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Posts by Sofi Origanti

Nature Communications banner with title of latest paper from the Yates, Oliver, and Rass groups at the Genome Damage and Stability Centre, University of Sussex: "Break-induced replication is enhanced by a phospho-activated RPA-binding module in Pol32".

Nature Communications banner with title of latest paper from the Yates, Oliver, and Rass groups at the Genome Damage and Stability Centre, University of Sussex: "Break-induced replication is enhanced by a phospho-activated RPA-binding module in Pol32".

An in-press version of our latest paper in @natcomms.nature.com on phospho-activated protein-protein interactions with ssDNA-binding protein RPA during BIR. If your favorite pathway involves RPA, this may be for you! Thanks to the lab, collaborators & @ukri.org!
www.nature.com/articles/s41...

1 week ago 17 8 0 1

This is a really important paper in an area that is hard to study. I would recommend any student read this preprint to see how confounding issues arise even in clever assays. Internal Ribosome Entry Sites (IRES) are very interesting because they bypass normal translation initiation mechanisms. 1/

2 weeks ago 24 14 2 1

Check out the final version of this work, out today! @natcomms.nature.com www.nature.com/articles/s41...

3 weeks ago 38 21 5 0
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Giant DNA viruses encode a hallmark translation initiation complex of eukaryotic life Giant DNA viruses encode a cap-binding complex homologous to eIF4F, the defining translation-initiation complex of eukaryotes. The viral cap-binding complex is required for viral protein synthesis and...

"Here, we discover that giant DNA viruses encode a distinct and functional IF4F translation-initiation complex to drive protein synthesis, thereby blurring the line between cellular and acellular biology"

www.cell.com/cell/fulltex...

2 months ago 12 7 0 0
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new data from NIH about funding trends through FY2025

also a flyby analysis from Claude lol

grants.nih.gov/news-events/...

2 months ago 8 8 1 1
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Ribosomal RNA expansion segments mediate the oligomerization of inactive animal ribosomes Cells down-regulate protein synthesis when stressed to conserve energy and shift resources toward repair. We found that in some mammalian cells, including neurons, stress also resulted in the formatio...

www.science.org/doi/10.1126/...

2 months ago 10 9 0 0
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a man jumping over a fence with the words we 're going on an adventure written below him ALT: a man jumping over a fence with the words we 're going on an adventure written below him

That thrill and excitement when a new idea formulates and can’t wait to test it out without knowing what really lies ahead (spoiler- it’s a dragon - it’s always a dragon!)

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Molecular basis for the activation of Aurora A and Plk1 kinases during mitotic entry - The EMBO Journal The evolutionarily conserved, intrinsically disordered protein Bora is critical for initiating the activation of mitotic kinases. Once phosphorylated at Ser112 by Cyclin A-Cdk1 kinase, phospho-Bora ac...

AlphaFold modeling & new assays for mitotic kinase activation in E. coli (#MITOKINAC) reveal molecular basis of specific Aurora A & PLK1 activation through Bora during mitotic entry
Lionel Pintard @ccdlab.bsky.social et al
#RefereedPreprint ℅ @reviewcommons.org
link.springer.com/article/10.1...

2 months ago 10 7 1 0
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ADAM-tRNA-seq: an optimized approach for demultiplexing and enhanced hierarchal mapping in direct tRNA sequencing Abstract. Transfer RNAs (tRNAs) play an essential role in protein synthesis and cellular homeostasis, and their dysregulation is associated with various hu

Interested in direct tRNA-seq by Nanopore? We developed a new RNA-based barcoding aproach for seq parallelization; it is also cost-saving. Scripts available on github. #tRNA #Nanopore

track.smtpsendmail.com/9032119/c?p=...

2 months ago 24 9 1 1
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PAR-26-121: Maximizing Investigators' Research Award (MIRA) (R35 - Clinical Trial Optional)

I think some folks might be happy to see this. NIGMS MIRA R35 for EI/NI has been published. PAR-26-121 files.simpler.grants.gov/opportunitie...

4 months ago 71 59 8 8

Hi Sara- yes- that’s a good point- we mention in discussion that we currently do not have a clear understanding of how that ties into phosphocode- and needs more work.

4 months ago 1 0 0 0

Thank you Petr!

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We also uncovered that RPA engages in a distinct reciprocal regulation of kinases that phosphorylate RPA such as Cdk1/Wee1 activity and Aurora kinase (and ATR-shown before). There are still many questions and we hope to parse the mechanism further in future studies.

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The synergistic phosphocode driven by the cell cycle-specific phoshphosites structurally reconfigure the domains to enhance accessibility of the N-terminus of RPA32 to DDR kinases.

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With the discovery of a novel phosphosite on RPA70, we show that the canonical roles of RPA extend beyond S phase and regulate the G2 to M phase transitions of cell cycle along with mitosis (shown in our previous study).

4 months ago 1 0 2 0
Mechanism of RPA phosphocode priming and tuning by CDK1/WEE1 signaling circuit - Nature Communications RPA is an essential ssDNA binding protein. Here, authors uncover a phosphosite on RPA70 and show that the RPA70 and RPA32 subunits cooperate through a phosphocode to reconfigure RPA domains. This sugg...

