Journal of Tianjin Agricultural University ›› 2024, Vol. 31 ›› Issue (3): 17-22.doi: 10.19640/j.cnki.jtau.2024.03.004

• Researches and Scientific Notes • Previous Articles     Next Articles

Codon bias and evolution analysis of maize AAP gene

Wang Yu, Luo Xifan, Ge Junzhu, Chen Shuaijun, Yang Hongpeng, Wu JiangCorresponding Author   

  1. College of Agronomy and Resources Environment, Tianjin Agricultural University, Tianjin 300392, China
  • Received:2023-08-09 Online:2024-06-30 Published:2024-07-15

Abstract: Amino acid permease (AAP) is involved in the absorption and transport of amino acids in plants, thereby altering plant growth and development. The study of codon preference of AAP gene is of guiding significance for heterologous expression of AAP gene, functional verification and improvement of its genetic transformation system. Codon W, EMBOSS, Origin 2021 and SPSS were used to perform clustering, neutral, ENC and PR2-plot of AAP gene codons of 25 species, and the best heteroexpression receptor and genetic transformation receptor of maize AAP were selected. The results showed that CAI, ENc and GC values of maize AAP gene were 0.269, 35.48 and 65.3%, respectively, indicating that the codon preference of maize AAP gene was weak, and the protein encoding process preferred to end in G/C. RSCU clustering analysis showed that maize AAP gene was similar to monocotyledonous grasses in terms of use preference and homologous relationship. The analysis of neutral, ENC and PR2 plots showed that the codon preference of maize AAP was greatly affected by natural selection. The codon frequency analysis showed that Escherichia coli was more suitable as heterologous expression receptor of maize AAP gene than yeast expression system, and rice was more suitable as genetic transformation receptor. This study provides a basis for the functional verification of maize AAP and the cultivation of transgenic plants.

Key words: maize, AAP gene, codon bias, cluster analysis, heterologous expression

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