Regensburg 2025 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 32: Computational Biophysics II

BP 32.5: Vortrag

Freitag, 21. März 2025, 10:30–10:45, H46

Towards modeling cellular environments from cryo-electron tomography by high-confidence 3D template matching — •Sergio Cruz-León, Jan Philipp Kreysing, Maziar Heidari, Beata Turoňová, Martin Beck, and Gerhard Hummer — Max Planck Institute of Biophysics, Max-von-Laue-Str. 3, 60438, Frankfurt am Main, Germany

The simulation of biologically realistic systems requires precise knowledge of the composition and spatial arrangement of biomolecules in situ. This information can be obtained from cryo-electron tomography (cryoET), which images the interior of intact cells in 3D. However, feature identification is limited by the low signal-to-noise ratio and anisotropic resolution of the tomographic data. In this talk, I will present our recent advances in high-confidence 3D template matching (hcTM) for cryoET [1] and how we use hcTM to generate simulation-ready molecular models directly from cells [1,2]. hcTM enables the automated and comprehensive detection of a wide variety of macromolecular complexes within crowded eukaryotic cells. The high-confidence molecular assignments have driven both technical advances [3] and biological discoveries [1,2], fostering robust connections between molecular functionality, spatial localization, and cellular context. Thus, hcTM paves the way for modeling and simulating the dynamics of biomolecules in their native environment.

[1] Cruz-León, et al., Nat. Comm., 2024 [2] Kreysing*, Heidari*, Zila*, et al., BioRxiv, 2024 [3] Tuijtel, et al., Sci. Adv., 2024

Keywords: Biomolecular simulations; cryo-electron tomography; cellular environments; High confidence template matching; Modelling