1GAB

STRUCTURE OF AN ALBUMIN-BINDING DOMAIN, NMR, 20 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: CONSTRAINT VIOLATIONS 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Solution structure of the albumin-binding GA module: a versatile bacterial protein domain.

Johansson, M.U.de Chateau, M.Wikstrom, M.Forsen, S.Drakenberg, T.Bjorck, L.

(1997) J Mol Biol 266: 859-865

  • DOI: 10.1006/jmbi.1996.0856
  • Primary Citation of Related Structures:  
    1GAB, 1PRB

  • PubMed Abstract: 
  • The albumin-binding GA module is found in a family of surface proteins of different bacterial species. It comprises 45 amino acid residues and represents the first known example of contemporary module shuffling. Using 1H NMR spectroscopy we have dete ...

    The albumin-binding GA module is found in a family of surface proteins of different bacterial species. It comprises 45 amino acid residues and represents the first known example of contemporary module shuffling. Using 1H NMR spectroscopy we have determined the solution structure of the GA module from protein PAB, a protein of the anaerobic human commensal and pathogen Peptostreptococcus magnus. This structure, the first three-dimensional structure of an albumin-binding protein domain described, was shown to be composed of a left-handed three-helix-bundle. Sequence differences between GA modules with different affinities for albumin indicated that a conserved region in the C-terminal part of the second helix and the flexible sequence between helices 2 and 3 could contribute to the albumin-binding activity. The effect on backbone amide proton exchange rates upon binding to albumin support this assumption. The GA module has a fold that is strikingly similar to the immunoglobulin-binding domains of staphylococcal protein A but it shows no resemblance to the fold shared by the immunoglobulin-binding domains of streptococcal protein G and peptostreptococcal protein L. When the gene sequences, binding properties and thermal stability of these four domains are analysed in relation to their global folds an evolutionary pattern emerges. Thus, in the evolution of novel binding properties mutations are allowed only as long as the energetically favourable global fold is maintained.


    Related Citations: 
    • The Ga Module, a Mobile Albumin-Binding Bacterial Domain, Adopts a Three-Helix-Bundle Structure
      Johansson, M.U., De Chateau, M., Bjorck, L., Forsen, S., Drakenberg, T., Wikstrom, M.
      (1995) FEBS Lett 374: 257

    Organizational Affiliation

    Department of Physical Chemistry, Lund University, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN PABA53Finegoldia magna ATCC 29328Mutation(s): 0 
Find proteins for Q51911 (Finegoldia magna)
Explore Q51911 
Go to UniProtKB:  Q51911
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: CONSTRAINT VIOLATIONS 
  • OLDERADO: 1GAB Olderado

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
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance