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Two bromotyrosine-cysteine derived metabolites from a sponge

✍ Scribed by A.D. Rodriguez; Rhone K. Akee; Paul J. Scheuer

Publisher
Elsevier Science
Year
1987
Tongue
French
Weight
220 KB
Volume
28
Category
Article
ISSN
0040-4039

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✦ Synopsis

The structures of a dimeric and a tetrameric degraded dipeptide. derivable from bromotyrosine and cysteine, have been elucidated. Both compounds inhibit the growth of Bacillus subtiZis and Staphylococcus aLLI-eus. Bromotyrosine-derived secondary metabolites are characteristic of sponges of the order Verongida. 2

The compounds that have been encountered may be simple tyrosine degradation products, as e.g. aerothionin (1) 3 or they may be complex, as e.g. the psammaplysins (_2).4

which may have arisen from condensation of tyrosine with homoserine or its equivalent.

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