6AO4 image
Deposition Date 2017-08-15
Release Date 2018-04-11
Last Version Date 2023-10-04
Entry Detail
PDB ID:
6AO4
Keywords:
Title:
Crystal structure of the human gasdermin D C-terminal domain
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.90 Å
R-Value Free:
0.28
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
P 21 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Gasdermin-D
Gene (Uniprot):GSDMD
Chain IDs:A
Chain Length:209
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Structures of the Gasdermin D C-Terminal Domains Reveal Mechanisms of Autoinhibition.
Structure 26 778 784.e3 (2018)
PMID: 29576317 DOI: 10.1016/j.str.2018.03.002

Abstact

Pyroptosis is an inflammatory form of programmed cell death that plays important roles in immune protection against infections and in inflammatory disorders. Gasdermin D (GSDMD) is an executor of pyroptosis upon cleavage by caspases-1/4/5/11 following canonical and noncanonical inflammasome activation. GSDMD N-terminal domain assembles membrane pores to induce cytolysis, whereas its C-terminal domain inhibits cell death through intramolecular association with the N domain. The molecular mechanisms of autoinhibition for GSDMD are poorly characterized. Here we report the crystal structures of the human and murine GSDMD C-terminal domains, which differ from those of the full-length murine GSDMA3 and the human GSDMB C-terminal domain. Mutations of GSDMD C-domain residues predicted to locate at its interface with the N-domain enhanced pyroptosis. Our results suggest that GSDMDs may employ a distinct mode of intramolecular domain interaction and autoinhibition, which may be relevant to its unique role in pyroptosis downstream of inflammasome activation.

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