1K8K

Crystal Structure of Arp2/3 Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of Arp2/3 Complex

Robinson, R.C.Turbedsky, K.Kaiser, D.A.Marchand, J.-B.Higgs, H.N.Choe, S.Pollard, T.D.

(2001) Science 294: 1679-1684

  • DOI: 10.1126/science.1066333

  • PubMed Abstract: 
  • We determined a crystal structure of bovine Arp2/3 complex, an assembly of seven proteins that initiates actin polymerization in eukaryotic cells, at 2.0 angstrom resolution. Actin-related protein 2 (Arp2) and Arp3 are folded like actin, with distinc ...

    We determined a crystal structure of bovine Arp2/3 complex, an assembly of seven proteins that initiates actin polymerization in eukaryotic cells, at 2.0 angstrom resolution. Actin-related protein 2 (Arp2) and Arp3 are folded like actin, with distinctive surface features. Subunits ARPC2 p34 and ARPC4 p20 in the core of the complex associate through long carboxyl-terminal alpha helices and have similarly folded amino-terminal alpha/beta domains. ARPC1 p40 is a seven-blade beta propeller with an insertion that may associate with the side of an actin filament. ARPC3 p21 and ARPC5 p16 are globular alpha-helical subunits. We predict that WASp/Scar proteins activate Arp2/3 complex by bringing Arp2 into proximity with Arp3 for nucleation of a branch on the side of a preexisting actin filament.


    Related Citations: 
    • Structure and function of the Arp2/3 complex
      Mullins, R.D.,Pollard, T.D.
      (1999) Curr.Opin.Struct.Biol. 9: 244
    • Influence of the Wiskott-Aldrich syndrome protein (WASp) C terminus and Arp2/3 complex on actin polymerization
      Higgs, H.N.,Blanchoin, L.,Pollard, T.D.
      (1999) Biochemistry 38: 15212
    • Biophysics of actin filament dynamics in nonmuscle cells
      Pollard, T.D.,Blanchoin, L.,Mullins, R.D.
      (2000) Annu.Rev.Biophys.Biomol.Struct. 29: 545


    Organizational Affiliation

    Structural Biology Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACTIN-LIKE PROTEIN 3
A
418Bos taurusGene Names: ACTR3 (ARP3)
Find proteins for P61157 (Bos taurus)
Go to Gene View: ACTR3
Go to UniProtKB:  P61157
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ACTIN-LIKE PROTEIN 2
B
394Bos taurusGene Names: ACTR2 (ARP2)
Find proteins for A7MB62 (Bos taurus)
Go to Gene View: ACTR2
Go to UniProtKB:  A7MB62
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
ARP2/3 COMPLEX 41 KDA SUBUNIT
C
372Bos taurusGene Names: ARPC1B
Find proteins for Q58CQ2 (Bos taurus)
Go to Gene View: ARPC1B
Go to UniProtKB:  Q58CQ2
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
ARP2/3 COMPLEX 34 KDA SUBUNIT
D
300Bos taurusGene Names: ARPC2
Find proteins for Q3MHR7 (Bos taurus)
Go to Gene View: ARPC2
Go to UniProtKB:  Q3MHR7
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
ARP2/3 COMPLEX 21 KDA SUBUNIT
E
178Bos taurusGene Names: ARPC3
Find proteins for Q3T035 (Bos taurus)
Go to Gene View: ARPC3
Go to UniProtKB:  Q3T035
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
ARP2/3 COMPLEX 20 KDA SUBUNIT
F
168Bos taurusGene Names: ARPC4
Find proteins for Q148J6 (Bos taurus)
Go to Gene View: ARPC4
Go to UniProtKB:  Q148J6
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
ARP2/3 COMPLEX 16 KDA SUBUNIT
G
151Bos taurusGene Names: ARPC5
Find proteins for Q3SYX9 (Bos taurus)
Go to Gene View: ARPC5
Go to UniProtKB:  Q3SYX9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 111.710α = 90.00
b = 130.400β = 90.00
c = 204.930γ = 90.00
Software Package:
Software NamePurpose
MLPHAREphasing
REFMACrefinement
CCP4data scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-12-07
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance