5BPO

Human insulin with intra-chain chemical crosslink between modified B27 and B29


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.239 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Rational steering of insulin binding specificity by intra-chain chemical crosslinking.

Vikova, J.Collinsova, M.Kletvikova, E.Budesinsky, M.Kaplan, V.Zakova, L.Veverka, V.Hexnerova, R.Avino, R.J.Strakova, J.Selicharova, I.Vanek, V.Wright, D.W.Watson, C.J.Turkenburg, J.P.Brzozowski, A.M.Jiracek, J.

(2016) Sci Rep 6: 19431-19431

  • DOI: https://doi.org/10.1038/srep19431
  • Primary Citation of Related Structures:  
    2N2V, 2N2W, 2N2X, 5BOQ, 5BPO, 5BQQ

  • PubMed Abstract: 

    Insulin is a key hormone of human metabolism with major therapeutic importance for both types of diabetes. New insulin analogues with more physiological profiles and better glycemic control are needed, especially analogues that preferentially bind to the metabolic B-isoform of insulin receptor (IR-B). Here, we aimed to stabilize and modulate the receptor-compatible conformation of insulin by covalent intra-chain crosslinking within its B22-B30 segment, using the Cu(I)-catalyzed Huisgen 1,3-dipolar cycloaddition reaction of azides and alkynes. This approach resulted in 14 new, systematically crosslinked insulin analogues whose structures and functions were extensively characterized and correlated. One of the analogues, containing a B26-B29 triazole bridge, was highly active in binding to both IR isoforms, with a significant preference for IR-B. Our results demonstrate the potential of chemistry-driven modulation of insulin function, also shedding new light on the functional importance of hormone's B-chain C-terminus for its IR-B specificity.


  • Organizational Affiliation

    Institute of Organic Chemistry and Biochemistry, the Czech Academy of Sciences, v.v.i., Flemingovo n. 2, 166 10 Praha 6, Czech Republic.


Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Insulin
A, C
21Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P01308 (Homo sapiens)
Explore P01308 
Go to UniProtKB:  P01308
PHAROS:  P01308
GTEx:  ENSG00000254647 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01308
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, D
30Homo sapiensMutation(s): 2 
UniProt & NIH Common Fund Data Resources
Find proteins for P01308 (Homo sapiens)
Explore P01308 
Go to UniProtKB:  P01308
PHAROS:  P01308
GTEx:  ENSG00000254647 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01308
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  2 Unique
IDChains TypeFormula2D DiagramParent
HIX
Query on HIX
B, D
L-PEPTIDE LINKINGC5 H8 N4 O2ALA
NVA
Query on NVA
B, D
L-PEPTIDE LINKINGC5 H11 N O2VAL
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.239 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.103α = 90
b = 45.968β = 128.5
c = 43.929γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
xia2data reduction
XDSdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-02-03
    Type: Initial release
  • Version 1.1: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Refinement description