›› 2019, Vol. 46 ›› Issue (8): 2397-2405.doi: 10.16431/j.cnki.1671-7236.2019.08.025

• Genetics and Breeding • Previous Articles     Next Articles

Sequence and Expression Analysis of OPN Gene in Tibia of Layer During Late Period of Laying

CHEN Ye1, HOU Jianku2, HOU Fei2, LI Xianglong3, XU Lijun4, WANG Han1, CHEN Hui1, ZHOU Rongyan1   

  1. 1. College of Animal Science and Technology, Hebei Agricultural University, Baoding 071000, China;
    2. Shunping County Agricultural Bureau, Shunping 072250, China;
    3. Hebei Normal University of Science & Technology, Changli 066600, China;
    4. Baoding Animal Husbandry Station, Baoding 071000, China
  • Received:2019-01-07 Online:2019-08-20 Published:2019-08-17

Abstract:

To investigate the structure and function of osteopontin (OPN) gene and explore its expression characteristics in bone metabolism of layer during late period of laying.The tibia of Hyline Grey layer at late period of laying was selected for RNA isolation.The specific primers were designed based on OPN gene sequence of Gallus gallus in GenBank (accession No.:NC_006091.5) using Primer Premier 3.0 online software.The coding sequence (CDS) of OPN gene was cloned by RT-PCR and analyzed by bioinformatics.Real-time PCR technology was used to detect the expression of OPN gene mRNA in tibia.The results showed that the full-length of chicken OPN gene CDS was 795 bp, encoding 264 amino acids.The phylogenetic tree constructed by Mega 6.0 software showed that the relationship was the closest between chicken and carp, with 100% similarity.The OPN gene was highly conserved in avian evolution.The bioinformatics analysis suggested that OPN was an unstable and hydrophilic protein with 27 O-glycosylation sites, 1 N-glycosylation site and 34 phosphorylation sites.The subcellular localization of OPN was mainly localized in cytoplasm (44.4%) and mitochondria (33.3%).The secondary structure was mainly composed of random coil and alpha helix.The difference of OPN gene mRNA expression among individuals was not related to bone strength.The results indicated that OPN gene mRNA expression was not related to the bone strength, which provided a reference basis for further study on the mechanism of OPN gene in bone metabolism of layer during late period of laying.

Key words: layer; tibia; OPN gene; late period of laying

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