Binding of trichodermin to mammalian ribosomes and its inhibition by other 12,13-epoxytrichothecenes.

Autor: Wei, Cha-Mer, Campbell, Iain, McLaughlin, Calvin, Vaughan, Maurice
Zdroj: Molecular & Cellular Biochemistry; Jun1974, Vol. 3 Issue 3, p215-219, 5p
Abstrakt: Trichodermin binds to ribosomes from rabbit reticulocyte polysomes with an apparent K of 9.2 × 10 and with a maximum binding ratio of 0.44 molecules per ribosome. Trichodermin also binds firmly to HeLa cell polysomes under conditions where it is inhibiting protein synthesis. Purified HeLa 60S ribosomal subunits showed only a slight ability to bind trichodermin, and no binding was found with 40S subunits. Seventeen 12,13-epoxytrichothecenes were tested for their ability to interfere with [H] trichodermin binding to reticulocyte ribosomes. All compounds known to inhibit ribosomal functions required for elongation-termination or initiation processes exhibited significant positive interference with the binding of trichodermin. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
Externí odkaz: