5BQQ

Human insulin with intra-chain chemical crosslink between modified B27 and B30


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.163 

wwPDB Validation   3D Report Full Report



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: 10.1038/srep19431
  • Primary Citation of Related Structures:  
    2N2X, 2N2W, 2N2V, 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 ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
InsulinACEGIK21Homo sapiensMutation(s): 0 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Explore P01308 
Go to UniProtKB:  P01308
NIH Common Fund Data Resources
PHAROS  P01308
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
InsulinBDFHJL30Homo sapiensMutation(s): 1 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Explore P01308 
Go to UniProtKB:  P01308
NIH Common Fund Data Resources
PHAROS  P01308
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.163 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.992α = 90
b = 60.992β = 90
c = 81.919γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
MOLREPphasing
Aimlessdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-02-03
    Type: Initial release