7ELJ

Prion Derived Tetrapeptide Stabilizes Thermolabile Insulin via Conformational Trapping


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 10 
  • Conformers Submitted: 
  • Selection Criteria: all calculated structures submitted 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Prion-derived tetrapeptide stabilizes thermolabile insulin via conformational trapping.

Mukherjee, M.Das, D.Sarkar, J.Banerjee, N.Jana, J.Bhat, J.Reddy G, J.Bharatam, J.Chattopadhyay, S.Chatterjee, S.Chakrabarti, P.

(2021) iScience 24: 102573-102573

  • DOI: https://doi.org/10.1016/j.isci.2021.102573
  • Primary Citation of Related Structures:  
    7ELJ

  • PubMed Abstract: 

    Unfolding followed by fibrillation of insulin even in the presence of various excipients grappled with restricted clinical application. Thus, there is an unmet need for better thermostable, nontoxic molecules to preserve bioactive insulin under varying physiochemical perturbations. In search of cross-amyloid inhibitors, prion-derived tetrapeptide library screening reveals a consensus V(X)YR motif for potential inhibition of insulin fibrillation. A tetrapeptide VYYR, isosequential to the β2-strand of prion, effectively suppresses heat- and storage-induced insulin fibrillation and maintains insulin in a thermostable bioactive form conferring adequate glycemic control in mouse models of diabetes and impedes insulin amyloidoma formation. Besides elucidating the critical insulin-IS1 interaction (R4 of IS1 to the N24 insulin B-chain) by nuclear magnetic resonance spectroscopy, we further demonstrated non-canonical dimer-mediated conformational trapping mechanism for insulin stabilization. In this study, structural characterization and preclinical validation introduce a class of tetrapeptide toward developing thermostable therapeutically relevant insulin formulations.


  • Organizational Affiliation

    Department of Biophysics, Bose Institute, Kolkata, India.


Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Insulin A Chain21Bos taurusMutation(s): 0 
UniProt
Find proteins for P01317 (Bos taurus)
Explore P01317 
Go to UniProtKB:  P01317
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01317
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Insulin B chain30Bos taurusMutation(s): 0 
UniProt
Find proteins for P01317 (Bos taurus)
Explore P01317 
Go to UniProtKB:  P01317
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01317
Sequence Annotations
Expand
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
IS14Homo sapiensMutation(s): 0 
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 10 
  • Conformers Submitted: 
  • Selection Criteria: all calculated structures submitted 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Released Date: 2021-04-28 
  • Deposition Author(s): Banerjee, N.

Revision History  (Full details and data files)

  • Version 1.0: 2021-04-28
    Type: Initial release
  • Version 1.1: 2021-07-07
    Changes: Database references
  • Version 1.2: 2024-05-15
    Changes: Data collection, Database references