2PTL

THREE-DIMENSIONAL SOLUTION STRUCTURE OF AN IMMUNOGLOBULIN LIGHT CHAIN-BINDING DOMAIN OF PROTEIN L. COMPARISON WITH THE IGG-BINDING DOMAINS OF PROTEIN G


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 21 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Three-dimensional solution structure of an immunoglobulin light chain-binding domain of protein L. Comparison with the IgG-binding domains of protein G.

Wikstrom, M.Drakenberg, T.Forsen, S.Sjobring, U.Bjorck, L.

(1994) Biochemistry 33: 14011-14017


  • PubMed Abstract: 
  • Protein L is a multidomain protein expressed at the surface of some strains of the anaerobic bacterial species Peptostreptococcus magnus. It has affinity for immunoglobulin (Ig) through interaction with framework structures in the variable Ig light c ...

    Protein L is a multidomain protein expressed at the surface of some strains of the anaerobic bacterial species Peptostreptococcus magnus. It has affinity for immunoglobulin (Ig) through interaction with framework structures in the variable Ig light chain domain. The Ig-binding activity is located to five homologous repeats called B1-B5 in the N-terminal part of the protein. We have determined the three-dimensional solution structure of the 76 amino acid residue long B1 domain using NMR spectroscopy and distance geometry-restrained simulated annealing. The domain is composed of a 15 amino acid residue long disordered N-terminus followed by a folded portion comprising an alpha-helix packed against a four-stranded beta-sheet. These secondary structural elements are well determined with a backbone atomic root mean square deviation from their mean of 0.54 A. The B domains of protein L show very limited sequence homology to the domains of streptococcal protein G interacting with the heavy chains of IgG. However, despite this fact, and their different binding properties, the fold of the B1 domain was found to be similar to the fold of the IgG-binding protein G domains [Wikström, M., Sjöbring, U., Kastern, W., Björck, L., Drakenberg, T., & Forsén, S. (1993) Biochemistry 32, 3381-3386]. In the present study, the solution structure of the B1 domain enabled a more detailed comparison which can explain the different Ig-binding specificities of these two bacterial surface proteins. Among the differences observed, the alpha-helix orientation is the most striking.(ABSTRACT TRUNCATED AT 250 WORDS)


    Related Citations: 
    • Proton Nuclear Magnetic Resonance Sequential Assignments and Secondary Structure of an Immunoglobulin Light Chain-Binding Domain of Protein L
      Wikstroem, M.,Sjoebring, U.,Kastern, W.,Bjoerck, L.,Drakenberg, T.,Forsen, S.
      (1993) Biochemistry 32: 3381


    Organizational Affiliation

    Department of Physical Chemistry 2, Lund University, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN L
A
78Finegoldia magnaMutation(s): 0 
Find proteins for Q53291 (Finegoldia magna)
Go to UniProtKB:  Q53291
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 21 
  • Olderado: 2PTL 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: 1994-10-15
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other