Inhibition of translation and modification of translation factors during apoptosis induced by the DNA-damaging agent MMS in sea urchin embryos.
Translational control was investigated in sea urchin eggs and embryos in response to the DNA-damaging agent methyl methanesulfonate (MMS). We have shown in this report that exposure of sea urchin embryos to MMS induces drastic effects on protein synthesis activity, and on translation factors level, integrity and post-translational modifications. In response to the treatment of embryos by the DNA-damaging agent MMS, protein synthesis is inhibited independently of the translation inhibitor 4E-BP and in correlation with phosphorylation of the translation factor eIF2alpha subunit. Furthermore, a low molecular weight form of translation initiation factor eIF4G is detected correlatively with MMS-induced apoptosis. We propose that modifications of translation factors play an important role in protein synthesis modulation that occurs during DNA-damage induced apoptosis.
Le Bouffant
Ronan
R
Equipe Cycle Cellulaire et Développement, CNRS, UMR 7150, Station Biologique de Roscoff, Roscoff Cedex, France.
Boulben
Sandrine
S
Cormier
Patrick
P
Mulner-Lorillon
Odile
O
Bellé
Robert
R
Morales
Julia
J
D000818:Animals; D017209:Apoptosis; D004249:DNA Damage / Q000187:drug effects*; D004625:Embryo, Nonmammalian; D015852:Eukaryotic Initiation Factor-2 / Q000378:metabolism; D039603:Eukaryotic Initiation Factor-4G / Q000032:analysis; D008741:Methyl Methanesulfonate / Q000494:pharmacology; D010063:Ovum; D010766:Phosphorylation; D014176:Protein Biosynthesis / Q000187:drug effects*; D012269:Ribosomal Proteins / Q000187:drug effects / Q000378:metabolism*; D012617:Sea Urchins
D015852:Eukaryotic Initiation Factor-2; D039603:Eukaryotic Initiation Factor-4G; D012269:Ribosomal Proteins; D008741:Methyl Methanesulfonate