Abstract / Description of output
An oxidatively coupled trimer of tyrosine has been isolated from hydrolysates of primary cell walls of a tomato cell culture. UV-absorption, fluorescence and H-1 NMR spectra showed that the trimer was pulcherosine, composed of isodityrosine and tyrosine oxidatively coupled via a biphenyl linkage such that the aromatic core is 2,2'-dihydroxy-3-phenoxybiphenyl. Pulcherosine could act as an intermediate in the conversion of isodityrosine to the tetramer, di-isodityrosine. Steric considerations show that the three tyrosine units of pulcherosine could not be near-neighbour residues within a single polypeptide chain. Pulcherosine therefore forms inter-polypeptide cross-links and/or wide intra-polypeptide loops. (C) 1997 Elsevier Science Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 349-353 |
Number of pages | 5 |
Journal | Phytochemistry |
Volume | 47 |
Issue number | 3 |
Publication status | Published - Feb 1998 |