2SPC

CRYSTAL STRUCTURE OF THE REPETITIVE SEGMENTS OF SPECTRIN

• PDB DOI: https://doi.org/10.2210/pdb2SPC/pdb

• Classification: CYTOSKELETON
• Organism(s): Drosophila melanogaster
• Mutation(s): No 


• Deposited: 1994-03-01 Released: 1994-05-31 
• Deposition Author(s): Yan, Y., Winograd, E., Viel, A., Cronin, T., Harrison, S.C., Branton, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Work: 0.203 
• R-Value Observed: 0.203 

Literature

Crystal structure of the repetitive segments of spectrin.

Yan, Y., Winograd, E., Viel, A., Cronin, T., Harrison, S.C., Branton, D.

(1993) Science 262: 2027-2030

• PubMed: 8266097 
• DOI: https://doi.org/10.1126/science.8266097
• Primary Citation of Related Structures:  
  2SPC


• PubMed Abstract: 
  

  The elongated proteins of the spectrin family (dystrophin, alpha-actinin, and spectrin) contain tandemly repeated segments and form resilient cellular meshworks by cross-linking actin filaments. The structure of one of the repetitive segments of alpha-spectrin was determined at a 1.8 angstrom resolution. A segment consists of a three-helix bundle. A model of the interface between two tandem segments suggests that hydrophobic interactions between segments may constrain intersegment flexibility. The helix side chain interactions explain how mutations that are known to produce hemolytic anemias disrupt spectrin associations that sustain the integrity of the erythrocyte membrane.

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Organizational Affiliation: 

Department of Biochemistry, Harvard University, Cambridge, MA 02138.

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: 24.59 kDa 
• Atom Count: 1,882 
• Modelled Residue Count: 214 
• Deposited Residue Count: 214 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SPECTRIN	A, B	107	Drosophila melanogaster	Mutation(s): 0
UniProt
Find proteins for P13395 (Drosophila melanogaster) Explore P13395  Go to UniProtKB:  P13395

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Work: 0.203 
• R-Value Observed: 0.203 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.8	α = 90
b = 47.22	β = 90
c = 104.43	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
TNT	refinement
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-05-31 
Deposition Author(s): Yan, Y., Winograd, E., Viel, A., Cronin, T., Harrison, S.C., Branton, D.

Revision History  

• Version 1.0: 1994-05-31
  Type: Initial release
  
• Version 1.1: 2008-03-25
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2011-11-16
  Changes: Atomic model
• Version 1.4: 2019-07-17
  Changes: Data collection, Other, Refinement description
• Version 1.5: 2019-08-14
  Changes: Data collection, Refinement description
• Version 1.6: 2024-02-21
  Changes: Data collection, Database references