PreprintCited by 20Protein Structure and Dynamicsvaccines and immunoinformatics approachesComputational Drug Discovery Methods

Predicting the conformational flexibility of antibody and T-cell receptor CDRs

Open access
Spoendlin, Fabian C., Fernández-Quintero, Monica L., Raghavan, Sai S. R., Turner, Hannah L., Gharpure, Anant, Loeffler, Johannes R., Wong, Wing K., Bujotzek, Alexander +3 more·2025·Nature Machine Intelligence

Preprint — published as 10.1038/s42256-025-01131-6 · Paper page

Abstract

Many proteins are highly flexible and their ability to adapt their shape can be fundamental to their functional properties. We can now computationally predict a single, static protein structure with high accuracy. However, we are not yet able to reliably predict structural flexibility. A major factor limiting such predictions is the scarcity of suitable training data. Here, we focus on predicting the structural flexibility of the functionally important antibody and T-cell receptor CDR3 loops. We extracted a dataset of CDR3 like loop motifs from the PDB to create ALL-conformations, a dataset containing 1.2 million structures and more than 100,000 unique sequences. Using this dataset, we develop ITsFlexible a method classifying CDR3 flexibility, which outperforms all alternative approaches on our crystal structure datasets and successfully generalises to MD simulations. We also used ITsFlexible to predict the flexibility of three completely novel CDRH3 loops and experimentally determined their conformations using cryo-EM.

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Authors
Spoendlin, F. C., Fernández-Quintero, M. L., Raghavan, S. S. R., Turner, H. L., Gharpure, A., Loeffler, J. R., Wong, W. K., Bujotzek, A., Georges, G., Ward, A. B., & Deane, C. M.
Affiliations
  • University of Oxford (GB)
  • Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, USA
  • Scripps Research Institute (US)
  • Roche Pharma AG (Germany) (DE)
Corresponding author
  • Spoendlin, Fabian C.
  • Deane, Charlotte M.
Venue
Nature Machine Intelligence
Publisher
openRxiv
Published
2025-03-19
Volume
7
Issue
10
Pages
1755-1767
ISSN
2522-5839 (ISSN-L)
OpenAlex
W4415380213
Cited by
20
References
82
Citations by year
2026: 13 · 2025: 7
FWCI
6.01
Type
journal article
Language
en
Open access
Locations
  • Nature Machine Intelligence (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Roche
  • Research Councils UK (EP/S024093/1)
  • Royal Commission for the Exhibition of 1851
  • Engineering and Physical Sciences Research Council (EP/S024093, EP/S024093/1)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › vaccines and immunoinformatics approaches
  • Physical Sciences › Computer Science › Computational Theory and Mathematics › Computational Drug Discovery Methods
Keywords
hypervariable region, CDR3 loop, T cell receptor, graph neural networks, protein flexibility, molecular dynamics simulation, cryo-electron microscopy, protein structure prediction

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