Journal Article

PUBDB-2025-03854

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Room-temperature X-ray fragment screening with serial crystallography

Guenther, S. (Corresponding author)CFEL*XFEL.EU*DESY* ; Fischer, P.CFEL*XFEL.EU*DESY* ; Galchenkova, M.CFEL*XFEL.EU*DESY* ; Falke, S.CFEL*Extern*EMBL*DESY* ; Reinke, P.CFEL*DESY* ; Thekku Veedu, S.CFEL*XFEL.EU*DESY* ; Rodrigues, A. C.CFEL*Extern*DESY* ; Senst, J. M.CFEL*DESY* ; Elinjikkal, D.CFEL*DESY* ; Gumprecht, L.CFEL*XFEL.EU*DESY* ; Meyer, J.CFEL*XFEL.EU*DESY* ; Chapman, H. N.CFEL*XFEL.EU*DESY* ; Barthelmess, M.CFEL*XFEL.EU*DESY* ; Meents, A. (Corresponding author)CFEL*XFEL.EU*DESY*

2025
Springer Nature [London]

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Please use a persistent id in citations: doi:10.1038/s41467-025-64918-6  doi:10.3204/PUBDB-2025-03854

Abstract: Structural insights into protein-ligand interactions are essential for advancing drug development, with macromolecular X-ray crystallography being a cornerstone technique. Commonly X-ray data collection is conducted at cryogenic temperatures to mitigate radiation damage effects. However, this can introduce artifacts not only in the protein conformation but also in protein-ligand interactions. Recent studies highlight the advantages of room-temperature (RT) crystallography in capturing relevant states much closer to physiological temperatures. We have advanced fixed-target serial crystallography to enable high-throughput fragment screening at RT. Here we systematically compare RT fragment screening with conventional single crystal data collection at cryogenic temperature (cryo) of the Fosfomycin-resistance protein A from Klebsiella pneumoniae (FosAKP), an enzyme involved in antibiotic resistance. With RT serial crystallography we achieve resolutions comparable to cryogenic methods and identify a previously unobserved conformational state of the active site, offering additional starting points for drug design. For ligands identified in both screens, temperature did not have an influence on the binding mode of the ligand. But overall, we observed more binders at cryo, both at physiologically relevant and non-relevant sites. With the potential for further automation, RT screening with serial crystallography can advance drug development pipelines by making new conformations of proteins accessible.

Note: The following grants are not listed in the system and, therefore, I could not select them:- Federal Ministry of Education and Research (BMBF) via the Röntgen-Ångström-Cluster project “X-ray drug design platform” (13K22CHB) and project “conSCIENCE” (16GW0277)- Helmholtz Society: FISVIR and SFragX - Helmholtz Association Impulse and Networking funds InternLabs-0011-HIR3X- Deutsche Forschungsgemeinschaft (DFG): Cluster of Excellence “CUI: Advanced Imaging of Matter” of the—EXC 2056—project ID 390715994

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Contributing Institute(s):

1. FS-CFEL-1 Fachgruppe BMX (FS-CFEL-1-BMX)

Research Program(s):

1. 633 - Life Sciences – Building Blocks of Life: Structure and Function (POF4-633) (POF4-633)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: BAG-20230011 (BAG-20230011) (BAG-20230011)
4. FISCOV - FISCOV Helmholtz large research infrastructures in the fight against epidemic outbreaks (FISCOV) (FISCOV)
5. AIM, DFG project G:(GEPRIS)390715994 - EXC 2056: CUI: Advanced Imaging of Matter (390715994) (390715994)

Experiment(s):

1. PETRA Beamline P09-HiPhaX (PETRA III)
2. PETRA Beamline P11 (PETRA III)

Appears in the scientific report 2025

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