Your browser doesn't support javascript.
loading
Gasdermin D cysteine residues synergistically control its palmitoylation-mediated membrane targeting and assembly.
Margheritis, Eleonora; Kappelhoff, Shirin; Danial, John; Gehle, Nadine; Kohl, Wladislaw; Kurre, Rainer; González Montoro, Ayelén; Cosentino, Katia.
Affiliation
  • Margheritis E; Department of Biology/Chemistry and Center for Cellular Nanoanalytics (CellNanOs), University of Osnabrück, Osnabrück, Germany.
  • Kappelhoff S; Department of Biology/Chemistry and Center for Cellular Nanoanalytics (CellNanOs), University of Osnabrück, Osnabrück, Germany.
  • Danial J; Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK.
  • Gehle N; UK Dementia Research Institute, University of Cambridge, Cambridge, UK.
  • Kohl W; School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, UK.
  • Kurre R; Department of Biology/Chemistry and Center for Cellular Nanoanalytics (CellNanOs), University of Osnabrück, Osnabrück, Germany.
  • González Montoro A; Department of Biology/Chemistry and Center for Cellular Nanoanalytics (CellNanOs), University of Osnabrück, Osnabrück, Germany.
  • Cosentino K; Department of Biology/Chemistry and Center for Cellular Nanoanalytics (CellNanOs), University of Osnabrück, Osnabrück, Germany.
EMBO J ; 43(19): 4274-4297, 2024 Oct.
Article in En | MEDLINE | ID: mdl-39143238
ABSTRACT
Gasdermin D (GSDMD) executes the cell death program of pyroptosis by assembling into oligomers that permeabilize the plasma membrane. Here, by single-molecule imaging, we elucidate the yet unclear mechanism of Gasdermin D pore assembly and the role of cysteine residues in GSDMD oligomerization. We show that GSDMD preassembles at the membrane into dimeric and trimeric building blocks that can either be inserted into the membrane, or further assemble into higher-order oligomers prior to insertion into the membrane. The GSDMD residues Cys39, Cys57, and Cys192 are the only relevant cysteines involved in GSDMD oligomerization. S-palmitoylation of Cys192, combined with the presence of negatively-charged lipids, controls GSDMD membrane targeting. Simultaneous Cys39/57/192-to-alanine (Ala) mutations, but not Ala mutations of Cys192 or the Cys39/57 pair individually, completely abolish GSDMD insertion into artificial membranes as well as into the plasma membrane. Finally, either Cys192 or the Cys39/Cys57 pair are sufficient to enable formation of GSDMD dimers/trimers, but they are all required for functional higher-order oligomer formation. Overall, our study unveils a cooperative role of Cys192 palmitoylation-mediated membrane binding and Cys39/57/192-mediated oligomerization in GSDMD pore assembly. This study supports a model in which Gasdermin D oligomerization relies on a two-step mechanism mediated by specific cysteine residues.
Subject(s)
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Cell Membrane / Cysteine / Phosphate-Binding Proteins / Lipoylation Limits: Animals / Humans Language: En Journal: EMBO J Year: 2024 Type: Article Affiliation country: Germany

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Cell Membrane / Cysteine / Phosphate-Binding Proteins / Lipoylation Limits: Animals / Humans Language: En Journal: EMBO J Year: 2024 Type: Article Affiliation country: Germany