1DEI

DESHEPTAPEPTIDE (B24-B30) INSULIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of desheptapeptide(B24-B30)insulin at 1.6 A resolution: implications for receptor binding.

Bao, S.J.Xie, D.L.Zhang, J.P.Chang, W.R.Liang, D.C.

(1997) Proc.Natl.Acad.Sci.USA 94: 2975-2980


  • PubMed Abstract: 
  • The crystal structure of desheptapeptide (B24-B30) insulin (DHPI), a virtually inactive analog of insulin, was determined at 1.6 A resolution. In the refined structure model, DHPI retains three alpha-helices (A1-A8, A12-A18, and B9-B19) as its struct ...

    The crystal structure of desheptapeptide (B24-B30) insulin (DHPI), a virtually inactive analog of insulin, was determined at 1.6 A resolution. In the refined structure model, DHPI retains three alpha-helices (A1-A8, A12-A18, and B9-B19) as its structural framework, while great conformational changes occur in the N and C termini of B-chain. The beta-turn, which lies in B20-B30 in insulin and insulin analogs with high potency, no longer exists in DHPI. Relative motion is observed among the three alpha-helices, each as a rigid functional group. In contrast, a region covering B5-B6 and A6-A11 exhibits a relatively stable conformation. We interpret our results as identifying: (i) the importance of beta-turn in determining the receptor-binding potency of insulin and (ii) a leading role of PheB24 in maintaining the beta-turn structure.


    Related Citations: 
    • Crystallographic Studies on Desheptapeptide(B24-B30) Insulin-Growth of Single Crystals and Determination of its Crystallographic Parameters
      Chang, W.R.,Xie, D.L.,Liang, D.C.,al., et
      (1982) Sci.Sin., Ser.B (Engl.Ed.) 25: 385
    • Refinement of the Structure of Despentapeptide (B26-B30) Insulin at 1.5 Angstroms Resolution
      Dai, J.B.,Lou, M.Z.,You, J.M.,Liang, D.C.
      (1987) Sci.Sin., Ser.B (Engl.Ed.) 30: 55


    Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INSULIN
A, C
21Sus scrofaGene Names: INS
Find proteins for P01315 (Sus scrofa)
Go to Gene View: INS
Go to UniProtKB:  P01315
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
INSULIN
B, D
23Sus scrofaGene Names: INS
Find proteins for P01315 (Sus scrofa)
Go to Gene View: INS
Go to UniProtKB:  P01315
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.196 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 57.400α = 90.00
b = 56.300β = 90.00
c = 23.000γ = 90.00
Software Package:
Software NamePurpose
PROTEINdata collection
X-PLORmodel building
X-PLORphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-06-16
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance