北方农业学报 ›› 2022, Vol. 50 ›› Issue (4): 11-17.doi: 10.12190/j.issn.2096-1197.2022.04.02

• 分子生物学 · 生理生化 • 上一篇    下一篇

尖孢镰刀菌全基因组密码子偏好性及特征分析

路景诗1, 赵远征2, 王东1, 李晓杰1, 彭静文2, 张龙梅3, 张晓明1   

  1. 1.内蒙古农业大学,内蒙古 呼和浩特 010018
    2.内蒙古自治区农牧业科学院,内蒙古 呼和浩特 010031
    3.内蒙古自治区农牧业技术推广中心,内蒙古 呼和浩特 010011
  • 收稿日期:2022-06-15 出版日期:2022-08-20 发布日期:2022-09-30
  • 通讯作者: 张晓明
  • 作者简介:张晓明(1980—),男,讲师,博士,主要从事植物与微生物互作的研究工作。
    路景诗(2001—),男,本科生,专业为植物与微生物互作。
  • 基金资助:
    国家自然科学基金专项项目(M2042002);内蒙古科技重大专项(zdzx2018049);内蒙古大学生创新创业训练计划项目(202010129016);内蒙古自治区自然科学基金项目(2021BS03008)

Analysis of genome-wide codon preference and characterization of Fusarium oxysporum

LU Jingshi1, ZHAO Yuanzheng2, WANG Dong1, LI Xiaojie1, PENG Jingwen2, ZHANG Longmei3, ZHANG Xiaoming1   

  1. 1. Inner Mongolia Agricultural University,Hohhot 010018,China
    2. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China
    3. Inner Mongolia Agricultural and Animal Husbandry Technology Extension Center, Hohhot 010011,China
  • Received:2022-06-15 Online:2022-08-20 Published:2022-09-30
  • Contact: ZHANG Xiaoming

摘要:

【目的】探究尖孢镰刀菌(Fusarium oxysporum)全基因组的密码子使用模式,分析影响其密码子组成和编码特性的因素。【方法】以F. oxysporum全基因组数据为试验材料,利用CodonW、R等软件分析密码子偏好性及其影响因素。【结果】共得到18 125条符合分析要求的序列;F. oxysporum的平均GC含量为51.46%,ENC值为24.31~61.00,且共有94.41%的ENC值大于45。亮氨酸和丙氨酸占比较高,分别为8.86%和8.29%;色氨酸和半胱氨酸占比较低,分别仅为1.61%和1.34%。F. oxysporum拥有33个高频密码子、19个最优密码子、密码子主要以G/C结尾;密码子基本参数相关性分析表明,GC1和GC2相关性极显著(P<0.01),GC3与ENC的相关性最强(P<0.01)。【结论】尖孢镰刀菌(Fusarium oxysporum)全基因组密码子偏好性主要受自然选择作用影响,同时GC3与ENC相关性最强;33个高频密码子和19个最优密码子主要以G/C结尾。

关键词: 尖孢镰刀菌, 密码子偏好性, 最优密码子, 有效密码子

Abstract:

【Objective】To explore the codon usage pattern of Fusarium oxysporum genome-wide and to assess the factors influencing the codon composition and coding characteristics.【Methods】Using software CodonW and R to analyze the codon preference and its influencing factors on genome-wide data from F. oxysporum.【Results】A total of 18 125 sequences was obtained. The average GC content of F. oxysporum was 51.46%. The ENC value ranged from 24.31 to 61.00,and 94.41% of the ENC values were more than 45. Leucine and Alanine were the major amino acids,and accounted for 8.86% and 8.29% respectively. While Tryptophan and Cysteine accounted for only 1.61% and 1.34% respectively. F. oxysporum had 33 high-frequency codons and 19 optimal codons,with the majority of the codons ending in G/C. The correlation study of basic codon parameters revealed that the correlation between GC1 and GC2 was extreme significant(P<0.01),while the correlation between GC3 and ENC was the strongest(P<0.01).【Conclusion】Natural selection is the primary factor influencing the codon preference of Fusarium oxysporum. The correlation between GC3 and ENC was the strongest. 33 high-frequency codons and 19 optimal codons primarily ending in G/C.

Key words: Fusarium oxysporum, Codon usage preference, Optimal codon, Effective codon

中图分类号: 

  • Q939.11