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Sjors Scheres

@sjorsscheres.bsky.social

910 Following3.6k Followers

Joint Head of Structural Studies at @mrclmb.bsky.social. We develop & use #cryoEM to study amyloids in neurodegeneration. #tau, #alphasynuclein, #opensoftware, #RELION. All opinions my own.

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@sjorsscheres.bsky.socialOct 11, 2026, 12:43 PM

The method is based on cool ideas. In effect, it blurs the distinction between structure prediction and structure determination. That probably also means one should carefully rethink validation, i.e. how would one detect erroneous solutions? Exciting times! 😀

@sjorsscheres.bsky.socialOct 11, 2026, 12:31 PM

In general, when optimising a difficult target we have a choice to use prior information to restrain the set of solutions, or to keep some of it aside for validation. This approach is a very interesting exercise in how far one can go with using the available prior information in AlphaFold.

@sjorsscheres.bsky.socialOct 10, 2026, 12:53 PM

One problem with this approach is that our main tool to detect issues, the quality of the map, is gone. That is especially important for weak SNR data sets, where Einstein will be happy to emerge from noise.

@sjorsscheres.bsky.socialOct 6, 2026, 10:10 AM

The study with the organoids was spearheaded by Mehtap Bacioglu in Maria Grazie Spillantini's group. The work on primary cultures was led by Melissa Huang, who was previously in Will McEwan's group and who is now with us, in Michel Goedert's group.

@sjorsscheres.bsky.socialOct 6, 2026, 10:07 AM

Although #cryoEM structures of the seeded aggregates remain to be confirmed, STED microscopy reveals that different seeds lead to distinct morphologies of the seeded aggregates inside the cultures, which will be interesting for our future studies on the distinct downstream effects of tau strains.

@sjorsscheres.bsky.socialOct 6, 2026, 10:05 AM

These results confirm that also in murine primary cultures one can faithfully replicate the structure of the #AD seeds! The AAV system provides lots of flexibility in these seeding experiments. E.g. one can choose to overexpress either 3R or 4R human tau and seed with 3R or 4R tauopathies.

@sjorsscheres.bsky.socialOct 6, 2026, 10:03 AM

When using limited amounts of seeds, we could see density for the methionine at position 337, confirming that we had indeed solved the structure of the seeded aggregates. However, we could also solve the structure of the seeds when using more seeds. This is an important warning for future studies.

@sjorsscheres.bsky.socialOct 6, 2026, 10:01 AM

Because we worried about solving the structure of the seeds, we performed a control experiment where we overexpressed V337M mutant tau and solved the structure. We had previously shown that this mutant still forms PHFs in human brains.

pubmed.ncbi.nlm.nih.gov/40044789/

@sjorsscheres.bsky.socialOct 6, 2026, 9:58 AM

In murine primary cortical cultures, we need overexpression of full-length human tau to get sufficient tau aggregation within the life-span of the cells. But then we also see robust seeded aggregation.

@sjorsscheres.bsky.socialOct 6, 2026, 9:55 AM

The #cryoEM structure of the induced tau filaments reveals that the structure of the seeds in replicated faithfully in this experimental system.

@sjorsscheres.bsky.socialOct 6, 2026, 9:54 AM

Seeding wildtype human organoids with #Alzheimer brain-derived tau filaments, we see increasing tau pathology over a nine-month period. This does not happen when we do not seed, or we seed a tau-knockout organoid.

@sjorsscheres.bsky.socialOct 6, 2026, 8:27 AM

We have 2 new preprints on @biorxivpreprint.bsky.social that describe reconstitution of #Alzheimers paired helical filaments in experimental model systems: one in human brain organoids and one in murine primary cultures.

www.biorxiv.org/content/10.6...
www.biorxiv.org/content/10.6...

@sjorsscheres.bsky.socialOct 4, 2026, 9:42 AM

One practical step could be to limit CVs to a maximum of N papers, where the importance of each paper gets explained. N could vary for different purposes.

@sjorsscheres.bsky.socialOct 4, 2026, 9:36 AM

A cultural change in how we measure/perceive scientific productivity, away from numbers of papers, towards more meaningful measures, would be helpful for many aspects of science and how we organise it.

@labwaggoner.bsky.socialSep 30, 2026, 7:43 PMReposted by @sjorsscheres.bsky.social

Fibrillized tau protein, a feature of neurodegenerative disorders, acts as a prion-like template to induce misfolding in healthy tau @nature.com @sjorsscheres.bsky.social
www.nature.com/articles/d41...
www.nature.com/articles/s41...

@sjorsscheres.bsky.socialOct 1, 2026, 7:39 PM

I agree. Oligomers have been a distraction for too long.

@mrclmb.ac.ukSep 30, 2026, 3:25 PMReposted by @sjorsscheres.bsky.social

How does neurodegeneration spread across the brain? 🧠

@sjorsscheres.bsky.social, Michel Goedert & Masata Hasegawa’s groups have demonstrated that human misfolded tau filaments act as a molecular template for prion-like propagation in the mouse brain.

mrclmb.ac.uk/news-events/...

#LMBResearch 🧪

Alzheimer's and corticobasal degeneration tau filaments induce distinct pathologies in mouse brains, with corresponding cryo-EM images and structural models.
@sjorsscheres.bsky.socialSep 30, 2026, 10:17 AM

Our adventures into #proteinfolding: GuideFlip designs flexible molecular interactions by discrete flow matching to design sequence & structure together! Grateful for funding by Love Tito's (@titosvodka.bsky.social) and the @ukri.org. 🥳

@sjorsscheres.bsky.socialSep 24, 2026, 5:35 AM

Over the last week I have had separate discussions with three people being disillusioned by how bad their colleagues are at their job. Large organizations seem worse. I wonder whether having line managers work together with their people, instead of just leading from above, is a good solution.

@twesq.bsky.socialSep 20, 2026, 8:22 PMReposted by @sjorsscheres.bsky.social

this is fantastic and I learned something new

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