The X-ray structure of phomopsin A, a hexapeptide mycotoxin

Abstract

A crystallographic study of phompsin A, the hexapeptide mycotoxin of Phomopsis leptostromiformis responsible for lupinosis disease in animals, has shown that it is a linear peptide, modified by an ether bridge in place of the hydroxy groups of the N-methyl-3-(3-chloro-4,5-dihydroxyphenyl)-3-hydroxyalanine and 3-hydroxyisoleucine units, and thus containing a 13-membered ring.