1EV6

Structure of the monoclinic form of the M-cresol/insulin R6 hexamer

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 

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This is version 1.2 of the entry. See complete history. 


Literature

R6 Hexameric Insulin Complexed with m-Cresol or Resorcinol

Smith, G.D., Ciszak, E., Magrum, L.A., Pangborn, W.A., Blessing, R.H.

(2000) Biochem Biophys Res Commun 56: 1541-1548

  • DOI: 10.1107/s0907444900012749
  • Primary Citation of Related Structures:  
    1EV6, 1EV3, 1EVR

  • PubMed Abstract: 

    • The structures of three R(6) human insulin hexamers have been determined. Crystals of monoclinic m-cresol-insulin, monoclinic resorcinol-insulin and rhombohedral m-cresol-insulin diffracted to 1. 9, 1.9 and 1.78 A, respectively, and have been refined ...

    The structures of three R(6) human insulin hexamers have been determined. Crystals of monoclinic m-cresol-insulin, monoclinic resorcinol-insulin and rhombohedral m-cresol-insulin diffracted to 1. 9, 1.9 and 1.78 A, respectively, and have been refined to residuals of 0.195, 0.179 and 0.200, respectively. In all three structures, a phenolic derivative is found to occupy the phenolic binding site, where it forms hydrogen bonds to the carbonyl O atom of CysA6 and the N atom of CysA11. Two additional phenolic derivative binding sites were identified within or between hexamers. The structures of all three hexamers are nearly identical, although a large displacement of the N-terminus of one B chain in both monoclinic structures results from coordination to a sodium ion which is located between symmetry-related hexamers. Other minor differences in structure arise from differences in packing in the monoclinic cell compared with the rhombohedral cell. Based upon the differences in conformation of the GluB13 side chains in T(6), T(3)R(f)(3) and R(6) hexamers, the deprotonation of these side chains appears to be associated with the T-->R conformational transition.

    Related Citations: 
    • Phenol Stabilizes more Helix in a New Symmetrical Zinc Insulin Hexamer
      Derewenda, U., Derewenda, Z., Dodson, E.J., Dodson, G.G., Reynolds, C.D., Smith, G.D., Sparks, C., Swenson, D.
      (1989) Nature 338: 594
    • Structure of a Rhombohedral R6 Insulin/Phenol Complex
      Smith, G.D., Dodson, G.G.
      (1992) Proteins 14: 401
    Organizational Affiliation: 

    Hauptman-Woodward Medical Research Institute, 73 High Street, Buffalo, NY 14203, USA. smith@hwi.buffalo.edu



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
INSULINA, C, E, G, I, K21N/AMutation(s): 0 
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
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
INSULINB, D, F, H, J, L30N/AMutation(s): 0 
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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.247α = 90
b = 61.739β = 111.32
c = 47.467γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-12-04
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance