S. Reinbothe et al., JIP60, A METHYL JASMONATE-INDUCED RIBOSOME-INACTIVATING PROTEIN INVOLVED IN PLANT STRESS REACTIONS, Proceedings of the National Academy of Sciences of the United Statesof America, 91(15), 1994, pp. 7012-7016
Plant tissues treated with the naturally occurring cyclopentanone comp
ound methyl jasmonate or exposed to stress causing in planta jasmonate
accumulation express distinctive proteins and, concomitantly, reduce
the synthesis of most preexisting proteins. One of the recently identi
fied jasmonate-induced proteins, designated JIP60, in barley is a ribo
some-inactivating protein that cleaves polysomes of both animal and pl
ant origin into their ribosomal subunits. By attacking foreign and sel
f ribosomes, respectively, JIP60 appears to be both a defense protein
and a potent regulator of protein synthesis in stressed plant tissues.