Asian-Australasian Journal of Animal Sciences

  • 제20권11호
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  • Pages.1655-1661
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  • 2007
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  • 1011-2367(pISSN)
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  • 1976-5517(eISSN)
아세아태평양축산학회 (Asian Australasian Association of Animal Production Societies)
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Cloning and Expression Analysis of the ${\alpha}$-Subunit of Porcine Prolyl 4-hydroxylase

  • Cho, Eun Seok (Department of Animal Resources Technology, Jinju National University) ;
  • Jung, Won Youg (Department of Animal Resources Technology, Jinju National University) ;
  • Kwon, Eun Jung (Department of Animal Resources Technology, Jinju National University) ;
  • Park, Da Hye (Department of Animal Resources Technology, Jinju National University) ;
  • Chung, Ki Hwa (Department of Animal Resources Technology, Jinju National University) ;
  • Cho, Kwang Keun (Department of Animal Resources Technology, Jinju National University) ;
  • Kim, Chul Wook (Department of Animal Resources Technology, Jinju National University)
  • 투고 : 2007.03.05
  • 심사 : 2007.06.05
  • 발행 : 2007.11.01
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초록

Prolyl 4-hydroxylase (P4H) plays a central role in collagen synthesis by catalyzing the hydroxylation of the proline residue in the X-Pro-Gly amino acid sequence, and controls the biosynthesis of collagen that influences overall meat quality. In order to verify expression level of the catalytic ${\alpha}$ subunit of P4H, a 2.7 kb clone of the ${\alpha}$ subunit gene for P4H was selected from a cDNA library prepared from the muscular tissue of Sancheong berkshire pigs, and the whole gene sequence was determined. As expression level of the ${\alpha}$ subunit of P4H differed between tissues of pigs, we intended to assess more precisely the level of ${\alpha}$-subunit expression between tissues of Sancheong Berkshire pigs by using RT-PCR. Muscular and adipose tissues were taken from each pig grouped by growth stage (weighing 60, 80, and 110 kg) of Yorkshire and Sancheong Berkshire pigs, and the expression levels of the ${\alpha}$-subunit of P4H were examined. Since there were significant differences in the expression level with respect to variation in growth stage (p<0.01), an attempt was made to identify any influences of pig species and tissue variation. The muscular and adipose tissues of pigs weighing 110 kg showed higher expression levels than pigs weighing 60 kg and 80 kg. In general, significantly higher expression levels were found in muscular than in adipose tissue. The expression levels in Sancheong Berkshire were significantly higher than in Yorkshire pigs (p<0.01 or p<0.05). Since expression level of the ${\alpha}$-subunit of P4H affects the activity of P4H and is connected to the biosynthesis of collagen and increased collagen can improve meat texture, this finding may explain why meat quality of the Sancheong Berkshire pig is acclaimed in Korea. Given the higher expression levels of the ${\alpha}$-subunit gene in adipose than in muscular tissue, and also in the heavier pigs, more intensive studies are required to assess the correlation between expression level of the ${\alpha}$ subunit gene and overall meat quality.

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참고문헌

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