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J. Cell Biol.,
Volume 145, Number 4, May 17, 1999 825-836
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Mice Analysis
Department of Cell Biology and Anatomy, University of Tokyo, Graduate School of Medicine, 7-3-1, Hongo, Bunkyo-ku, Tokyo
113-0033 Japan
KIF3A is a classical member of the kinesin
superfamily proteins (KIFs), ubiquitously expressed although predominantly in neural tissues, and which
forms a heterotrimeric KIF3 complex with KIF3B or
KIF3C and an associated protein, KAP3. To elucidate
the function of the kif3A gene in vivo, we made kif3A
knockout mice. kif3A
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embryos displayed severe developmental abnormalities characterized by neural
tube degeneration and mesodermal and caudal dysgenesis and died during the midgestational period at ~10.5
dpc (days post coitum), possibly resulting from cardiovascular insufficiency. Whole mount in situ hybridization of Pax6 revealed a normal pattern while staining
by sonic hedgehog (shh) and Brachyury (T) exhibited abnormal patterns in the anterior-posterior (A-P) direction at both mesencephalic and thoracic levels.
These results suggest that KIF3A might be involved in
mesodermal patterning and in turn neurogenesis.
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