beta-Crustacyanin, the blue-purple carotenoprotein of lobster carapace: consideration of the bathochromic shift of the protein-bound astaxanthin.

  title={beta-Crustacyanin, the blue-purple carotenoprotein of lobster carapace: consideration of the bathochromic shift of the protein-bound astaxanthin.},
  author={P. F. Zagalsky},
  journal={Acta crystallographica. Section D, Biological crystallography},
  volume={59 Pt 8},
  • P. F. Zagalsky
  • Published 2003
  • Chemistry, Medicine
  • Acta crystallographica. Section D, Biological crystallography
The crystal structure of a beta-crustacyanin allows an analysis of the various proposals for the mechanism of the bathochromic shift from orange to purple-blue of astaxanthin in this lobster carotenoprotein. Structural and previous chemical and biophysical studies suggest that extension of conjugation by coplanarization of the beta-ionone rings with the polyene chain and polarization resulting from hydrogen bonding at the C(4) and C(4') keto groups may be mainly responsible for the bathochromic… Expand
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