1HCI | pdb_00001hci

CRYSTAL STRUCTURE OF THE ROD DOMAIN OF ALPHA-ACTININ

• PDB DOI: https://doi.org/10.2210/pdb1HCI/pdb

• Classification: TRIPLE-HELIX COILED COIL
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2001-05-04 Released: 2001-06-27 
• Deposition Author(s): Ylanne, J., Scheffzek, K., Young, P., Saraste, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 
  0.295 (Depositor), 0.285 (DCC) 
• R-Value Work: 
  0.270 (Depositor), 0.261 (DCC) 
• R-Value Observed: 
  0.270 (Depositor) 

Starting Model: experimental

Literature

Crystal Structure of the Alpha-Actinin Rod Reveals an Extensive Torsional Twist

Ylanne, J., Scheffzek, K., Young, P., Saraste, M.

(2001) Structure 9: 597

• PubMed: 11470434 
• DOI: https://doi.org/10.1016/s0969-2126(01)00619-0
• Primary Citation Related Structures: 
  1HCI


• PubMed Abstract: 
  

  Alpha-actinin is a ubiquitously expressed protein found in numerous actin structures. It consists of an N-terminal actin binding domain, a central rod domain, and a C-terminal domain and functions as a homodimer to cross-link actin filaments. The rod domain determines the distance between cross-linked actin filaments and also serves as an interaction site for several cytoskeletal and signaling proteins. We report here the crystal structure of the alpha-actinin rod. The structure is a twisted antiparallel dimer that contains a conserved acidic surface. The novel features revealed by the structure allow prediction of the orientation of parallel and antiparallel cross-linked actin filaments in relation to alpha-actinin. The conserved acidic surface is a possible interaction site for several cytoplasmic tails of transmembrane proteins involved in the recruitment of alpha-actinin to the plasma membrane.

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Organizational Affiliation: 
• European Molecular Biology Laboratory, EMBL, Structural and Computational Biology Programme, Meyerhofstrasse 1, D-69117, Heidelberg, Germany. [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 PQS (software)

Macromolecule Content 

• Total Structure Weight: 112.42 kDa 
• Atom Count: 7,900 
• Modeled Residue Count: 950 
• Deposited Residue Count: 952 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ALPHA-ACTININ 2	A, B	476	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P35609 (Homo sapiens) Explore P35609  Go to UniProtKB:  P35609
PHAROS:  P35609 GTEx:  ENSG00000077522

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free:  0.295 (Depositor), 0.285 (DCC) 
• R-Value Work:  0.270 (Depositor), 0.261 (DCC) 
• R-Value Observed: 0.270 (Depositor) 

Space Group: P 3₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 103.28	α = 90
b = 103.28	β = 90
c = 218.64	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
XDS	data reduction
XDS	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2001-06-27 
Deposition Author(s): Ylanne, J., Scheffzek, K., Young, P., Saraste, M.

Revision History  

• Version 1.0: 2001-06-27
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-12-13
  Changes: Data collection, Database references, Refinement description