Biological Assembly 1  

 3D View: Structure

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 73.15 kDa 
• Atom Count: 5824 
• Residue Count: 639 
• Unique protein chains: 1

1CUN

CRYSTAL STRUCTURE OF REPEATS 16 AND 17 OF CHICKEN BRAIN ALPHA SPECTRIN

• DOI: 10.2210/pdb1CUN/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Gallus gallus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 1999-08-20 Released: 1999-10-06 
• Deposition Author(s): Grum, V.L., Li, D., MacDonald, R.I., Mondragon, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.257 
• R-Value Work: 0.220 

Literature

Structures of two repeats of spectrin suggest models of flexibility.

Grum, V.L., Li, D., MacDonald, R.I., Mondragon, A.

(1999) Cell 98: 523-535

• PubMed: 10481916 
• DOI: 10.1016/s0092-8674(00)81980-7
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Spectrin is a vital component of the cytoskeleton, conferring flexibility on cells and providing a scaffold for a variety of proteins. It is composed of tandem, antiparallel coiled-coil repeats. We report four related crystal structures at 1.45 A, 2.0 A, 3.1 A, and 4.0 A resolution of two connected repeats of chicken brain alpha-spectrin. In all of the structures, the linker region between adjacent units is alpha-helical without breaks, kinks, or obvious boundaries. Two features observed in the structures are (1) conformational rearrangement in one repeat, resulting in movement of the position of a loop, and (2) varying degrees of bending at the linker region. These features form the basis of two different models of flexibility: a conformational rearrangement and a bending model. These models provide novel atomic details of spectrin flexibility.

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Organizational Affiliation: 

Department of Biochemistry, Molecular Biology and Cell Biology, Northwestern University, Evanston, Illinois 60208, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PROTEIN (ALPHA SPECTRIN)	A, B, C	213	Gallus gallus	Mutation(s): 3  Gene Names: CHICKEN BRAIN MRNA FOR SPECTRIN ALPHA-CHAIN, SPTAN1, SPTA2
Find proteins for P07751 (Gallus gallus) Go to UniProtKB:  P07751

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.257 
• R-Value Work: 0.220 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 126.341	α = 90
b = 201.145	β = 90
c = 94.765	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	refinement
REFMAC	refinement
MLPHARE	phasing
DENZO	data reduction
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-08-20 
• Released Date: 1999-10-06 
Deposition Author(s): Grum, V.L., Li, D., MacDonald, R.I., Mondragon, A.

Revision History 

• Version 1.0: 1999-10-06
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2019-07-24
  Changes: Data collection, Refinement description
• Version 1.4: 2019-08-14
  Changes: Data collection