Solution Structure of Domain-Swapped GLPG

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

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This is version 1.2 of the entry. See complete history


Micelle-Catalyzed Domain Swapping in the GlpG Rhomboid Protease Cytoplasmic Domain.

Ghasriani, H.Kwok, J.K.Sherratt, A.R.Foo, A.C.Qureshi, T.Goto, N.K.

(2014) Biochemistry 53: 5907-5915

  • DOI: https://doi.org/10.1021/bi500919v
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Three-dimensional domain swapping is a mode of self-interaction that can give rise to altered functional states and has been identified as the trigger event in some protein deposition diseases, yet rates of interconversion between oligomeric states are usually slow, with the requirement for transient disruption of an extensive network of interactions giving rise to a large kinetic barrier. Here we demonstrate that the cytoplasmic domain of the Escherichia coli GlpG rhomboid protease undergoes slow dimerization via domain swapping and that micromolar concentrations of micelles can be used to enhance monomer-dimer exchange rates by more than 1000-fold. Detergents bearing a phosphocholine headgroup are shown to be true catalysts, with hexadecylphosphocholine reducing the 26 kcal/mol free energy barrier by >11 kcal/mol while preserving the 5 kcal/mol difference between monomer and dimer states. Catalysis involves the formation of a micelle-bound intermediate with a partially unfolded structure that is primed for domain swapping. Taken together, these results are the first to demonstrate true catalysis for domain swapping, by using micelles that work in a chaperonin-like fashion to unfold a kinetically trapped state and allow access to the domain-swapped form.

  • Organizational Affiliation

    Department of Chemistry and ‡Department of Biochemistry, Microbiology and Immunology, University of Ottawa , Ottawa, Ontario, Canada K1N 6N5.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Rhomboid protease GlpG
A, B
69Escherichia coliMutation(s): 0 
Gene Names: ECS4267glpGGLPG1LF82_0869
Find proteins for E2QFS2 (Escherichia coli)
Explore E2QFS2 
Go to UniProtKB:  E2QFS2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupE2QFS2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-11-12
    Type: Initial release
  • Version 1.1: 2023-06-14
    Changes: Database references, Other
  • Version 1.2: 2024-05-15
    Changes: Data collection, Database references