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Identification of splice variants, expression analysis and single nucleotide polymorphisms of the PRMT2 gene in dairy cattle.

Gene. 2014 Apr 10;539(1):37-43. Epub 2014 Feb 03
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摘要


Protein arginine N-methyltransferase 2 (PRMT2), also named HRMT1L1, belongs to the Bovine Protein arginine N-methyltransferase (PRMT) genes which are involved in the immune response. To explore the variability of the PRMT2 gene and resistance to mastitis in cows, splice variant (SV), and single nucleotide polymorphisms (SNPs) were identified in this study. A SV (PRMT2-SV) lacking exon 7 (98-bp) of the PRMT2 gene was found in healthy and mastitis-infected mammary gland tissues. Two of four SNPs were significantly associated with bovine milk yield and protein content. Further, we estimated the relative expression of PRMT2-SV in the mammary gland tissue of dairy cattle by using quantitative real-time polymerase chain reaction. The result showed that expression of the PRMT2-SV mRNA was significantly upregulated 4.02-fold (p<0.05) in infected mammary tissues (n=5) compared to healthy tissues (n=5). Our findings reveal that PRMT2-SV may play an important role in mastitis resistance in dairy cattle. The SNPs may be used as a possible candidate SNPs for marker-assisted selection and management in Chinese Holstein cattle.

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