most transformative accomplishments—innovations that have shaped our world and continue to drive progress in health, technology, the environment, and beyond. Read on 🧵(1/11):

Abhishek Chatterjee reposted

🧪 Though a doubling of NSF's budget might seem far-fetched, that's exactly what Congress said what's needed to maintain national competitiveness in science & tech. From the bipartisan CHIPS and Science Act of 2022:

Dan Garisto@dangaristo.bsky.social

In light of the skinny budget (55.8% reduction), 6 past NSF directors and 7 NSB chairs have sent the House Committee on Appropriations a letter advising doubling the NSF budget. "We face a fork in the road. Do we want to win or concede the race for new knowledge and a competitive STEM workforce?"

Abhishek Chatterjee reposted

BREAKING: Reports that Trump would try to cut NIH's budget by 40% have come true. The request released moments ago would: - Cut $18 BILLION to NIH's $47b budget - Eliminate NIMHD, NCCIH, FIC - Collapse ICs into five 'focus areas' There's also a long screed about NIH's deficiencies.

Abhishek Chatterjee reposted

Quick look at NSF GRFPs awarded 2021-2025. Overall 50% drop from 2024, with biggest absolute decreases in engineering, life sciences and chemistry. (sorry about the meh viz, in a hurry)

Abhishek Chatterjee reposted

Cool work from @klanglab.bsky.social group on identifying and engineering a novel bacterial transporter to import challenging noncanonical amino acids in E. coli, enabling improved incorporation efficiency proteinsproteinshttps://www.biorxiv.org/content/10.1101/2025.03.06.641855v1.abstract

biorxiv.orgHijacking a bacterial membrane transporter for efficient genetic code expansionThe site-specific encoding of non-canonical amino acids (ncAAs) provides a powerful tool for expanding the functional repertoire of proteins. Its widespread use for basic research and biotechnological...

Abhishek Chatterjee reposted

ATTENTION: ADVISORY COUNCIL MEETINGS Nothing posted yet in the Federal Register I had heard that at least some institutes and centers had tentatively scheduled "make-up" meetings in April but are no longer planning these. 1/2

Abhishek Chatterjee reposted

Abhishek Chatterjee reposted

Confirmation!! And including open sessions!

Jeremy Berg@jeremymberg.bsky.social

I now have multiple sources that say at least one round of NATIONAL ADVISORY COUNCIL MEETINGS will now be announced in the Federal Register.

Abhishek Chatterjee reposted

Some encouraging news on the NIH front. The NIA council meeting that was cancelled in January convened virtually in the last day or so and voted on pending grants. This should free up some Alzheimer’s funding.

Abhishek Chatterjee reposted

ACTION ITEM I was chatting with a young scientist who expressed concern re the multiplicity of ongoing issues Over the course of our conversation, we arrived at the idea of a DASHBOARD where issues could be tracked If anyone is interested in helping with this (ideally with expertise) please DM me

Abhishek Chatterjee reposted

NASA has closed its chief science office, its technology/policy/strategy office, and the DEI branch of its equal opportunity office. 23 people have been fired, per a HQ spokesperson.

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Abhishek Chatterjee reposted

NIGMS encouraged PIs to consolidate their grants into a single R35, which requires a PEDP. I appreciated this move for the increased efficiency and fairness. Now it makes those PIs an easy target. Resistance is necessary.

Jeremy Berg@jeremymberg.bsky.social

Apparently, program officers (POs) must evaluate each grant and confirm that it complies with the Exec Orders. The objectionable topics include workforce DEIA, gender identity, environ. justice, foreign sites, and Plans for Enhancing Diverse Perspectives) commonfund.nih.gov/humanvirome/... 3/n