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XB-ART-26615
Proc Natl Acad Sci U S A 1989 Aug 01;8615:5805-9.
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Xenopus homolog of the mos protooncogene transforms mammalian fibroblasts and induces maturation of Xenopus oocytes.

Freeman RS , Pickham KM , Kanki JP , Lee BA , Pena SV , Donoghue DJ .


Abstract
The oncogene v-mos transforms mammalian fibroblasts and encodes a serine/threonine protein kinase. Expression of the c-mos protooncogene is most abundant in germ cells, suggesting a normal role for c-mos in meiosis. Here we describe the isolation of cDNA clones containing the complete coding region of the Xenopus laevis homolog of c-mos (mosxe). The mosxe gene is transforming when introduced into murine NIH 3T3 cells, and transformation is abrogated by a lysine-to-arginine mutation in the canonical ATP-binding site. Microinjection of in vitro transcribed mosxe RNA into prophase-arrested Xenopus oocytes causes a resumption of meiosis, leading to germinal vesicle breakdown and oocyte maturation. Oocyte maturation was not observed after microinjection of in vitro transcribed mosxe RNA encoding the lysine-to-arginine mutation. These results demonstrate that the mosxe-encoded protein can induce progression through the cell cycle for both meiotic and mitotic cells and that this property is dependent on the presumptive ATP-binding domain in the protein kinase.

PubMed ID: 2527365
PMC ID: PMC297719
Article link: Proc Natl Acad Sci U S A
Grant support: [+]

Species referenced: Xenopus laevis
Genes referenced: mos

References [+] :
Allende, Oncogenic ras protein induces meiotic maturation of amphibian oocytes in the presence of protein synthesis inhibitors. 1988, Pubmed, Xenbase