Expression of a SoxB and a Wnt2/13 gene during the development of the mollusc Patella vulgata.
We cloned and analysed the expression of a SoxB gene ( PvuSoxB) in the marine mollusc, Patella vulgata. Like its orthologues in deuterostomes, after an early broad ectodermal distribution, PvuSoxB expression only persists in cells competent to form neural structures. In the post-gastrulation larva, PvuSoxB is expressed in the prospective neuroectoderm in the head and in the trunk. No expression can be seen dorsally, around the mouth and the anus, or along the ventral midline. We also report the expression of a Wnt2/13 orthologue ( PvuWnt2) in Patella. After gastrulation, PvuWnt2 is expressed in the posterior part of the mouth, along the ventral midline and around the anus. This expression seems to be complementary to that of PvuSoxB in the trunk. We suggest the existence of a fundamental subdivision of the Patella trunk ectoderm into midline (mouth, midline, anus) and more lateral structures.
Le Gouar
Martine
M
Evolution et Développement des protostomiens, Centre de Génétique Moléculaire-UPR 2167 CNRS, 1 av. de la terrasse, 91198, Gif-sur-Yvette, France.
Guillou
Aurélien
A
Vervoort
Michel
M
D000595:Amino Acid Sequence; D000818:Animals; D019521:Body Patterning; D018507:Gene Expression Regulation, Developmental; D018398:Homeodomain Proteins / Q000235:genetics* / Q000378:metabolism; D036341:Intercellular Signaling Peptides and Proteins / Q000235:genetics*; D008969:Molecular Sequence Data; D008974:Mollusca / Q000196:embryology* / Q000235:genetics / Q000378:metabolism; D009420:Nervous System / Q000196:embryology; D010802:Phylogeny; D051153:Wnt Proteins; D051154:Wnt2 Protein
D018398:Homeodomain Proteins; D036341:Intercellular Signaling Peptides and Proteins; D051153:Wnt Proteins; D051154:Wnt2 Protein