China Animal Husbandry and Veterinary Medicine ›› 2023, Vol. 50 ›› Issue (4): 1307-1318.doi: 10.16431/j.cnki.1671-7236.2023.04.003

• Biotechnology • Previous Articles     Next Articles

Cloning and Bioinformatics Analysis of AANAT Gene in Mink

FAN Bingfeng, LI Wen, LIU Lixiang, ZHAO Xiangyuan, SHAO Jing, LIN Lefeng, SUN Huimin, ZHANG Xulin, XU Baozeng   

  1. Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China
  • Published:2023-04-06

Abstract: 【Objective】 The purpose of this experiment was to clone and bioinformatically analyze the gene of the rate-limiting enzyme aralkylamine-N-acetyltransferase (AANAT) for N-acetyl-5-methoxytryptamine (MT) synthesis in American mink (Neovison vison),so as to provide a reference for biological functions in mink.【Method】 DNA was extracted from the caudal vein of mink,the sequence of AANAT gene was cloned by homologous recombination,the sequence of CDS region was analyzed,the amino acid sequence of AANAT gene was deduced for similarity alignment and phylogenetic tree construction,and the AANAT protein was analyzed by bioinformatics.【Result】 The sequence of AANAT gene in mink was about 1 631 bp,and the sequence of CDS region was 504 bp,which could encode 167 amino acids.The amino acid sequence similarity of AANAT gene in mink was 98.2% with Mustela putorius furo,and the phylogenetic tree analysis also showed that it was the closest relative to Mustela putorius furo.Bioinformatics analysis results showed that AANAT protein in mink was a hydrophobic protein without transmembrane domain and signal peptide,mainly distributed in the cytoplasm,and had 5 antigen-binding sites as a non-secreted protein.AANAT protein contained multiple post-translational modification sites,such as phosphorylation and glycosylation.AANAT protein contained a conserved domain of the N-acyltransferase superfamily,which was closely related to mammalian circadian rhythms.The secondary structure of AANAT protein was dominated by random coil,and the tertiary structure contained several conserved catalytic residues.Protein network interaction analysis results showed that AANAT protein could interact with multipleserotonin synthesis-related proteins.【Conclusion】 The sequence of AANAT gene in mink was successfully obtained.The structure and specific modification sites of AANAT protein might participate in the regulation of MT biosynthesis by localizing acetyl-CoA and 5-hydroxytryptamine.The reults provided a reference for research on the regulation mechanism of AANAT gene on embryonic diapause and improving fecundity in mink.

Key words: mink; AANAT gene; cloning; bioinformatics analysis; protein structure

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