1J3F

Crystal Structure of an Artificial Metalloprotein:Cr(III)(3,3'-Me2-salophen)/apo-A71G Myoglobin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Coordinated Design of Cofactor and Active Site Structures in Development of New Protein Catalysts

Ueno, T.Koshiyama, T.Ohashi, M.Kondo, K.Kono, M.Suzuki, A.Yamane, T.Watanabe, Y.

(2005) J.Am.Chem.Soc. 127: 6556-6562

  • DOI: 10.1021/ja045995q
  • Primary Citation of Related Structures:  1V9Q

  • PubMed Abstract: 
  • New methods for the synthesis of artificial metalloenzymes are important for the construction of novel biocatalysts and biomaterials. Recently, we reported new methodology for the synthesis of artificial metalloenzymes by reconstituting apo-myoglobin ...

    New methods for the synthesis of artificial metalloenzymes are important for the construction of novel biocatalysts and biomaterials. Recently, we reported new methodology for the synthesis of artificial metalloenzymes by reconstituting apo-myoglobin with metal complexes (Ohashi, M. et al., Angew Chem., Int. Ed. 2003, 42, 1005-1008). However, it has been difficult to improve their reactivity, since their crystal structures were not available. In this article, we report the crystal structures of M(III)(Schiff base).apo-A71GMbs (M = Cr and Mn). The structures suggest that the position of the metal complex in apo-Mb is regulated by (i) noncovalent interaction between the ligand and surrounding peptides and (ii) the ligation of the metal ion to proximal histidine (His93). In addition, it is proposed that specific interactions of Ile107 with 3- and 3'-substituent groups on the salen ligand control the location of the Schiff base ligand in the active site. On the basis of these results, we have successfully controlled the enantioselectivity in the sulfoxidation of thioanisole by changing the size of substituents at the 3 and 3' positions. This is the first example of an enantioselective enzymatic reaction regulated by the design of metal complex in the protein active site.


    Related Citations: 
    • Crystal Structures of Artificial Metalloproteins: Tight Binding of Fe(III)(Schiff-Base) by Mutation of Ala71 to Gly in Apo-Myoglobin.
      Ueno, T.,Ohashi, M.,Kono, M.,Kondo, K.,Suzuki, A.,Yamane, T.,Watanabe, Y.
      (2004) Inorg.Chem. 43: 2852


    Organizational Affiliation

    Research Center for Materials Science and Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myoglobin
A
154Physeter catodonGene Names: MB
Find proteins for P02185 (Physeter catodon)
Go to Gene View: MB
Go to UniProtKB:  P02185
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
CR
Query on CR

Download SDF File 
Download CCD File 
A
CHROMIUM ION
Cr
BFGKITSFLPAWGI-UHFFFAOYSA-N
 Ligand Interaction
CZM
Query on CZM

Download SDF File 
Download CCD File 
A
'N,N'-BIS-(2-HYDROXY-3-METHYL-BENZYLIDENE)-BENZENE-1,2-DIAMINE'
3,3'-ME2-SALOPHEN
C22 H20 N2 O2
DNVUYVBRNCWGAK-RNIAWFEPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.194 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 32.972α = 90.00
b = 58.787β = 90.00
c = 76.237γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSphasing
SCALEPACKdata scaling
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-05-18
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance