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Molecular characterization of the porcine MTPAP gene associated with meat quality traits: chromosome localization, expression distribution, and transcriptional regulation

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Abstract

MTPAP (mitochondrial poly(A) polymerase) gene plays a role in stabilizing the level of mitochondrial mRNAs and controlling the poly(A) length of human mitochondrial mRNAs. In this study, 2,296 bp partial cDNA sequences of the porcine MTPAP gene were obtained, which contained 1,746 bp full-length coding regions flanked by a 500 bp partial 3′-UTR. The porcine MTPAP gene was assigned to SSC10q14-q16 using the radiation hybrid (IMpRH) panel and chromosome electric location methods. Q-PCR analysis showed that MTPAP was expressed in all analyzed tissues, and has higher expression in heart, liver, skeletal muscles, and fat. One single nucleotide polymorphism g.2421T>A in intron5 of MTPAP gene was identified and detected by DdeI PCR–RFLP. Association of the genotypes with economic traits showed that different genotypes were significantly associated with juiciness, individuals with genotype AT displayed a significantly higher juiciness compared to genotype TT. The C/EBPβ transcription factors was up-regulation the expression of MTPAP by analyzing a series of MTPAP promoter reporter constructs using the dual-luciferase assay system, it indicated that MTPAP gene maybe play a critical role in fat deposition regulation which is regulated by C/EBPβ transcription factor. These findings provide an important basis for further understanding of porcine MTPAP regulation and function in swine.

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Acknowledgments

The authors would like to thank the numbers of Dr Rothschild’s Lab for their assistance on this research and Dr. Martine Yerle for providing the RH panel (INRA, Castanet-Tolosan, France). The study was supported by the National Transgenic Key Program (2009ZX08012-015B) and Scientific Innovation of University Students Foundation (SRF, A08041).

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Authors and Affiliations

  1. Key Laboratory of Agricultural Animal Genetics, Breeding, and Reproduction of Ministry of Education & Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture, Huazhong Agricultural University, Wuhan, People’s Republic of China

    Xuelei Han, Tengfei Jiang, Lei Yu, Cuiping Zeng, Bin Fan & Bang Liu

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  1. Xuelei Han
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  2. Tengfei Jiang
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  3. Lei Yu
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  4. Cuiping Zeng
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  5. Bin Fan
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  6. Bang Liu
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Correspondence to Bang Liu.

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Xuelei Han and Tengfei Jiang contributed equally to this study.

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Han, X., Jiang, T., Yu, L. et al. Molecular characterization of the porcine MTPAP gene associated with meat quality traits: chromosome localization, expression distribution, and transcriptional regulation. Mol Cell Biochem 364, 173–180 (2012). https://doi.org/10.1007/s11010-011-1216-4

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  • DOI: https://doi.org/10.1007/s11010-011-1216-4

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