3LBX

Crystal Structure of the Erythrocyte Spectrin Tetramerization Domain Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.268 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure and functional interpretation of the erythrocyte spectrin tetramerization domain complex.

Ipsaro, J.J.Harper, S.L.Messick, T.E.Marmorstein, R.Mondragon, A.Speicher, D.W.

(2010) Blood 115: 4843-4852

  • DOI: 10.1182/blood-2010-01-261396

  • PubMed Abstract: 
  • As the principal component of the membrane skeleton, spectrin confers integrity and flexibility to red cell membranes. Although this network involves many interactions, the most common hemolytic anemia mutations that disrupt erythrocyte morphology af ...

    As the principal component of the membrane skeleton, spectrin confers integrity and flexibility to red cell membranes. Although this network involves many interactions, the most common hemolytic anemia mutations that disrupt erythrocyte morphology affect the spectrin tetramerization domains. Although much is known clinically about the resulting conditions (hereditary elliptocytosis and pyropoikilocytosis), the detailed structural basis for spectrin tetramerization and its disruption by hereditary anemia mutations remains elusive. Thus, to provide further insights into spectrin assembly and tetramer site mutations, a crystal structure of the spectrin tetramerization domain complex has been determined. Architecturally, this complex shows striking resemblance to multirepeat spectrin fragments, with the interacting tetramer site region forming a central, composite repeat. This structure identifies conformational changes in alpha-spectrin that occur upon binding to beta-spectrin, and it reports the first structure of the beta-spectrin tetramerization domain. Analysis of the interaction surfaces indicates an extensive interface dominated by hydrophobic contacts and supplemented by electrostatic complementarity. Analysis of evolutionarily conserved residues suggests additional surfaces that may form important interactions. Finally, mapping of hereditary anemia-related mutations onto the structure demonstrate that most, but not all, local hereditary anemia mutations map to the interacting domains. The potential molecular effects of these mutations are described.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Spectrin alpha chain, erythrocyte
A
161Homo sapiensMutation(s): 0 
Gene Names: SPTA1 (SPTA)
Find proteins for P02549 (Homo sapiens)
Go to Gene View: SPTA1
Go to UniProtKB:  P02549
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Spectrin beta chain, erythrocyte
B
185Homo sapiensMutation(s): 0 
Gene Names: SPTB (SPTB1)
Find proteins for P11277 (Homo sapiens)
Go to Gene View: SPTB
Go to UniProtKB:  P11277
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.268 
  • Space Group: I 41
Unit Cell:
Length (Å)Angle (°)
a = 213.901α = 90.00
b = 213.901β = 90.00
c = 31.461γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SHARPphasing
SCALAdata scaling
MAR345data collection
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-03-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description