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• W3216033117 abstract "Abstract Background Intramuscular fat (IMF) is a key meat quality trait. Research on the genetic mechanisms of IMF decomposition is valuable for both pork quality improvement and the treatment of obesity and type 2 diabetes. Copy number variations (CNVs) are a type of variant that may influence meat quality. Results In this study, a total of 1185 CNV regions (CNVRs) including 393 duplicated CNVRs, 432 deleted CNVRs, and 361 CNVRs with both duplicated and deleted status were identified in a pig F2 resource population using next-generation sequencing data. A genome-wide association study (GWAS) was then performed between CNVs and IMF, and a total of 19 CNVRs were found to be significantly associated with IMF. QTL colocation analysis indicated that 3 of the 19 CNVRs overlapped with known QTLs. RNA-seq and qPCR validation results indicated that CNV150, which is located on the 3’UTR end of the proline, glutamate, and leucine rich protein 1 ( PELP1 ) gene, may affect the expression of PE LP1 alternative splices. Sequence alignment and Alphafold2 structure prediction results indicated that the two alternative splices of PELP1 have a 23 AA sequence variation and a helix-fold structure variation. This region is located in the region of interaction between PELP1 and other proteins which have been reported to be significantly associated with fat deposition or insulin resistance. We infer that the CNVR may influence IMF content by regulating the alternative splicing of the PELP1 gene and ultimately affecting the structure of the PELP1 protein. Conclusions In conclusion, we found some CNVRs, especially CNV150, located in PELP1 that affect IMF. These findings suggest a novel mechanistic approach for meat quality improvement in animals and potential treatment of insulin resistance in human beings." @default.
• W3216033117 created "2021-12-06" @default.
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• W3216033117 date "2021-10-18" @default.
• W3216033117 modified "2023-09-23" @default.
• W3216033117 title "Copy Number Variations Contribute to Intramuscular Fat Content Differences By Affecting The Expression of PELP1 Alternative Splices in Pig" @default.
• W3216033117 doi "https://doi.org/10.21203/rs.3.rs-968559/v1" @default.
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