This was another fun collaboration with @professorantony.bsky.social and big thanks to lead authors (Poonam Roshan, Ayush Mistry and Vikas Kaushi) and to all the co-authors.
www.nature.com/articles/s41...

4 months ago 9 2 2 1
PA-26-001: Administrative Supplements to Existing NIH Grants and Cooperative Agreements (Parent Admin Supp Clinical Trial Optional)

Good news- they are continuing to do administrative supplements but the specific dates for NIGMS are unclear!

4 months ago 2 2 0 0
NOT-OD-26-012: Updated Guidance on Reopening of NIH Extramural Activities Following the October 1, 2025 - Lapse in Appropriations NIH Funding Opportunities and Notices in the NIH Guide for Grants and Contracts: Updated Guidance on Reopening of NIH Extramural Activities Following the October 1, 2025 - Lapse in Appropriations NOT-...

Updated guidance on NIH grant application due dates (10/1/2025-12/5/2025), along with some other Info. grants.nih.gov/grants/guide...

4 months ago 19 18 2 4
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ANTONY LAB SAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE Edwin Antony Lab Website

POSTDOCTORAL POSITION IN STRUCTURAL BIOLOGY
We need a structural biologist to work on several CryoEM datasets. For more information, please visit: www.antonylab.org

Expertise in structure refinement and model-building are required.

Please share.

5 months ago 15 19 0 0
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Resumption of Operations at NSF Information for NSF staff and the research community regarding the agency's resumption of operations after a lapse in appropriations.

Science People: We at NSF are still recovering/catching up/getting our lives together. But the agency posted these FAQs about post-shutdown resumption of operations which might answer a lot of Qs for you: www.nsf.gov/resumption-o...

5 months ago 139 100 1 2
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We have written two reviews providing a practical guide and fundamentals of cell migration:

(1) How to select an optimal cell migration assay,
(2) How to analyze cell migration data.

We also added a perspective on AI methods of analysis.

Coming out soon in Nature Methods.

5 months ago 59 15 1 0

Lovely study- Congratulations!

5 months ago 1 0 0 0

Lovely study- Congratulations!

5 months ago 1 0 1 0
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FIGNL1 inhibits homologous recombination in BRCA2 deficient cells by dissociating RAD51 filaments Homologous recombination (HR) deficiency upon Breast Cancer Gene 2 (BRCA2) loss arises from defects in the formation of RAD51 nucleoprotein filaments. We demonstrate that loss of the anti-recombinase ...

Want to know how homologous recombination defects are caused upon loss of BRCA2? Check out our recent efforts in uncovering this phenomenon just out in Science!
www.science.org/doi/10.1126/...

5 months ago 53 15 9 0
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Among the anti-recombinases, FIGNL1 rules them all. So much that inactivating it brings BRCA2-deficient cells to life. Who is responsible for RAD51 loading without BRCA2/FIGNL1, check out the paper to find out! Great collaboration with @raychaudhurilab.bsky.social

www.science.org/doi/10.1126/...

5 months ago 53 22 6 1

I love AlphaFold—but please include PAE (Predicted Aligned Error) plots for every “interaction.” Pretty PDBs ≠ proof. If the PAE doesn’t show an interface, it ain’t one. Show the plots. Structural biology's reputation is on the line.

5 months ago 129 29 5 4
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See our paper “Mechanism of trinucleotide repeat expansion by MutSβ-MutLγ and contraction by FAN1”. Using biochemistry, we show how DNA incisions by the MutLγ nuclease can lead to expansions, and how expansion is prevented by FAN1. Well done Issam and Valentina!

www.nature.com/articles/s41...

5 months ago 39 12 1 1
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GCN1 couples GCN2 to ribosomal state to initiate amino acid response pathway signaling During nutrient deprivation, activation of the protein kinase GCN2 regulates cell survival and metabolic homeostasis. In addition to amino acid stress, GCN2 is activated by a variety of cellular stres...

Beautiful reconstitution of amino acid stress-dependent ISR activation by my @harvardcellbio.bsky.social colleagues presenting a unifying mechanism for GCN2 activation, which requires ribosome collisions and is enhanced by cognate uncharged tRNA in the A site! www.science.org/doi/10.1126/...

6 months ago 53 19 2 2
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Principles of cotranslational mitochondrial protein import Selective ribosome profiling reveals that nearly 20% of mitochondrial proteins in human cells are imported during translation on cytosolic ribosomes. Cotranslational import requires an N-terminal pres...

Emmanuel Levy @elevylab.bsky.social has joined BlueSky 🌟 with a fantastic Cell paper with Shu-ou Shan, showing the interactome of the TOM complex and how cotranslational mito import prioritizes large globular domains. Beautiful science!
Give him a warm welcome 🎉
link: www.cell.com/cell/fulltex...

7 months ago 39 13 1 1
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ACS announces millions in funding for students affected by terminated grants The grants will help students within 1 year of completion of their degree

The American Chemical Society announced that the ACS Board of Directors has approved $2.5 million to be granted to graduate students who have been impacted by the termination or cancellation of their adviser’s research grant(s) cen.acs.org/acs-news/acs... #chemsky

8 months ago 79 40 3 7