NMR structure of KMP11 in DPC micelle

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 15 
  • Selection Criteria: target function 

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Kinetoplastid membrane protein-11 adopts a four-helix bundle fold in DPC micelle.

Lim, L.Z.Ee, S.Fu, J.Tan, Y.He, C.Y.Song, J.

(2017) FEBS Lett 591: 3793-3804

  • DOI: https://doi.org/10.1002/1873-3468.12891
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Kinetoplastid membrane protein-11 (KMP11) is a membrane-associated surface protein of kinetoplastids, which has a strong antigenicity but no mammalian homolog, thus representing a promising vaccine candidate. Here, by CD and NMR, we revealed that in buffer, KMP11 assumes a highly helical conformation without stable tertiary packing. Remarkably, upon interacting with dodecylphosphocholine (DPC) micelle, despite minor changes in secondary structures, KMP11 undergoes rearrangements to form a defined structure. We found that its three-dimensional structure unexpectedly adopts the classic four-helix bundle fold. The surface constituted by the N-/C-termini and conserved loop was characterized to dynamically interact with the polar phase of DPC micelle. Our results provide a structural basis for understanding KMP11 functions and further offer a promising avenue for engineering better vaccines.

  • Organizational Affiliation

    Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kinetoplastid membrane protein 11100Trypanosoma brucei bruceiMutation(s): 0 
Gene Names: KMP-11/1KMP-11/2KMP-11/3KMP-11/4
Find proteins for P69300 (Trypanosoma brucei brucei)
Explore P69300 
Go to UniProtKB:  P69300
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69300
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 15 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Ministry of Education (Singapore)SingaporeMOE2015 T2 1 111

Revision History  (Full details and data files)

  • Version 1.0: 2018-02-07
    Type: Initial release
  • Version 1.1: 2023-06-14
    Changes: Data collection, Database references, Other