COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Cloning and characterization of the rabbit POU5F1 gene.

The product of the POUSF1 gene, Oct4, plays an important role both in embryonic development and in the self-renewal and differentiation of totipotent cells. To understand the function of Oct4 in rabbit ES cells, we cloned and sequenced the rabbit POU5F1 gene, as well as the cDNA encoded by the gene. The Oct4 cDNA contains a 1083 bp ORF encoding a 360 aa protein and a 241 bp 3' UTR sequence. Oct4 mRNA was expressed at a high level in rabbit ES cells and was barely detectable in the adult spleen, kidney, brain and muscle tissues. The POU5F1 gene is approximately 6 kb in length and includes five exons and four introns. Gene organization is similar to that of the mouse, human and bovine orthologs. Sequencing of the gene revealed an 82% (mouse), 90% (human) and 89% (bovine) overall identity at the protein level. The rabbit POUSF1 gene was mapped to chromosome 12q1.1 by PCR amplification of DNA from two putative POU5F1-containing BAC clones, which were previously mapped to chromosome 12q1.1. The cloning of the rabbit POU5F1 gene will facilitate studies on its roles in rabbit embryogenesis and ES cells.

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