›› 2014, Vol. 41 ›› Issue (12): 7-15.

• 生物技术 • 上一篇    下一篇

京海黄鸡促性腺激素释放激素受体基因密码子特性分析

张涛1,2, 王文浩1,2, 张跟喜1,2, 王金玉1,2, 樊庆灿1,2, 韩昆鹏1,2, 唐莹1,2, 王永娟3   

  1. 1. 扬州大学动物科学与技术学院, 江苏扬州 225009;
    2. 江苏省动物遗传繁育与分子设计重点实验室, 江苏扬州 225009;
    3. 江苏京海集团, 江苏南通 226103
  • 收稿日期:2014-05-04 出版日期:2014-12-20 发布日期:2014-12-25
  • 通讯作者: 王金玉 E-mail:jywang@yzu.edu.cn
  • 作者简介:张涛(1990-),男,山东人,硕士生,研究方向:动物遗传育种与繁殖.
  • 基金资助:
    国家肉鸡产业技术体系(nycytx-42-G1-05);江苏高校优势学科建设工程;江苏省动物遗传繁育与分子设计重点实验室.

Characterization of Codon Usage of GnRHR Gene in Jinghai Yellow Chicken

ZHANG Tao1,2, WANG Wen-hao1,2, ZHANG Gen-xi1,2, WANG Jin-yu1,2, FAN Qing-can1,2, HAN Kun-peng1,2, TANG Ying1,2, WANG Yong-juan3   

  1. 1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China;
    2. Key Laboratory of Animal Genetics, Breeding, Reproduction and Molecular Design of Jiangsu Province, Yangzhou 225009, China;
    3. Jiangsu Jinghai Poultry Group Co., Ltd., Nantong 226103, China
  • Received:2014-05-04 Online:2014-12-20 Published:2014-12-25

摘要: 为了了解鸡促性腺激素释放激素受体(gonadotropin releasing hormone receptor, GnRHR)基因的密码子特性,以便于为GnRHR基因的表达选择合适的外源表达系统,本研究使用在线工具CUSP、CHIPS及CodonW软件对鸡GnRHR基因的密码子特性进行分析,并与鸡、模式动物基因组和其他动物GnRHR基因密码子特性进行比较.结果显示,京海黄鸡GnRHR基因的ENc值较小,具有较强的密码子偏好性,且偏好以G/C结尾的密码子, GnRHR基因CDS序列中,GC含量大于AT含量;CodonW软件计算结果表明,京海黄鸡GnRHR基因密码子中,密码子GCC、ATC、CTC、CTG、CGC、CGG、AGC、TCC和GTG(RSCU>2)偏好性较强,且均以G/C结尾.对31条鸡基因分析表明鸡偏好密码子中有12种G/C结尾的密码子.与大肠杆菌、酵母菌和小鼠基因组密码子使用频率比较显示,京海黄鸡GnRHR基因密码子偏好性与3种生物相差很大,不适合进行外源表达.与其他动物GnRHR基因密码子偏好性比较显示,禽类GnRHR基因偏好含有或以G/C结尾的密码子,而其他物种的GnRHR基因无强烈的偏好性.聚类分析结果表明,亲缘关系近的物种之间倾向于拥有相同的密码子偏好性.

关键词: 京海黄鸡; 促性腺激素释放激素受体基因; 密码子偏好性

Abstract: In order to understand the codon characteristics of GnRHR gene and select the appropriate exogenous expression system, online tools CUSP, CHIPS and CodonW software were used to analyze the codon characteristics of GnRHR gene. GnRHR gene was compared to other genes of chicken, model animal genomes and GnRHR gene of other species.The results showed that ENc value of GnRHR gene in Jinghai Yellow chicken was small, which indicated strong codon bias. GnRHR gene was bias toward the synonymous codons with G and C at the third codon position. GC content was greater than AT content in CDS region of GnRHR gene. Analysis by CodonW software showed that in codons of GnRHR gene in Jinghai Yellow chicken, GCC, ATC, CTC, CTG, CGC, CGG, AGC, TCC and GTG were of strong bias and end with G/C. There were 12 bias codons with G/C at the third codon position in 31 genes of chicken. Codon bias comparison to other species showed that difference between GnRHR gene and the three species were very large, which indicated that GnRHR gene was not suitable for exogenous expression. GnRHR gene of poultry bias toward the synonymous codons contained G/C or end with G/C. GnRHR gene of our species had no strong codon bias. Result of clustering based on RSCU value showed that species with close genetic relationship tend to have similar codon bias.

Key words: Jinghai Yellow chicken; GnRHR gene; codon bias

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