China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (4): 1170-1178.doi: 10.16431/j.cnki.1671-7236.2021.04.003

• Biotechnology • Previous Articles     Next Articles

Bioinformatics Analysis and Eukaryotic Expression of Chlorocebus sabaeus Glucose Regulatory Protein 78

JIAO Wenqiang1,2,3, LIU Yunchao2, XING Guangxu2, CHEN Pengju4, XU Yindi1,3, WANG Zhifang1,3, ZHANG Qingxian1,3, XU Feng1,3   

  1. 1. Institute of Animal Husbandry and Veterinary, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;
    2. Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;
    3. Key Laboratory of Livestock Breeding and Nutrition Regulation, Zhengzhou 450002, China;
    4. Henan Institute of Modern Chinese Veterinary Medicine, Zhengzhou 450002, China
  • Received:2020-09-18 Online:2021-04-20 Published:2021-04-16

Abstract: The present study was aimed to explore the physicochemical properties and structural characteristics of chlorocebus sabaeus glucose regulatory protein 78 (GRP78) gene,and to elucidate the molecular chaperone effect and regulatory mechanism of GRP78 gene in porcine epidemic diarrhea virus replication.GRP78 gene was amplified by RT-PCR and inserted into pMD20-T Simple vector for cloning and sequencing,and its amino acids sequence,transmembrane structure,glycosylation site,phosphorylation site,and tertiary structure were predicted and analyzed by bioinformatics methods.The GRP78 gene was inserted into pCDNA 3.1,and transfected into Vero-E6 cells.Western blot was employed to confirm the expression of GRP78 in Vero-E6 cells.Bioinformatics analysis results showed that the total length of GRP78 gene was 1 965 bp,encoding 654 amino acids.The molecular weight of GRP78 protein was 72.33 ku.The theoretical isoeletric point was 5.07,and the molecular formula was C3189H5153N865O1019S13.The homology of amino acid sequence of GRP78 gene in Chlorocebus sabaeus with Camelus bactrianus, Canis lupus, Felis catus, Gorilla, Myotis lucifugus, Papio anubis, Sus scrofa, Equus caballus were 99.5% to 99.8%.Genetic analysis showed that gorillas and baboons were the closest relatives.The prediction results of transmembrane region and signal peptide showed that the protein had signal peptide but no transmembrane region.The protein had 6 O-glycosylation sites and 28 phosphorylation sites but no N-glycosylation modification sites,which suggested that GRP78 might have binding sites for PKC and PKA specific protein kinases related to kinase phosphorylation,and might be involved in hexose metabolism and monosaccharide metabolism.

Key words: GRP78 gene; bioinformatics analysis; eukaryotic expression

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