IDENTIFICATION OF PLAKOGLOBIN IN OOCYTES AND EARLY EMBRYOS OF XENOPUS-LAEVIS - MATERNAL EXPRESSION OF A GENE ENCODING A JUNCTIONAL PLAQUE PROTEIN

被引:36
作者
FOUQUET, B [1 ]
ZIMBELMANN, R [1 ]
FRANKE, WW [1 ]
机构
[1] GERMAN CANC RES CTR, DIV CELL BIOL, NEUENHEIMER FELD 280, W-6900 HEIDELBERG, GERMANY
关键词
XENOPUS; EMBRYOGENESIS (AMPHIBIAN); OOCYTE; JUNCTIONS; DESMOSOMES; PLAKOGLOBIN;
D O I
10.1111/j.1432-0436.1992.tb00695.x
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
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 beta-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 beta-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.
引用
收藏
页码:187 / 194
页数:8
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