Asian-Australasian Journal of Animal Sciences

  • 제31권10호
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  • Pages.1581-1590
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  • 2018
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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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Novel splice isoforms of pig myoneurin and their diverse mRNA expression patterns

  • Guo, Xiaohong (College of Animal Science and Veterinary Medicine, Shanxi Agricultural University) ;
  • Li, Meng (College of Animal Science and Veterinary Medicine, Shanxi Agricultural University) ;
  • Gao, Pengfei (College of Animal Science and Veterinary Medicine, Shanxi Agricultural University) ;
  • Cao, Guoqing (College of Animal Science and Veterinary Medicine, Shanxi Agricultural University) ;
  • Cheng, Zhimin (College of Animal Science and Veterinary Medicine, Shanxi Agricultural University) ;
  • Zhang, Wanfeng (College of Animal Science and Veterinary Medicine, Shanxi Agricultural University) ;
  • Liu, Jianfeng (Key Laboratory of Animal Genetics Breeding and Reproduction, Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University) ;
  • Liu, Xiaojun (College of Animal Science and Veterinary Medicine, Henan Agricultural University) ;
  • Li, Bugao (College of Animal Science and Veterinary Medicine, Shanxi Agricultural University)
  • 투고 : 2017.12.17
  • 심사 : 2018.04.23
  • 발행 : 2018.10.01
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초록

Objective: The aim of this study was to clone alternative splicing isoforms of pig myoneurin (MYNN), predict the structure and function of coding protein, and study temporal and spatial expression characteristics of each transcript. Methods: Alternative splice isoforms of MYNN were identified using RNA sequencing (RNA-seq) and cloning techniques. Quantitative real-time polymerase chain reaction (qPCR) was employed to detect expression patterns in 11 tissues of Large White (LW) and Mashen (MS) pigs, and to study developmental expression patterns in cerebellum (CE), stomach (ST), and longissimus dorsi (LD). Results: The results showed that MYNN had two alternatively spliced isoforms, MYNN-1 (GenBank accession number: KY470829) and MYNN-2 (GenBank accession number: KY670835). MYNN-1 coding sequence (CDS) is composed of 1,830 bp encoding 609 AA, whereas MYNN-2 CDS is composed of 1,746 bp encoding 581 AA. MYNN-2 was 84 bp less than MYNN-1 and lacked the sixth exon. MYNN-2 was found to have one $C_2H_2$ type zinc finger protein domain less than MYNN-1. Two variants were ubiquitously expressed in all pig tissues, and there were significant differences in expression of different tissues (p<0.05; p<0.01). The expression of MYNN-1 was significantly higher than that of MYNN-2 in almost tissues (p<0.05; p<0.01), which testified that MYNN-1 is the main variant. The expression of two isoforms decreased gradually with increase of age in ST and CE of MS pig, whereas increased gradually in LW pig. In LD, the expression of two isoforms increased first and then decreased with increase of age in MS pig, and decreased gradually in LW pig. Conclusion: Two transcripts of pig MYNN were successfully cloned and MYNN-1 was main variant. MYNN was highly expressed in ST, CE, and LD, and their expression was regular. We speculated that MYNN plays important roles in digestion/absorption and skeletal muscle growth, whereas the specific mechanisms require further elucidation.

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