1S35

Crystal Structure of Repeats 8 and 9 of Human Erythroid Spectrin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.222 

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This is version 1.2 of the entry. See complete history

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

  • DOI: 10.1016/j.str.2004.02.022

  • 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. T ...

    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.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Spectrin beta chain, erythrocyte
A
214Homo sapiensMutation(s): 1 
Gene Names: SPTB (SPTB1)
Find proteins for P11277 (Homo sapiens)
Go to Gene View: SPTB
Go to UniProtKB:  P11277
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.222 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 122.151α = 90.00
b = 122.151β = 90.00
c = 49.548γ = 90.00
Software Package:
Software NamePurpose
SHARPphasing
CCP4data scaling
XDSdata reduction
SCALAdata scaling
XDSdata scaling
CNSrefinement
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-04-20
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance