PMID: 9427528Jan 14, 1998Paper

Structure of aldolase A (muscle-type) cDNA and its regulated expression in oocytes, embryos and adult tissues of Xenopus laevis

Biochimica Et Biophysica Acta
H HikasaK Shiokawa

Abstract

We obtained cDNA (XALDA; 1466 bp) for Xenopus laevis aldolase A gene (muscle-type), whose amino acid sequence had 88% similarity to those of mammalian aldolase A genes. XALDA mRNA occurred abundantly in skeletal muscle and at low levels also in other adult tissues, and such mRNA distribution was reflected in zymograms. In oocytes XALDA mRNA occurred at a relatively high level from stage I, and the mRNA level peaked at stage II, then decreased in later stages. XALDA mRNA in the full-grown oocyte was inherited as maternal mRNA throughout maturation and fertilization until midblastula stage, but its level became very low during gastrula and early neurula stages, and then increased greatly in later stages. While maternal XALDA mRNA was distributed uniformly in early embryos, mRNA zygotically expressed after late neurula stage occurred mainly in somites. In blastula animal caps XALDA mRNA occurred at a low level, but the expression was greatly enhanced by activin treatment. Thus, in Xenopus laevis aldolase A gene is actively transcribed in earlier phase of oogenesis, inherited as maternal mRNA in early embryos in a cell-type nonspecific way, then in later phases of embryogenesis, it is strongly expressed in somites with its concomit...Continue Reading

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