First published online September 2, 2003
Development 130, e2005 (2003)
Copyright © 2003 The Company of Biologists Limited
Left or right: 14-3-3E makes an early move
Left-right (LR) axis establishment during embryogenesis underlies the
asymmetric body plan of adult animals, for example, the siting of the heart on
the left side of the human body. On
p. 4847, Bunney et
al. report that the signalling molecule 14-3-3E is involved very early in LR
patterning in Xenopus laevis. The researchers show that the treatment
of newly fertilised eggs with Fusiococcin-A, a fungal toxin that interacts
with 14-3-3 proteins, randomised on which side of the body the heart, gut and
gall bladder developed in the embryos, as did the blockade of 14-3-3 function
with a phosphopeptide containing a 14-3-3 interaction motif and the
overexpression of 14-3-3E. Their demonstration that 14-3-3E is asymmetrically
localised at the first cell division of fertilised Xenopus eggs
identifies the earliest LR asymmetric molecular localisation in any species to
date.

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Related articles in Development:
- Fusicoccin signaling reveals 14-3-3 protein function as a novel step in left-right patterning during amphibian embryogenesis
- Tom D. Bunney, Albertus H. De Boer, and Michael Levin
Development 2003 130: 4847-4858.
[Abstract]
[Full Text]