Studies on Mammalian Homolog and Flanking Sequence of Mouse MT Transposon-like Element, Clone MTi7(MTi7)

생쥐의 MT Transposon-like Element, Clone MTi7(MTi7) 유전자의 포유류 Homolog 및 Flanking Sequence에 대한 연구

  • 김영훈 (포천중문의과대학교 생명과학전문대학원) ;
  • 고민수 (솔젠트사) ;
  • 우대균 (용인대학교 환경생명학부) ;
  • 최돈찬 (용인대학교 환경생명학부) ;
  • 이경아 (포천중문의과대학교 생명과학전문대학원)
  • Published : 2003.12.01


In the previous study, we obtained list of differentially expressed genes between postnatal day 1 and day 5 mouse ovaries using suppression subtractive hybridization(SSH) and found that MT Oansposon-like element, clone MTi7(MTi7) was one of the highly expressed genes in the day 5 mouse ovary(Park et at., 2002). Results of in situ hybridization and RNA interference revealed that the expression of MTi7 is oocyte-specific in the ovary and may be involved in the regulation of oocyte maturation(Park et at., 2003). At present, MTi7 sequence has been known only in the mouse. Therefore, the present study was accomplished 1) to identify MTi7 sequence in the other mammalian species, such as bovine, porcine, rat, and human, and 2) to evaluate the flanking sequence of the mouse MTi7 since it has transposon characteristics. Using ovarian cDNAs derived from low different species, we cloned and identified new MTi7 sequence showing a high degree of sequence homology with the mouse MTi7(87∼98%). By using inverse PCR, we found that the mouse MTi7 may intercalated the beta-carotene 15, 15'-monooxygenase(Bcdo) gene and/or serine protease inhibitor, Kunitz Dpe I(Spint 1) gene. By finding the MTi7 sequences in the other mammalian species and the flanking gene of the MTi7 in mouse, it is expected to reveal the role(s) of MTi7 in the oogenesis as well as folliculogenesis in the near future.