Molecular Characterization of Porcine DNA Methyltransferase Ⅰ

서지정보

ㆍ발행기관 : 한국동물번식학회 ㆍ수록지정보 : Reproductive & developmental biology / 34권 / 4호
ㆍ저자명 : Yu-Youn Lee, Hye-Young Kang, Kwan-Sik Min

목차

ABSTRACT INTRODUCTION MATERIALS AND METHODS Cloning of Porcine Dnmt1 cDNA 5'- and 3'-RACE System In Vivo Derived Porcine Embryos RT-PCR of Tissues and Embryos Real Time PCR RESULTS Cloning of Procine Dnmt1 cDNA Dnmt1 mRNA Expression in Preimplantation PorcineEmbryos and Tissues DISCUSSION REFERENCES

영어 초록

During normal early embryonic development in mammals, the global pattern of genomic DNA methylation undergoes marked changes. The level of methylation is high in male and female gametes. Thus, we cloned the cDNA of the porcine DNA methyltransferase 1 (Dnmt1) gene to promote the efficiency of the generation of porcine clones. In this study, porcine Dnmt1 cDNA was sequenced, and Dnmt1 mRNA expression was detected by reverse transcription-polymerase reaction (RT-PCR) in porcine tissues during embryonic development. The porcine Dnmt1 cDNA sequence showed more homology with that of bovine than human, mouse, and rat. The complete sequence of porcine Dnmt1 cDNA was 4,774-bp long and consisted of an open reading frame encoding a protein of 1611 amino acids. The amino acid sequence of porcine DNMT1 showed significant homology with those of bovine (91%), human (88%), rat (76%), and mouse (75%) Dnmt1. The expression of porcine Dnmt1 mRNA was detected during porcine embryogenesis. The mRNA was detected at stages of porcine preimplantation development (1-cell, 2-cell, 4-cell, 8-cell, morula, and blastocyst stages). It was also abundantly expressed in tissues (lung, ovary, kidney and somatic cells). Further investigations are necessary to understand the complex links between methyltransferase 1 and the transcriptional activity in cloned porcine tissues.

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