8VIZ image
Deposition Date 2024-01-05
Release Date 2024-10-16
Last Version Date 2025-06-04
Entry Detail
PDB ID:
8VIZ
Keywords:
PROTEIN BINDING
Title:
Structure of full-length gelsolin bound to the barbed end of F-actin
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Oryctolagus cuniculus (Taxon ID: 9986)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
2.63 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
8VIZ validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Actin, alpha skeletal muscle
Gene (Uniprot):ACTA1
Chain IDs:A, B, C, D, E, F
Chain Length:375
Number of Molecules:6
Biological Source:Oryctolagus cuniculus
UniProt ID:P68135 Pfam ID:PF00022
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Gelsolin
Gene (Uniprot):GSN
Chain IDs:G
Chain Length:746
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P06396 Pfam ID:PF00626
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
HIC A HIS modified residue
Ligand Molecules
ADP
ATP
CA
Primary Citation
Mechanism of actin filament severing and capping by gelsolin.
Nat.Struct.Mol.Biol. 32 237 242 (2025)
PMID: 39448849 DOI: 10.1038/s41594-024-01412-5

Abstact

Gelsolin is the prototypical member of a family of Ca2+-activated F-actin severing and capping proteins. Here we report structures of Ca2+-bound human gelsolin at the barbed end of F-actin. One structure reveals gelsolin's six domains (G1G6) and interdomain linkers wrapping around F-actin, while another shows domains G1G3-a fragment observed during apoptosis-binding on both sides of F-actin. Conformational changes that trigger severing occur on one side of F-actin with G1G6 and on both sides with G1G3. Gelsolin remains bound after severing, blocking subunit exchange.

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Primary Citation of related structures
8VKH