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5 thiolhistidine a new amino acid from eggs of octopus vulgaris

, : 5 thiolhistidine a new amino acid from eggs of octopus vulgaris. Comparative Biochemistry & Physiology B 80(4): 843-846

Eggs of O. vulgaris contain a new amino acid, 5-thiohistidine, which was isolated and characterized as the corresponding disulphide. Eggs of Loligo vulgaris contain a related metabolite, identified as 1-methyl-5-thiol-histidine. The same amino acid was also detected in urine of Octopus and Loligo. The biochemical interest of these amino acids is briefly discussed in relation to the structure and biogenesis of adenochrome, an unusual Fe(III) chelting peptide from O. vulgaris.


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