2LCB

Solution Structure of a Minor and Transiently Formed State of a T4 Lysozyme Mutant


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 9600 
  • Conformers Submitted: 10 
  • Selection Criteria: Two Step Selection Criteria based on chemical shift score and Rosetta energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Solution structure of a minor and transiently formed state of a T4 lysozyme mutant.

Bouvignies, G.Vallurupalli, P.Hansen, D.F.Correia, B.E.Lange, O.Bah, A.Vernon, R.M.Dahlquist, F.W.Baker, D.Kay, L.E.

(2011) Nature 477: 111-114

  • DOI: 10.1038/nature10349
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Proteins are inherently plastic molecules, whose function often critically depends on excursions between different molecular conformations (conformers). However, a rigorous understanding of the relation between a protein's structure, dynamics and fun ...

    Proteins are inherently plastic molecules, whose function often critically depends on excursions between different molecular conformations (conformers). However, a rigorous understanding of the relation between a protein's structure, dynamics and function remains elusive. This is because many of the conformers on its energy landscape are only transiently formed and marginally populated (less than a few per cent of the total number of molecules), so that they cannot be individually characterized by most biophysical tools. Here we study a lysozyme mutant from phage T4 that binds hydrophobic molecules and populates an excited state transiently (about 1 ms) to about 3% at 25 °C (ref. 5). We show that such binding occurs only via the ground state, and present the atomic-level model of the 'invisible', excited state obtained using a combined strategy of relaxation-dispersion NMR (ref. 6) and CS-Rosetta model building that rationalizes this observation. The model was tested using structure-based design calculations identifying point mutants predicted to stabilize the excited state relative to the ground state. In this way a pair of mutations were introduced, inverting the relative populations of the ground and excited states and altering function. Our results suggest a mechanism for the evolution of a protein's function by changing the delicate balance between the states on its energy landscape. More generally, they show that our approach can generate and validate models of excited protein states.


    Organizational Affiliation

    Department of Molecular Genetics, The University of Toronto, Toronto, Ontario M5S 1A8, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lysozyme
A
164Enterobacteria phage T4Mutations: A97C, A99L, T54C
Gene Names: E
EC: 3.2.1.17
Find proteins for P00720 (Enterobacteria phage T4)
Go to UniProtKB:  P00720
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 9600 
  • Conformers Submitted: 10 
  • Selection Criteria: Two Step Selection Criteria based on chemical shift score and Rosetta energy 
  • Olderado: 2LCB Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-08-17
    Type: Initial release
  • Version 1.1: 2011-09-07
    Type: Database references