5AZZ

Crystal structure of seleno-insulin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.168 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Preparation of Selenoinsulin as a Long-Lasting Insulin Analogue.

Arai, K.Takei, T.Okumura, M.Watanabe, S.Amagai, Y.Asahina, Y.Moroder, L.Hojo, H.Inaba, K.Iwaoka, M.

(2017) Angew. Chem. Int. Ed. Engl. 56: 5522-5526

  • DOI: 10.1002/anie.201701654

  • PubMed Abstract: 
  • Synthetic insulin analogues with a long lifetime are current drug targets for the therapy of diabetic patients. The replacement of the interchain disulfide with a diselenide bridge, which is more resistant to reduction and internal bond rotation, can ...

    Synthetic insulin analogues with a long lifetime are current drug targets for the therapy of diabetic patients. The replacement of the interchain disulfide with a diselenide bridge, which is more resistant to reduction and internal bond rotation, can enhance the lifetime of insulin in the presence of the insulin-degrading enzyme (IDE) without impairing the hormonal function. The [C7UA ,C7UB ] variant of bovine pancreatic insulin (BPIns) was successfully prepared by using two selenocysteine peptides (i.e., the C7U analogues of A- and B-chains, respectively). In a buffer solution at pH 10 they spontaneously assembled under thermodynamic control to the correct insulin fold. The selenoinsulin (Se-Ins) exhibited a bioactivity comparable to that of BPIns. Interestingly, degradation of Se-Ins with IDE was significantly decelerated (τ1/2 ≈8 h vs. ≈1 h for BPIns). The lifetime enhancement could be due to both the intrinsic stability of the diselenide bond and local conformational changes induced by the substitution.


    Organizational Affiliation

    Department of Chemistry, School of Science, Tokai University, Kitakaname, Hiratsuka-shi, Kanagawa, 259-1292, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Insulin A chain
A
22Bos taurusMutation(s): 1 
Gene Names: INS
Find proteins for P01317 (Bos taurus)
Go to Gene View: INS
Go to UniProtKB:  P01317
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Insulin B chain
B
31Bos taurusMutation(s): 1 
Gene Names: INS
Find proteins for P01317 (Bos taurus)
Go to Gene View: INS
Go to UniProtKB:  P01317
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.168 
  • Space Group: I 21 3
Unit Cell:
Length (Å)Angle (°)
a = 77.994α = 90.00
b = 77.994β = 90.00
c = 77.994γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
PHENIXrefinement
SHELXDEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-05-03
    Type: Initial release
  • Version 1.1: 2017-06-14
    Type: Database references