1AJ3

SOLUTION STRUCTURE OF THE SPECTRIN REPEAT, NMR, 20 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 20 
  • Selection Criteria: ENERGY, GEOMETRY, VIOLATIONS 

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This is version 1.2 of the entry. See complete history

Literature

Solution structure of the spectrin repeat: a left-handed antiparallel triple-helical coiled-coil.

Pascual, J.Pfuhl, M.Walther, D.Saraste, M.Nilges, M.

(1997) J.Mol.Biol. 273: 740-751

  • DOI: 10.1006/jmbi.1997.1344

  • PubMed Abstract: 
  • Cytoskeletal proteins belonging to the spectrin family have an elongated structure composed of repetitive units. The three-dimensional solution structure of the 16th repeat from chicken brain alpha-spectrin (R16) has been determined by NMR spectrosco ...

    Cytoskeletal proteins belonging to the spectrin family have an elongated structure composed of repetitive units. The three-dimensional solution structure of the 16th repeat from chicken brain alpha-spectrin (R16) has been determined by NMR spectroscopy and distance geometry-simulated annealing calculations. We used a total of 1035 distance restraints, which included 719 NOE-based values obtained by applying the ambiguous restraints for iterative assignment (ARIA) method. In addition, we performed a direct refinement against 1H-chemical shifts. The final ensemble of 20 structures shows an average RMSD of 1.52 A from the mean for the backbone atoms, excluding loops and N and C termini. R16 is made up of three antiparallel alpha-helices separated by two loops, and folds into a left-handed coiled-coil. The basic unit of spectrin is an antiparallel heterodimer composed of two homologous chains, beta and alpha. These assemble a tetramer via a mechanism that relies on the completion of a single repeat by association of the partial repeats located at the C terminus of the beta-chain (two helices) and at the N terminus of the alpha-chain (one helix). This tetramer is the assemblage able to cross-link actin filaments. Model building by homology of the "tetramerization" repeat from human erythrocyte spectrin illuminates the possible role of point mutations which cause hemolytic anemias.


    Organizational Affiliation

    European Molecular Biology Laboratory, Meyerhofstr. 1, Heidelberg, 69012, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA SPECTRIN
A
110Gallus gallusGene Names: SPTAN1 (SPTA2)
Find proteins for P07751 (Gallus gallus)
Go to Gene View: SPTAN1
Go to UniProtKB:  P07751
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 20 
  • Selection Criteria: ENERGY, GEOMETRY, VIOLATIONS 
  • Olderado: 1AJ3 Olderado
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
X-PLORmodel building

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-07-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance