China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (5): 1307-1317.doi: 10.16431/j.cnki.1671-7236.2020.05.003

• Biotechnology • Previous Articles     Next Articles

Bioinformatics Characteristics and Expression Analysis of NIS Protein of Mammary Gland in Mouse

XU Xiao, JING Yiming, WANG Quanqi, XU Limin, LIU Yufen   

  1. College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
  • Online:2020-05-20 Published:2020-05-18

Abstract: In order to explore the structure,function and expression characteristics of Na+/I- symporter (NIS) protein of mammary gland in mouse,NIS gene was amplified from mammary gland in mouse,after sequencing,NIS protein was analyzed by bioinformatics software in this study.The transcription and expression level of NIS gene were detecteded in different stages of mammary gland development by Western blotting,immunohistochemistry and semi-quantitative PCR.The results showed that the CDS sequences of NIS gene was 1 857 bp,and the homology was 80.40% between Homo sapiens and Mus musculus,the conservation was stronger.There were 618 amino acid residues of NIS protein in mouse,with a molecular weight of 65.7 ku,the molecular formula was C2996H4701N749O833S32,the theoretical isoelectric point was 7.44,the half-life was 30 h,the extinction coefficient was 102 510,the unstability coefficient was 29.31,and the fat solubility coefficient was 105.91.It was rich in hydrophobic amino acids, and was stable hydrophobin.The secondary structure of NIS protein contained alpha helix (41.42%),extended chain (18.28%),beta turn (4.05%) and random coil (36.25%),which was consist with the tertiary structural results.Western blotting results showed that the specific hybridization bands appeared in all four periods,with a size of 65.7 ku in line with expected results.The immunohistochemistry results showed that the expression of NIS protein increased gradually from puberty and pregnancy to lactation,reached the peak in lactation,there was a significant difference (P<0.05),and returned to a similar puberty state in degenerative period.The level of NIS mRNA was consistent with NIS protein.This study provided a reference for further exploring the role of NIS protein in mammary gland development and lactation regulation.

Key words: mouse; NIS protein; mammary gland; bioinformatics; expression

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