1TYM

THE STRUCTURE OF A COMPLEX OF HEXAMERIC INSULIN AND 4'-HYDROXYACETANILIDE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The structure of a complex of hexameric insulin and 4'-hydroxyacetanilide.

Smith, G.D.Ciszak, E.

(1994) Proc.Natl.Acad.Sci.USA 91: 8851-8855

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • X-ray crystallographic studies have been carried out on human insulin crystals grown in the presence of 4'-hydroxyacetanilide (Tylenol) and show that this nontoxic phenolic derivative can induce the T-->R transition, producing a T3R3 hexamer. Two dif ...

    X-ray crystallographic studies have been carried out on human insulin crystals grown in the presence of 4'-hydroxyacetanilide (Tylenol) and show that this nontoxic phenolic derivative can induce the T-->R transition, producing a T3R3 hexamer. Two different crystals, grown under different conditions, are rhombohedral, space group R3, with cell constants a = 81.11, c = 37.97 and a = 80.88, c = 37.60 A. The T3R3 hexamer is symmetric, resulting from the presence of a crystallographic threefold axis, and the asymmetric unit consists of a TR dimer. Data to a resolution of 1.9 A were measured on a crystal from each of the two crystallizations and the structures have been refined to residuals of 0.168 and 0.173. The guest molecule is bound by the R-state monomer through the formation of two hydrogen bonds from the hydroxy group of Tylenol to the carbonyl oxygen and the nitrogen of A6 Cys and A11 Cys, respectively. Due to steric constraints of the phenolic binding site, the acetamide group of Tylenol is rotated approximately 50 degrees out of the plane of the phenyl group and the methyl group is cis; no hydrogen bonds exist between the acetamide group and the hexamer. Although the zinc ion, which is bound to the R-state trimer, has tetrahedral coordination in both structures, the T-state zinc is observed to have octahedral coordination in one structure but tetrahedral coordination in the other. The side chain of A10 Ile in the R-state monomer adopts a high-energy conformation as a result of close contact to a residue in an adjacent dimer and may explain in part the differences between therapeutic preparations of beef insulin, for which A10 is a Val residue, and human insulin.


    Related Citations: 
    • Crystallographic Evidence for Dual Coordination Around Zinc in the T3R3 Human Insulin Hexamer
      Ciszak, E.,Smith, G.D.
      (1994) Biochemistry 33: 1512
    • Structural Stability in the 4-Zinc Human Insulin Hexamer
      Smith, G.D.,Swenson, D.C.,Dodson, E.J.,Dodson, G.G.,Reynolds, C.D.
      (1984) Proc.Natl.Acad.Sci.USA 81: 7093


    Organizational Affiliation

    Medical Foundation of Buffalo, Inc., NY 14203.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INSULIN
A, C
21Homo sapiensMutation(s): 0 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Go to Gene View: INS
Go to UniProtKB:  P01308
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
INSULIN
B, D
30Homo sapiensMutation(s): 0 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Go to Gene View: INS
Go to UniProtKB:  P01308
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
B, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
D
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
TYL
Query on TYL

Download SDF File 
Download CCD File 
C
N-(4-HYDROXYPHENYL)ACETAMIDE (TYLENOL)
C8 H9 N O2
RZVAJINKPMORJF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 80.880α = 90.00
b = 80.880β = 90.00
c = 37.600γ = 120.00
Software Package:
Software NamePurpose
PROFFTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-09-30
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance