1Q10

Ensemble of 40 Structures of the Dimeric Mutant of the B1 Domain of Streptococcal Protein G


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 40 
  • Selection Criteria: structures with the lowest energy,target function 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A Protein Contortionist: Core Mutations of GB1 that Induce Dimerization and Domain Swapping

Byeon, I.J.Louis, J.M.Gronenborn, A.M.

(2003) J.Mol.Biol. 333: 141-152


  • PubMed Abstract: 
  • Immunoglobulin-binding domain B1 of streptococcal protein G (GB1), a small (56 residues), stable, single-domain protein, is one of the most extensively used model systems in the area of protein folding and design. Recently, NMR and X-ray structures o ...

    Immunoglobulin-binding domain B1 of streptococcal protein G (GB1), a small (56 residues), stable, single-domain protein, is one of the most extensively used model systems in the area of protein folding and design. Recently, NMR and X-ray structures of a quintuple GB1 core mutant (L5V/A26F/F30V/Y33F/A34F) that showed an unexpected, intertwined tetrameric architecture were determined. Here, we report the NMR structure of another mutant, derived from the tetramer by reverting the single amino acid position F26 back to the wild-type sequence A26. The structure reveals a domain-swapped dimer that involves exchange of the second beta-hairpin. The resulting overall structure comprises an eight-stranded beta-sheet whose concave side is covered by two alpha helices. The dimer dissociates into a partially folded, monomeric species with a dissociation constant of 93(+/-10)microM.


    Related Citations: 
    • A Novel, Highly Stable Fold of the Immunoglobulin Binding Domain of Streptococcal Protein G
      Gronenborn, A.M.,Filpula, D.R.,Essig, N.Z.,Achari, A.,Whitlow, M.,Wingfield, P.T.,Clore, G.M.
      (1991) Science 253: 657
    • Core Mutations Switch Monomeric Protein GB1 Into an Intertwined Tetramer
      Frank, M.K.,Dyda, F.,Dobrodumov, A.,Gronenborn, A.M.
      (2002) Nat.Struct.Mol.Biol. 9: 877


    Organizational Affiliation

    Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Building 5, Room 130, Bethesda, MD 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Immunoglobulin G binding protein G
A, B
56Streptococcus sp. group GGene Names: spg
Find proteins for P06654 (Streptococcus sp. group G)
Go to UniProtKB:  P06654
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 40 
  • Selection Criteria: structures with the lowest energy,target function 
  • Olderado: 1Q10 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-10-14
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance