2R34

Crystal structure of MN human arg-insulin

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.193 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Metal induced structural changes observed in hexameric insulin

Sreekanth, R., Pattabhi, V., Rajan, S.S.

(2009) Int J Biol Macromol 44: 29-36

  • DOI: 10.1016/j.ijbiomac.2008.09.019
  • Primary Citation of Related Structures:  
    2R34, 2R35, 2R36

  • PubMed Abstract: 

    • The metal ions in insulin hexamer play a crucial role in the T to R conformational transitions. We have determined the crystal structures of 2Mn2+, 1Rb1+ and 4Ni2+ human arg-insulin and compared them with the 2Zn2+ structure. The first two structures exist in the T3R3f state like the native 2Zn2+ arg-insulin, while the 4Ni2+ adopts a T6 conformation ...

    The metal ions in insulin hexamer play a crucial role in the T to R conformational transitions. We have determined the crystal structures of 2Mn2+, 1Rb1+ and 4Ni2+ human arg-insulin and compared them with the 2Zn2+ structure. The first two structures exist in the T3R3f state like the native 2Zn2+ arg-insulin, while the 4Ni2+ adopts a T6 conformation. The metal coordination is found to be tetrahedral in all the structures except that of nickel where a dual octahedral and tetrahedral coordination is found at one site. Rubidium occupies only one of the high affinity metal binding sites. The metal induced structural changes observed, have been explained.

    Related Citations: 
    • Crystallographic evidence for dual coordination around zinc in the T3R3 human insulin hexamer
      Ciszak, E., Smith, G.D.
      (1994) Biochemistry 33: 1512
    Organizational Affiliation: 

    Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Chennai, India.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
InsulinA, C22Homo sapiensMutation(s): 0 
Gene Names: INS
UniProt & NIH Common Fund Data Resources
Find proteins for P01308 (Homo sapiens)
Explore P01308 
Go to UniProtKB:  P01308
PHAROS:  P01308
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01308
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
InsulinB, D30Homo sapiensMutation(s): 0 
Gene Names: INS
UniProt & NIH Common Fund Data Resources
Find proteins for P01308 (Homo sapiens)
Explore P01308 
Go to UniProtKB:  P01308
PHAROS:  P01308
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01308
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN
Download Ideal Coordinates CCD File 
E [auth B],
G [auth D]		MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N		 Ligand Interaction
CL
Query on CL
Download Ideal Coordinates CCD File 
F [auth B],
H [auth D]		CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.193 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.687α = 90
b = 80.687β = 90
c = 37.517γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
AUTOMARdata reduction
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-09-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance