1K8K

Crystal Structure of Arp2/3 Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 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
  • Primary Citation of Related Structures:  
    1K8K

  • 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: 
    • 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
    • Structure and function of the Arp2/3 complex
      Mullins, R.D., Pollard, T.D.
      (1999) Curr Opin Struct Biol 9: 244
    • 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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ACTIN-LIKE PROTEIN 3A418Bos taurusMutation(s): 0 
Gene Names: ACTR3ARP3
Find proteins for P61157 (Bos taurus)
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ACTIN-LIKE PROTEIN 2B394Bos taurusMutation(s): 0 
Gene Names: ACTR2ARP2
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
ARP2/3 COMPLEX 41 KDA SUBUNITC372Bos taurusMutation(s): 0 
Gene Names: ARPC1B
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
ARP2/3 COMPLEX 34 KDA SUBUNITD300Bos taurusMutation(s): 0 
Gene Names: ARPC2
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
ARP2/3 COMPLEX 21 KDA SUBUNITE178Bos taurusMutation(s): 0 
Gene Names: ARPC3
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
ARP2/3 COMPLEX 20 KDA SUBUNITF168Bos taurusMutation(s): 0 
Gene Names: ARPC4
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
ARP2/3 COMPLEX 16 KDA SUBUNITG151Bos taurusMutation(s): 0 
Gene Names: ARPC5
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.71α = 90
b = 130.4β = 90
c = 204.93γ = 90
Software Package:
Software NamePurpose
MLPHAREphasing
REFMACrefinement
MOSFLMdata reduction
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

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