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Science 5 August 1994:
Vol. 265. no. 5173, pp. 803 - 806
DOI: 10.1126/science.8047887

Articles

Science, Vol 265, Issue 5173, 803-806
Copyright © 1994 by American Association for the Advancement of Science


articles

Induction of mesoderm in Xenopus laevis embryos by translation initiation factor 4E

PS Klein and DA Melton

Department of Biochemistry and Molecular Biology, Harvard University, Cambridge, MA 02138.

The microinjection of messenger RNA encoding the eukaryotic translation initiation factor 4E (eIF-4E) into early embryos of Xenopus laevis leads to the induction of mesoderm in ectodermal explants. This induction occurs without a stimulation of overall protein synthesis and is blocked by the co-expression of a dominant negative mutant of the proto-oncogene ras or a truncated activin type II receptor. Although other translation factors have been studied in vertebrate and invertebrate embryos, none have been shown to play a direct role in development. The results here suggest a mechanism for relaying and amplifying signals for mesoderm induction.


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Transient Expression of a Translation Initiation Factor Is Conservatively Associated with Embryonic Gene Activation in Murine and Bovine Embryos.
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Epidermal induction and inhibition of neural fate by translation initiation factor 4AIII.
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The role in neural patterning of translation initiation factor eIF4AII; induction of neural fold genes.
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Alternatively Spliced Transcripts from the Drosophila eIF4E Gene Produce Two Different Cap-binding Proteins.
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A common function for mRNA 5' and 3' ends in translation initiation in yeast..
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D. Kessler and D. Melton (1994)
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