Biotechnology Bulletin ›› 2022, Vol. 38 ›› Issue (1): 205-214.doi: 10.13560/j.cnki.biotech.bull.1985.2021-0137

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Effects of Sequence Variation on the Biogenesis and Target Relationship of miR-378

ZHANG Ting-huan(), GUO Zong-yi, CHAI Jie, PAN Hong-mei, ZHANG Liang, CHEN Lei, LONG Xi()   

  1. 1. Chongqing Academy of Animal Science,Chongqing 402460
    2. Research Institute of Neijiang Pig,Neijiang 641000
    3. Key Laboratory of Pig Industry Sciences of Ministry of Agriculture and Rural Affairs,Chongqing 402460
  • Received:2021-02-02 Online:2022-01-26 Published:2022-02-22
  • Contact: LONG Xi E-mail:ztinghuan@163.com;13618288075@163.com

Abstract:

The aim of this study is to explore the effects of sequence variation on the structure,expression level and targets relationship of miR-378. PCR-sequencing was employed to align the sequence mutations of miR-378 in different pig breeds and to predict the changes of the secondary structure and free energy of miR-378 caused by the mutation. The miR-378 expression vectors was constructed to detect the effect of mutation on the expression level during the processing. TargetScan and TargetRank were used to analyze the change of target relationship caused by the mutation of miR-378. MicroRNA pull-down technique was adapted to verify the effect of mutation on the target relationship of miR-378. The results showed that there were two A>G mutations on the +49 and +68 position of pre-miR-378 in Rongchang and Neijiang pigs,and the secondary structure and free energy of pre-miR-378 were changed. And these two mutations affected the processing from pri-miR-378 to pre-miR-378,and enhanced the expressions of pre-miR-378 and mature miR-378. The mutation of +49/A>G changed the function and target relationship of miR-378,of which GDF6 and RAB10 were the target genes obtained and deleted after mutation,respectively,while the shared targets(Runx1t1 and Galnt3)were not affected by mutation. These results serve to highlight the importance of miRNA mutations and their impacts on miRNA biogenesis.

Key words: miR-378, sequence variation, biogenesis, targets