Abstract
abstract AsLn2, an unusual modified peptide, was isolated from the bioluminescent earthworm Fridericia heliota(Enchytraeidae). Its structure, elucidated by NMR and mass spectrometry, includes residues of tyrosine,CompX (a novel tyrosine modification product, reported in the accompanying paper), and N(omega)-acyl-ated lysine. Chromatography, UV, and 1 H NMR data imply a close structural similarity of AsLn2 withF. heliota luciferin. AsLn2 appears to be an intermediate or by-product in F. heliota luciferin biosynthesis. 2013 Elsevier Ltd. All rights reserved. The bioluminescence of earthworms has been insufficientlyinvestigated. Bioluminescent genera are found in three oligochaetafamilies: Megascolecidae, Lumbricidae, and Enchytraeidae. 1 Among them, only the bioluminescence mechanism of Diplocardialonga (Megascolecidae) has been established in terms of the chem-istry of its luciferin.The Siberian luminous earthworm (Fridericia heliota, onlyrecently described) belongs to the Enchytraeidae oligochaetafamily.
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