Solution structure of the fkbp-domain of Legionella pneumophila Mip

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 10 
  • Selection Criteria: ENERGY 

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This is version 1.3 of the entry. See complete history


Domain Motions of the Mip Protein from Legionella Pneumophila

Horstmann, M.Ehses, P.Schweimer, K.Steinert, M.Kamphausen, T.Fischer, G.Hacker, J.Rosch, P.Faber, C.

(2006) Biochemistry 45: 12303

  • DOI: https://doi.org/10.1021/bi060818i
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The homodimeric 45.6 kDa (total mass) Mip protein, a virulence factor from Legionella pneumophila, was investigated with solution NMR spectroscopy and molecular dynamics (MD) simulations. Two Mip monomers are dimerized via an N-terminal helix bundle that is connected via a long alpha-helix to a C-terminal FKBP domain in each subunit. More than 85% of the amino acids were identified in triple-resonance NMR spectra. (15)N relaxation analysis showed a bimodal distribution of R(1)/R(2) values, with the lower ratio in the N-terminal domain. Relaxation dispersion measurements confirmed that these reduced ratios did not originate from conformational exchange. Thus, two different correlation times (tau(c)) can be deduced, reflecting partly uncoupled motions of both domains. Relaxation data of a Mip(77)(-)(213) monomer mutant were similar to those observed in the dimer, corroborating that the FKBP domain, including part of the connecting helix, behaves as one dynamic entity. MD simulations (18 ns) of the Mip dimer also yielded two different correlation times for the two domains and thus confirm the independence of the domain motions. Principal component analysis of the dihedral space covariance matrix calculated from the MD trajectory suggests a flexible region in the long connecting helix that acts as a hinge between the two domains. Such motion provides a possible explanation of how Mip can bind to complex molecular components of the extracellular matrix and mediate alveolar damage and bacterial spread in the lung.

  • Organizational Affiliation

    Lehrstuhl für Experimentelle Physik 5, Universität Würzburg, Würzburg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MACROPHAGE INFECTIVITY POTENTIATOR137Legionella pneumophilaMutation(s): 0 
Find proteins for Q5ZXE0 (Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513))
Explore Q5ZXE0 
Go to UniProtKB:  Q5ZXE0
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UniProt GroupQ5ZXE0
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 10 
  • Selection Criteria: ENERGY 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-06-12
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-06-14
    Changes: Structure summary