Abstract
Kinesins are molecular motors associated with microtubules. They act mainly as intracellular transport proteins carrying different cargos like organelles along the microtubules. We cloned the avian homologue of the mammalian kif5c gene, a member of the khc family coding for the heavy chain of conventional kinesin. Its murine homologue has been described to be specific for neuronal tissue. Here we present the expression pattern of kif5c in chick embryos. We found a highly dynamic expression pattern for kif5c in a variety of developing tissues including neuronal and mesodermal tissues. In young embryos the expression pattern around Hensen’s node is asymmetric with stronger expression on the right side, implying that kif5c is involved in the formation of the left–right body axis. A connection with intracellular transport linked to early asymmetric morphogenesis in the node is likely. Vesicles containing signaling molecules could be possible cargos. At later stages, kif5c expression is found in the paraxial, intermediate and somatic mesoderm and in the tail bud. The expression in the paraxial mesoderm occurs first during segmentation and continues in the epithelial somites and the dermomyotome. During neurulation kif5c is expressed in ectodermal and neural-plate cells. In older embryos, the expression is restricted to the dorsal root and cranial ganglia, neural tube and olfactory tract. Taken together, our results demonstrate that in the chick embryo, kif5c plays a role during different morphogenetic processes.
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Acknowledgements
The authors want to thank Meike Ast-Dumbach, Ulrike Pein, Lydia Koschny, Ellen Gimbel, Günter Frank, Sybille Antoni and Susanna Konradi for their excellent technical assistance. We furthermore wish to thank Bodo Christ for helpful comments in the manuscript. This work was supported by the Deutsche Forschungsgemeinschaft (SFB 592/B4 and Br 957/5-3).
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Dathe, V., Pröls, F. & Brand-Saberi, B. Expression of kinesin kif5c during chick development. Anat Embryol 207, 475–480 (2004). https://doi.org/10.1007/s00429-003-0370-1
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DOI: https://doi.org/10.1007/s00429-003-0370-1