4D1E | pdb_00004d1e

THE CRYSTAL STRUCTURE OF HUMAN MUSCLE ALPHA-ACTININ-2

• PDB DOI: https://doi.org/10.2210/pdb4D1E/pdb

• Classification: CONTRACTILE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2014-05-01 Released: 2014-12-10 
• Deposition Author(s): Pinotsis, N., Salmazo, A., Sjoeblom, B., Gkougkoulia, E., Djinovic-Carugo, K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.50 Å
• R-Value Free: 
  0.258 (Depositor), 0.216 (DCC) 
• R-Value Work: 
  0.205 (Depositor), 0.213 (DCC) 
• R-Value Observed: 
  0.207 (Depositor) 

Starting Models: experimental

Literature

The Structure and Regulation of Human Muscle Alpha-Actinin

Ribeiro Jr, E.A., Pinotsis, N., Ghisleni, A., Salmazo, A., Konarev, P.V., Kostan, J., Sjoeblom, B., Schreiner, C., Polyansky, A.A., Gkougkoulia, E., Holt, M.R., Aachmann, F.L., Zagrovic, B., Bordignon, E., Pirker, K.F., Svergun, D.I., Gautel, M., Djinovic-Carugo, K.

(2014) Cell 159: 1447

• PubMed: 25433700 
• DOI: https://doi.org/10.1016/j.cell.2014.10.056
• Primary Citation Related Structures: 
  4D1E


• PubMed Abstract: 
  

  The spectrin superfamily of proteins plays key roles in assembling the actin cytoskeleton in various cell types, crosslinks actin filaments, and acts as scaffolds for the assembly of large protein complexes involved in structural integrity and mechanosensation, as well as cell signaling. α-actinins in particular are the major actin crosslinkers in muscle Z-disks, focal adhesions, and actin stress fibers. We report a complete high-resolution structure of the 200 kDa α-actinin-2 dimer from striated muscle and explore its functional implications on the biochemical and cellular level. The structure provides insight into the phosphoinositide-based mechanism controlling its interaction with sarcomeric proteins such as titin, lays a foundation for studying the impact of pathogenic mutations at molecular resolution, and is likely to be broadly relevant for the regulation of spectrin-like proteins.

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Organizational Affiliation: 
• Department of Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna, Campus Vienna Biocenter 5, 1030 Vienna, Austria.
British Heart Foundation Centre of Research Excellence, Randall Division for Cell and Molecular Biophysics and Cardiovascular Division, King's College London, London SE1 1UL, UK.
European Molecular Biology Laboratory, Deutsches Elektronen-Synchrotron, Notkestrasse 85, 22603 Hamburg, Germany.
Department of Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna, Campus Vienna Biocenter 5, 1030 Vienna, Austria; M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia.
Department of Biotechnology, Norwegian University of Science and Technology, Sem Sælands vei 6/8, 7491 Trondheim, Norway.
Laboratory of Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland; Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany.
Division of Biochemistry, Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria.
British Heart Foundation Centre of Research Excellence, Randall Division for Cell and Molecular Biophysics and Cardiovascular Division, King's College London, London SE1 1UL, UK. Electronic address: [e-mail].
Department of Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna, Campus Vienna Biocenter 5, 1030 Vienna, Austria; Department of Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, 1000 Ljubljana, Slovenia. Electronic address: [e-mail].

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 101.85 kDa 
• Atom Count: 6,865 
• Modeled Residue Count: 859 
• Deposited Residue Count: 876 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ALPHA-ACTININ-2	A	876	Homo sapiens	Mutation(s): 2
UniProt & NIH Common Fund Data Resources
Find proteins for P35609 (Homo sapiens) Explore P35609  Go to UniProtKB:  P35609
PHAROS:  P35609 GTEx:  ENSG00000077522

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MLZ	A	L-PEPTIDE LINKING	C7 H16 N2 O2		LYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.50 Å
• R-Value Free:  0.258 (Depositor), 0.216 (DCC) 
• R-Value Work:  0.205 (Depositor), 0.213 (DCC) 
• R-Value Observed: 0.207 (Depositor) 

Space Group: P 2 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 73.334	α = 90
b = 102.613	β = 90
c = 182.977	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-12-10 
Deposition Author(s): Pinotsis, N., Salmazo, A., Sjoeblom, B., Gkougkoulia, E., Djinovic-Carugo, K.

Revision History  

• Version 1.0: 2014-12-10
  Type: Initial release
  
• Version 1.1: 2014-12-17
  Changes: Database references
• Version 1.2: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description