Biological Assembly 1  

 3D View: Structure

Global Symmetry: Helical - H  (3D View)
Global Stoichiometry: Homo 11-mer - A11 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 463.07 kDa 
• Atom Count: 31834 
• Modelled Residue Count: 4081 
• Deposited Residue Count: 4147 
• Unique protein chains: 1

3J8J

Tilted state of actin, T1

• DOI: 10.2210/pdb3J8J/pdb
• EMDataResource: EMD-6180

• Classification: STRUCTURAL PROTEIN
• Organism(s): Oryctolagus cuniculus
• Mutation(s): No 


• Deposited: 2014-11-07 Released: 2015-01-14 
• Deposition Author(s): Galkin, V.E., Orlova, A., Vos, M.R., Schroder, G.F., Egelman, E.H.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 12.0 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

Near-atomic resolution for one state of f-actin.

Galkin, V.E., Orlova, A., Vos, M.R., Schroder, G.F., Egelman, E.H.

(2015) Structure 23: 173-182

• PubMed: 25533486 
• DOI: 10.1016/j.str.2014.11.006
• Primary Citation of Related Structures:  
  3J8I, 3J8J, 3J8K


• PubMed Abstract: 
  

Actin functions as a helical polymer, F-actin, but attempts to build an atomic model for this filament have been hampered by the fact that the filament cannot be crystallized and by structural heterogeneity. We have used a direct electron detector, cryo-electron microscopy, and the forces imposed on actin filaments in thin films to reconstruct one state of the filament at 4.7 Å resolution, which allows for building a reliable pseudo-atomic model of F-actin. We also report a different state of the filament where actin protomers adopt a conformation observed in the crystal structure of the G-actin-profilin complex with an open ATP-binding cleft. Comparison of the two structural states provides insights into ATP-hydrolysis and filament dynamics. The atomic model provides a framework for understanding why every buried residue in actin has been under intense selective pressure.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908-0733, USA. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Actin, alpha skeletal muscle	A, B, C, D, E, F, G, H, I, J, K	377	Oryctolagus cuniculus	Mutation(s): 0  Gene Names: ACTA1, ACTA
UniProt
Find proteins for P68135 (Oryctolagus cuniculus) Explore P68135  Go to UniProtKB:  P68135

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 12.0 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2014-11-07 
• Released Date: 2015-01-14 
Deposition Author(s): Galkin, V.E., Orlova, A., Vos, M.R., Schroder, G.F., Egelman, E.H.

Revision History  

• Version 1.0: 2015-01-14
  Type: Initial release
  
• Version 1.1: 2015-01-21
  Changes: Database references
• Version 1.2: 2018-07-18
  Changes: Author supporting evidence, Data collection