ISDA: 8JYW

Deposition Date 2023-07-04

Release Date 2024-05-01

Last Version Date 2024-05-29

Entry Detail

PDB ID:

8JYW

Keywords:

IMMUNE SYSTEM

Title:

Cryo-EM structure of the gasdermin pore from Trichoplax adhaerens

Biological Source:

Source Organism:

Trichoplax adhaerens (Taxon ID: 10228)

Host Organism:

Escherichia coli BL21(DE3)

Method Details:

Experimental Method:

ELECTRON MICROSCOPY

Resolution:

3.30 Å

Aggregation State:

PARTICLE

Reconstruction Method:

SINGLE PARTICLE

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Gasdermin pore forming domain-containing protein
Gene (Uniprot):TRIADDRAFT_52857
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U (auth: V), V (auth: W), W (auth: X), X (auth: Y), Y (auth: Z), Z (auth: AA), AA (auth: BA), BA (auth: CA), CA (auth: DA), DA (auth: EA), EA (auth: FA), FA (auth: GA), GA (auth: HA), HA (auth: IA), IA (auth: JA), JA (auth: KA), KA (auth: LA), LA (auth: MA), MA (auth: NA), NA (auth: OA), OA (auth: PA), PA (auth: QA), QA (auth: RA), RA (auth: SA), SA (auth: TA), TA (auth: UA), UA (auth: VA), VA (auth: WA), WA (auth: XA), XA (auth: YA), YA (auth: ZA), ZA (auth: AB), AB (auth: BB), BB (auth: CB), CB (auth: DB), DB (auth: EB), EB (auth: FB), FB (auth: GB), GB (auth: HB), HB (auth: IB), IB (auth: JB), JB (auth: KB), KB (auth: LB), LB (auth: MB), MB (auth: NB), NB (auth: OB), OB (auth: PB), PB (auth: QB), QB (auth: RB), RB (auth: SB), SB (auth: TB), TB (auth: UB), UB (auth: VB), VB (auth: WB), WB (auth: XB), XB (auth: YB), YB (auth: ZB), ZB (auth: AC), AC (auth: BC), BC (auth: CC), CC (auth: DC), DC (auth: EC), EC (auth: FC), FC (auth: GC), GC (auth: HC), HC (auth: IC), IC (auth: JC), JC (auth: KC)
Chain Length:254
Number of Molecules:88
Biological Source:Trichoplax adhaerens

UniProt ID:B3RMM6 Pfam ID:PF04598

Ligand Molecules

Primary Citation

Cleavage-independent activation of ancient eukaryotic gasdermins and structural mechanisms.

Li, Y, Hou, Y, Sun, Q, Zeng, H, Meng, F, Tian, X, He, Q, Shao, F, Ding, J.Show

Science 384 adm9190 adm9190 (2024)

PMID: 38662913 DOI: 10.1126/science.adm9190

Abstact

Gasdermins (GSDMs) are pore-forming proteins that execute pyroptosis for immune defense. GSDMs are two-domain proteins activated by proteolytic removal of the inhibitory domain. In this work, we report two types of cleavage-independent GSDM activation. First, TrichoGSDM, a pore-forming domain-only protein from the basal metazoan Trichoplax adhaerens, is a disulfides-linked autoinhibited dimer activated by reduction of the disulfides. The cryo-electron microscopy (cryo-EM) structure illustrates the assembly mechanism for the 44-mer TrichoGSDM pore. Second, RCD-1-1 and RCD-1-2, encoded by the polymorphic regulator of cell death-1 (rcd-1) gene in filamentous fungus Neurospora crassa, are also pore-forming domain-only GSDMs. RCD-1-1 and RCD-1-2, when encountering each other, form pores and cause pyroptosis, underlying allorecognition in Neurospora. The cryo-EM structure reveals a pore of 11 RCD-1-1/RCD-1-2 heterodimers and a heterodimerization-triggered pore assembly mechanism. This study shows mechanistic diversities in GSDM activation and indicates versatile functions of GSDMs.

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