1DEI

DESHEPTAPEPTIDE (B24-B30) INSULIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.196 

wwPDB Validation   3D Report Full Report


This is version 1.3 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 U S A 94: 2975-2980

  • DOI: https://doi.org/10.1073/pnas.94.7.2975
  • Primary Citation of Related Structures:  
    1DEI

  • 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 structural framework, while great conformational changes occur in the N and C termini of B-chain ...

    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: 
    • 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 B 30: 55
    • 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 B 25: 385

    Organizational Affiliation

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



Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
INSULIN
A, C
21Sus scrofaMutation(s): 0 
Gene Names: INS
UniProt
Find proteins for P01315 (Sus scrofa)
Explore P01315 
Go to UniProtKB:  P01315
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01315
Protein Feature View
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
INSULIN
B, D
23Sus scrofaMutation(s): 0 
Gene Names: INS
UniProt
Find proteins for P01315 (Sus scrofa)
Explore P01315 
Go to UniProtKB:  P01315
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01315
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.196 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.4α = 90
b = 56.3β = 90
c = 23γ = 90
Software Package:
Software NamePurpose
PROTEINdata collection
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-06-16
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-03-07
    Changes: Data collection, Other