1BZV

[D-ALAB26]-DES(B27-B30)-INSULIN-B26-AMIDE A SUPERPOTENT SINGLE-REPLACEMENT INSULIN ANALOGUE, NMR, MINIMIZED AVERAGE STRUCTURE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 16 
  • Conformers Submitted: 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The solution structure of a superpotent B-chain-shortened single-replacement insulin analogue.

Kurapkat, G.Siedentop, M.Gattner, H.G.Hagelstein, M.Brandenburg, D.Grotzinger, J.Wollmer, A.

(1999) Protein Sci. 8: 499-508

  • DOI: 10.1110/ps.8.3.499

  • PubMed Abstract: 
  • This paper reports on an insulin analogue with 12.5-fold receptor affinity, the highest increase observed for a single replacement, and on its solution structure, determined by NMR spectroscopy. The analogue is [D-AlaB26]des-(B27-B30)-tetrapeptide-in ...

    This paper reports on an insulin analogue with 12.5-fold receptor affinity, the highest increase observed for a single replacement, and on its solution structure, determined by NMR spectroscopy. The analogue is [D-AlaB26]des-(B27-B30)-tetrapeptide-insulin-B26-amide. C-terminal truncation of the B-chain by four (or five) residues is known not to affect the functional properties of insulin, provided the new carboxylate charge is neutralized. As opposed to the dramatic increase in receptor affinity caused by the substitution of D-Ala for the wild-type residue TyrB26 in the truncated molecule, this very substitution reduces it to only 18% of that of the wild-type hormone when the B-chain is present in full length. The insulin molecule in solution is visualized as an ensemble of conformers interrelated by a dynamic equilibrium. The question is whether the "active" conformation of the hormone, sought after in innumerable structure/function studies, is or is not included in the accessible conformational space, so that it could be adopted also in the absence of the receptor. If there were any chance for the active conformation, or at least a predisposed state to be populated to a detectable extent, this chance should be best in the case of a superpotent analogue. This was the motivation for the determination of the three-dimensional structure of [D-AlaB26]des-(B27-B30)-tetrapeptide-insulin-B26-amide. However, neither the NMR data nor CD spectroscopic comparison of a number of related analogues provided a clue concerning structural features predisposing insulin to high receptor affinity. After the present study it seems more likely than before that insulin will adopt its active conformation only when exposed to the force field of the receptor surface.


    Organizational Affiliation

    Institut für Biochemie, Rheinisch-Westfälische Technische Hochschule Aachen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INSULIN
A
21Balaenoptera physalusGene Names: INS
Find proteins for P67973 (Balaenoptera physalus)
Go to Gene View: INS
Go to UniProtKB:  P67973
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
INSULIN
B
26Pan troglodytesGene Names: INS
Find proteins for P30410 (Pan troglodytes)
Go to Gene View: INS
Go to UniProtKB:  P30410
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
DAL
Query on DAL
B
D-PEPTIDE LINKINGC3 H7 N O2

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 16 
  • Conformers Submitted: 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-05-18
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other