Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 24.46 kDa 
• Atom Count: 1871 
• Modelled Residue Count: 211 
• Deposited Residue Count: 214 
• Unique protein chains: 1

1S35

Crystal Structure of Repeats 8 and 9 of Human Erythroid Spectrin

• PDB DOI: 10.2210/pdb1S35/pdb

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


• Deposited: 2004-01-12 Released: 2004-04-20 
• Deposition Author(s): Kusunoki, H., MacDonald, R.I., Mondragon, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.259 
• R-Value Work: 0.222 

Literature

Structural insights into the stability and flexibility of unusual erythroid spectrin repeats

Kusunoki, H., MacDonald, R.I., Mondragon, A.

(2004) Structure 12: 645-656

• PubMed: 15062087 
• DOI: 10.1016/j.str.2004.02.022
• Primary Citation of Related Structures:  
  1S35


• PubMed Abstract: 
  

Erythroid spectrin, a major component of the cytoskeletal network of the red cell which contributes to both the stability and the elasticity of the red cell membrane, is composed of two subunits, alpha and beta, each formed by 16-20 tandem repeats. The properties of the repeats and their relative arrangement are thought to be key determinants of spectrin flexibility. Here we report a 2.4 A resolution crystal structure of human erythroid beta-spectrin repeats 8 and 9. This two-repeat fragment is unusual as it exhibits low stability of folding and one of its repeats lacks two tryptophans highly conserved among spectrin repeats. Two key factors responsible for the lower stability and, possibly, its flexibility, are revealed by the structure. A third novel feature of the structure is the relative orientation of the two repeats, which increases the range of possible conformations and provides new insights into atomic models of spectrin flexibility.

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Organizational Affiliation: 

Department of Biochemistry, Molecular Biology, and Cell Biology, Northwestern University, 2205 Tech Drive, Evanston, IL 60208 USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Spectrin beta chain, erythrocyte	A	214	Homo sapiens	Mutation(s): 1  Gene Names: SPTB, SPTB1
UniProt & NIH Common Fund Data Resources
Find proteins for P11277 (Homo sapiens) Explore P11277  Go to UniProtKB:  P11277
PHAROS:  P11277

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A], C [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.259 
• R-Value Work: 0.222 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 122.151	α = 90
b = 122.151	β = 90
c = 49.548	γ = 90

Software Package:

Software Name	Purpose
XDS	data scaling
SCALA	data scaling
SHARP	phasing
SOLVE	phasing
CNS	refinement
XDS	data reduction
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-01-12 
• Released Date: 2004-04-20 
Deposition Author(s): Kusunoki, H., MacDonald, R.I., Mondragon, A.

Revision History  

• Version 1.0: 2004-04-20
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2021-10-27
  Changes: Database references, Derived calculations