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'Phycoerythrin' in keywords Facet   section ZfN Section C:Volume 034  [X]
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1979 (1)
1Author    Hugo Scheer, Helmut Formanek, W. Olfhart RüdigerRequires cookie*
 Title    The Conformation of Bilin Chromophores in Biliproteins: Ramachandran-Type Calculations  
 Abstract    Ramachandran-type calculations are perform ed for conformations o f bilin chromophores pres­ ent in the biliproteins phycocyanin, phycoerythrin and phytochrome. The atom ic coordinates are taken from x-ray data o f crystalline model compounds, namely biliverdin for pyrrole rings B, C, D and substituted succinimides for the hydrogenated ring A including a thioether containing ^-sub­ stituent. Maxima and m inim a for steric hindrance are calculated for rotation o f the thioether side chain, the rotation of pyrrole rings at single bonds (syn-anti-forms) and at double bonds (Z-E-iso-mers) of the methine bridges. Whereas quasi-planar structures are possible for all syn, Z-forms, only twisted structures are possible if anti, E-forms are considered. The relevance for the bilin con­ formations of native biliproteins and o f the Pr ^ Pfr phototransform ation is discussed. 
  Reference    Z. Naturforsch. 34c, 1085 (1979); received June 29 1979 
  Published    1979 
  Keywords    Bilin Conformation, Phycocyanin, Phycoerythrin, Phytochrome 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-1085.pdf 
 Identifier    ZNC-1979-34c-1085 
 Volume    34