Identification of plakoglobin in oocytes and early embryos of Xenopus laevis: maternal expression of a gene encoding a junctional plaque protein

We have isolated a cDNA encoding the junctional plaque protein plakoglobin of Xenopus laevis and determined its amino acid sequence. Comparisons with sequences of related proteins of the same and other species revealed that in Xenopus plakoglobin and β-catenin are two different proteins, encoded by...

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Veröffentlicht in:Differentiation (London) 1992-11, Vol.51 (3), p.187-194
Hauptverfasser: Fouquet, Bernadette, Zimbelmann, Ralf, Franke, Werner W.
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creator Fouquet, Bernadette
Zimbelmann, Ralf
Franke, Werner W.
description We have isolated a cDNA encoding the junctional plaque protein plakoglobin of Xenopus laevis and determined its amino acid sequence. Comparisons with sequences of related proteins of the same and other species revealed that in Xenopus plakoglobin and β-catenin are two different proteins, encoded by separate genes, that both genes are expressed in embryogenesis, and that the amphibian plakoglobin is more closely related to the human plakoglobin than to β-catenin of the same species. Using this cDNA as a probe, we also show that plakoglobin mRNA is produced and stored in Xenopus oocytes and eggs. We discuss the possibility that the maternal pool of this junctional protein contributes to the junctional structures connecting the oocyte with the follicle epithelium and to the rapid formation of desmosomes and other plaque-bearing junctions in pregastrulation embryogenesis.
doi_str_mv 10.1111/j.1432-0436.1992.tb00695.x
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Comparisons with sequences of related proteins of the same and other species revealed that in Xenopus plakoglobin and β-catenin are two different proteins, encoded by separate genes, that both genes are expressed in embryogenesis, and that the amphibian plakoglobin is more closely related to the human plakoglobin than to β-catenin of the same species. Using this cDNA as a probe, we also show that plakoglobin mRNA is produced and stored in Xenopus oocytes and eggs. 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Comparisons with sequences of related proteins of the same and other species revealed that in Xenopus plakoglobin and β-catenin are two different proteins, encoded by separate genes, that both genes are expressed in embryogenesis, and that the amphibian plakoglobin is more closely related to the human plakoglobin than to β-catenin of the same species. Using this cDNA as a probe, we also show that plakoglobin mRNA is produced and stored in Xenopus oocytes and eggs. 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subjects Amino Acid Sequence
Animals
Base Sequence
Biological and medical sciences
Cell Adhesion Molecules - chemistry
Cell Adhesion Molecules - genetics
Cytoskeletal Proteins - chemistry
Cytoskeletal Proteins - genetics
Desmoplakins
Desmosomes
Embryo, Nonmammalian - metabolism
Embryogenesis (amphibian)
Embryology: invertebrates and vertebrates. Teratology
Fundamental and applied biological sciences. Psychology
gamma Catenin
Gene Expression
Humans
Junctions
Mice
Molecular embryology
Molecular Sequence Data
Oocyte
Oocytes - metabolism
Plakoglobin
Xenopus
Xenopus laevis
Xenopus laevis - embryology
title Identification of plakoglobin in oocytes and early embryos of Xenopus laevis: maternal expression of a gene encoding a junctional plaque protein
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