2R35

Crystal structure of RB human arg-insulin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.08 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.243 

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:  
    2R36, 2R35, 2R34

  • 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)  |  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
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  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
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RB
Query on RB

Download Ideal Coordinates CCD File 
F [auth D]RUBIDIUM ION
Rb
NCCSSGKUIKYAJD-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download Ideal Coordinates CCD File 
E [auth B]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.08 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.243 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.522α = 90
b = 80.522β = 90
c = 38.329γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
AUTOMARdata reduction
AMoREphasing

Structure Validation

View Full Validation Report



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