title: Differential expression of the Groucho-related genes 4 and 5 during early development of Xenopus laevis.
abstract: Recently, we demonstrated that the Xenopus Wnt effector XTcf-3 interacts with Groucho-related transcriptional repressors (Roose et al., 1998. Nature 395, 608-612). A long form of the Groucho-related genes, XGrg-4, was shown to repress axis formation in the Xenopus embryo, whereas a short form, XGrg-5, acted as a potentiator. In this study, the temporal and spatial expression of XGrg-4 and XGrg-5 is described in Xenopus laevis embryos. Both genes are maternally expressed. In the gastrula, transcripts of both genes are present in the animal as well as the vegetal region. At later stages, XGrg-4 and XGrg-5 show specific patterns of expression in the central nervous system (CNS), cranial ganglia, eyes, otic vesicles, stomodeal-hypophyseal anlage, cement gland, head mesenchyme, branchial arches, neural crest and derivatives, somites, pronephros, pronephric duct, heart and tailbud. Differences in the expression of XGrg-4 and XGrg-5 were found in the CNS, cranial ganglia, olfactory placodes, stomodeal-pharyngeal anlage, cement gland, head mesenchyme and ectoderm.
authors.affiliation: Hubrecht Laboratory, Netherlands Institute for Developmental Biology, Uppsalalaan 8, 3584 CT, Utrecht, The Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: Molenaar
authors.forename: E
authors.initials: E
authors.lastname: Brian
authors.forename: J
authors.initials: J
authors.lastname: Roose
authors.forename: H
authors.initials: H
authors.lastname: Clevers
authors.forename: O
authors.initials: O
authors.lastname: Destrée
mesh_terms: D000818:Animals; D056970:Co-Repressor Proteins; D004268:DNA-Binding Proteins; D018507:Gene Expression Regulation, Developmental; D012097:Repressor Proteins / Q000235:genetics*; D029867:Xenopus Proteins; D014982:Xenopus laevis / Q000196:embryology* / Q000235:genetics
chemical_list: D056970:Co-Repressor Proteins; D004268:DNA-Binding Proteins; D012097:Repressor Proteins; C523700:TLE4 protein, Xenopus; D029867:Xenopus Proteins; C115161:aes protein, Xenopus