4JD2 image
Deposition Date 2013-02-22
Release Date 2013-07-17
Last Version Date 2024-02-28
Entry Detail
PDB ID:
4JD2
Keywords:
STRUCTURAL PROTEIN
Title:
Crystal structure of Bos taurus Arp2/3 complex binding with Mus musculus GMF
Biological Source:
Source Organism:
Bos taurus (Taxon ID: 9913)
Mus musculus (Taxon ID: 10090)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
3.08 Å
R-Value Free:
0.24
R-Value Work:
0.20
R-Value Observed:
0.21
Space Group:
P 65
4JD2 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Actin-related protein 3
Gene (Uniprot):ACTR3
Chain IDs:A
Chain Length:418
Number of Molecules:1
Biological Source:Bos taurus
UniProt ID:P61157 Pfam ID:PF00022
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Actin-related protein 2
Gene (Uniprot):ACTR2
Chain IDs:B
Chain Length:394
Number of Molecules:1
Biological Source:Bos taurus
UniProt ID:A7MB62 Pfam ID:PF00022
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Actin-related protein 2/3 complex subunit 1B
Gene (Uniprot):ARPC1B
Chain IDs:C
Chain Length:372
Number of Molecules:1
Biological Source:Bos taurus
UniProt ID:Q58CQ2 Pfam ID:PF00400
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Actin-related protein 2/3 complex subunit 2
Gene (Uniprot):ARPC2
Chain IDs:D
Chain Length:300
Number of Molecules:1
Biological Source:Bos taurus
UniProt ID:Q3MHR7 Pfam ID:PF04045
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Actin-related protein 2/3 complex subunit 3
Gene (Uniprot):ARPC3
Chain IDs:E
Chain Length:178
Number of Molecules:1
Biological Source:Bos taurus
UniProt ID:Q3T035 Pfam ID:PF04062
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Actin-related protein 2/3 complex subunit 4
Gene (Uniprot):ARPC4
Chain IDs:F
Chain Length:168
Number of Molecules:1
Biological Source:Bos taurus
UniProt ID:Q148J6 Pfam ID:PF05856
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Actin-related protein 2/3 complex subunit 5
Gene (Uniprot):ARPC5
Chain IDs:G
Chain Length:151
Number of Molecules:1
Biological Source:Bos taurus
UniProt ID:Q3SYX9 Pfam ID:PF04699
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Glia maturation factor gamma
Gene (Uniprot):Gmfg
Chain IDs:H
Chain Length:142
Number of Molecules:1
Biological Source:Mus musculus
UniProt ID:Q9ERL7 Pfam ID:PF00241
Ligand Molecules
ATP
CA
PG4
Primary Citation
Structural basis for regulation of Arp2/3 complex by GMF.
Nat.Struct.Mol.Biol. 20 1062 1068 (2013)
PMID: 23893131 DOI: 10.1038/nsmb.2628

Abstact

The Arp2/3 complex mediates formation of complex cellular structures such as lamellipodia by nucleating branched actin filaments. Arp2/3-complex activity is precisely controlled by over a dozen regulators, yet the structural mechanism by which regulators interact with the complex is unknown. GMF is a recently discovered regulator of the Arp2/3 complex that can inhibit nucleation and disassemble branches. We solved the structure of the 240-kDa assembly of Mus musculus GMF and Bos taurus Arp2/3 complex and found that GMF binds the barbed end of Arp2, overlapping with the proposed binding site of WASP-family proteins. The structure suggests that GMF can bind branch junctions in the manner that cofilin binds filament sides, consistent with a modified cofilin-like mechanism for debranching by GMF. The GMF-Arp2 interface reveals how the ADF-H actin-binding domain in GMF is exploited to specifically recognize Arp2/3 complex and not actin.

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Disease

Primary Citation of related structures
4JD2