Cited by 13RNA and protein synthesis mechanismsDNA and Nucleic Acid ChemistryProtein Structure and Dynamics

Phosphorylation-mediated conformational change regulates human SLFN11

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Kugler, Michael, Metzner, Felix J., Witte, Gregor, Hopfner, Karl-Peter, Lammens, Katja·2024·Nature Communications

Published version of a preprint

Abstract

Human Schlafen 11 (SLFN11) is sensitizing cells to DNA damaging agents by irreversibly blocking stalled replication forks, making it a potential predictive biomarker in chemotherapy. Furthermore, SLFN11 acts as a pattern recognition receptor for single-stranded DNA (ssDNA) and functions as an antiviral restriction factor, targeting translation in a codon-usage-dependent manner through its endoribonuclease activity. However, the regulation of the various SLFN11 functions and enzymatic activities remains enigmatic. Here, we present cryo-electron microscopy (cryo-EM) structures of SLFN11 bound to tRNA-Leu and tRNA-Met that give insights into tRNA binding and cleavage, as well as its regulation by phosphorylation at S219 and T230. SLFN11 phosphomimetic mutant S753D adopts a monomeric conformation, shows ATP binding, but loses its ability to bind ssDNA and shows reduced ribonuclease activity. Thus, the phosphorylation site S753 serves as a conformational switch, regulating SLFN11 dimerization, as well as ATP and ssDNA binding, while S219 and T230 regulate tRNA recognition and nuclease activity.

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Authors
Kugler, M., Metzner, F. J., Witte, G., Hopfner, K.-P., & Lammens, K.
Affiliations
Ludwig-Maximilians-Universität München (DE)
Corresponding author
Lammens, Katja
Venue
Nature Communications
Published
2024-12-03
Volume
15
Issue
1
Pages
10500-10500
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4404974513
Cited by
13
References
52
Citations by year
2026: 4 · 2025: 9
FWCI
1.77
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • Research Square (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Deutsche Forschungsgemeinschaft (210592381, Gottfried Wilhelm Leibniz-Prize)
  • European Research Council
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
SLFN11, Schlafen 11, phosphorylation, conformational change, tRNA binding, endoribonuclease activity, antiviral restriction factors, DNA damage response, replication fork stalling, tRNALeu, tRNA-Met, protein dimerization, ATP binding, cryo-EM structure
MeSH terms
Adenosine Triphosphate, DNA, Single-Stranded, Endoribonucleases, Humans, Models, Molecular, Nuclear Proteins, Phosphorylation, Protein Binding, Protein Conformation, RNA, Transfer, Cryoelectron Microscopy, Protein Multimerization

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