5HQI

Insulin with proline analog HzP at position B28 in the T2 state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.97 Å
  • R-Value Free: 0.158 
  • R-Value Work: 0.139 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

4S-Hydroxylation of Insulin at ProB28 Accelerates Hexamer Dissociation and Delays Fibrillation.

Lieblich, S.A.Fang, K.Y.Cahn, J.K.B.Rawson, J.LeBon, J.Ku, H.T.Tirrell, D.A.

(2017) J. Am. Chem. Soc. 139: 8384-8387

  • DOI: 10.1021/jacs.7b00794
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Daily injections of insulin provide lifesaving benefits to millions of diabetics. But currently available prandial insulins are suboptimal: The onset of action is delayed by slow dissociation of the insulin hexamer in the subcutaneous space, and insu ...

    Daily injections of insulin provide lifesaving benefits to millions of diabetics. But currently available prandial insulins are suboptimal: The onset of action is delayed by slow dissociation of the insulin hexamer in the subcutaneous space, and insulin forms amyloid fibrils upon storage in solution. Here we show, through the use of noncanonical amino acid mutagenesis, that replacement of the proline residue at position 28 of the insulin B-chain (ProB28) by (4S)-hydroxyproline (Hzp) yields an active form of insulin that dissociates more rapidly, and fibrillates more slowly, than the wild-type protein. Crystal structures of dimeric and hexameric insulin preparations suggest that a hydrogen bond between the hydroxyl group of Hzp and a backbone amide carbonyl positioned across the dimer interface may be responsible for the altered behavior. The effects of hydroxylation are stereospecific; replacement of ProB28 by (4R)-hydroxyproline (Hyp) causes little change in the rates of fibrillation and hexamer disassociation. These results demonstrate a new approach that fuses the concepts of medicinal chemistry and protein design, and paves the way to further engineering of insulin and other therapeutic proteins.


    Organizational Affiliation

    Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Insulin A-Chain
A
21Homo sapiensMutation(s): 0 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Go to Gene View: INS
Go to UniProtKB:  P01308
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Insulin B-Chain
B
30Homo sapiensMutation(s): 0 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Go to Gene View: INS
Go to UniProtKB:  P01308
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
HZP
Query on HZP
B
L-peptide linkingC5 H9 N O3PRO
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.97 Å
  • R-Value Free: 0.158 
  • R-Value Work: 0.139 
  • Space Group: I 21 3
Unit Cell:
Length (Å)Angle (°)
a = 78.234α = 90.00
b = 78.234β = 90.00
c = 78.234γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
PHASERphasing
REFMACrefinement
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Novo NordiskDenmark--

Revision History 

  • Version 1.0: 2017-01-25
    Type: Initial release
  • Version 1.1: 2017-07-12
    Type: Database references