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Molecular Cloning and Functional Characterization of Tibetan Porcine STING
Key Laboratory for Animal Disease-Resistance Nutrition of Sichuan Province, Institute of Animal Nutrition, Sichuan Agricultural University, Yaan, Sichuan 625014, China
* Author to whom correspondence should be addressed.
Received: 30 November 2011; in revised form: 22 December 2011 / Accepted: 22 December 2011 / Published: 4 January 2012
Abstract: Tibetan pig is well known for its strong disease resistance. However, little is known about the molecular basis of its strong resistance to disease. Stimulator of interferon (IFN) genes (STING), also known as MPYS/MITA/ERIS/TMEM173, is an adaptor that functions downstream of RIG-I and MAVS and upstream of TBK1 and plays a critical role in type I IFN induction. Here we report the first cloning and characterization of STING gene from Tibetan pig. The entire open reading frame (ORF) of the Tibetan porcine STING is 1137 bp, with a higher degree of sequence similarity with Landrace pig (98%) and cattle (88%) than with chimpanzee (84%), human (83%) or mouse (77%). The predicted protein is composed of 378 amino acids and has 4 putative transmembrane domains. Real-time quantitative PCR analysis indicated that Tibetan pig STING mRNA was most abundant in the lung and heart. Overexpression of Tibetan porcine STING led to upregulation of IFN-β and IFN-stimulated gene 15 (ISG15) in porcine jejunal epithelial cell line IPEC-J2 cells. This is the first study investigating the biological role of STING in intestinal epithelial cells, which lays a foundation for the further study of STING in intestinal innate immunity.
Keywords: cloning; innate immunity; IPEC-J2 cells; Tibetan porcine STING; type I interferon
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MDPI and ACS Style
Huang, Z.; Chen, X.; Zhang, K.; Yu, B.; Mao, X.; Zhao, Y.; Chen, D. Molecular Cloning and Functional Characterization of Tibetan Porcine STING. Int. J. Mol. Sci. 2012, 13, 506-515.
Huang Z, Chen X, Zhang K, Yu B, Mao X, Zhao Y, Chen D. Molecular Cloning and Functional Characterization of Tibetan Porcine STING. International Journal of Molecular Sciences. 2012; 13(1):506-515.
Huang, Zhiqing; Chen, Xiaoling; Zhang, Keying; Yu, Bing; Mao, Xiangbing; Zhao, Ye; Chen, Daiwen. 2012. "Molecular Cloning and Functional Characterization of Tibetan Porcine STING." Int. J. Mol. Sci. 13, no. 1: 506-515.