ISDA: 8VIZ

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

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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

Primary Citation

Mechanism of actin filament severing and capping by gelsolin.

Barrie, K.R, Rebowski, G, Dominguez, R, Barrie, K.R, Rebowski, G, Dominguez, R.Show

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.

Legend

Protein

Chemical

Disease

Primary Citation of related structures

Abstact

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