TY  - JOUR
TI  - HrWnt-5: a maternally expressed ascidian Wnt gene with posterior localization in early embryos.
AU  - Sasakura, Y
AU  - Ogasawara, M
AU  - Makabe, K W
T2  - The International Journal of Developmental Biology
AB  - Ascidians show a highly determinate mode of development. In particular, components of the posterior-vegetal cytoplasm of fertilized eggs are responsible for the establishment of the embryonic axis. Recent studies have, however, also revealed significant roles of cell-cell interactions during embryogenesis. Proteins encoded by the Wnt family of genes act as signals and have been shown to play important roles in a wide range of developmental processes. Here we have isolated and characterized an ascidian Wnt gene, HrWnt-5, from Halocynthia roretzi. HrWnt-5 mRNA is present in the vegetal cortex in unfertilized eggs. After fertilization, HrWnt-5 mRNA moves to the equatorial region to form a crescent-like structure, after which the mRNA is concentrated in the posteriormost region of the embryo. This early pattern of HrWnt-5 mRNA localization coincides with another posterior-vegetally localized mRNA, pem, isolated from Ciona savignyi. In the gastrula, the zygotic HrWnt-5 mRNA is found in a variety of blastomeres, suggesting multiple roles of the gene.
PY  - 1998
VL  - 42
IS  - 4
SP  - 573
EP  - 579
J2  - Int. J. Dev. Biol.
LA  - en
SN  - 0214-6282
SN  - 1696-3547
UR  - https://ijdb.ehu.eus/article/9694628
Y2  - 2024/12/22/10:16:24
ER  -