克拉米多莫纳斯的叶绿体基因可以容忍将遗传密码压缩到仅51个编码子
Pawel M Mordaka1, Kitty Clouston1, Jing Cui2
1Department of Plant Sciences, University of Cambridge, Cambridge CB2 3EA, United Kingdom.
概括
研究人员成功地压缩了Chlamydomonas reinhardtii хлоропласт中的遗传密码,将其减少到51个编码. 这种重编码策略使得功能性基因表达和菌株活力成为可能,为合成生物学进步铺平了道路.
科学领域:
- 合成生物学 合成生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 基因组规模工程允许对遗传密码进行操纵.
- 之前对大肠杆菌的试验表明了密码子的压缩.
- 需要更小,更简单的系统来进行基因代码的重新编码.
研究的目的:
- 开发和测试一种重编码方案,用于Chlamydomonas reinhardtii chloroplast基因组.
- 通过消除特定的代码来压缩遗传代码.
- 评估子压缩对基因表达和生物体适应性的影响.
主要方法:
- 重新编码205千千克的克拉米多马纳斯 (Chlamydomonas reinhardtii chloroplast) 基因组.
- 消除两个停止编码子和氨酸,甘氨酸,异氨酸,氨酸和氨酸的编码子.
- 在rpoA,ycf1,psaA,psbA和大型操作子等重要基因上测试重编码策略.
- 在实验室条件下评估基因功能和菌株适应性.
- 使用Rubisco大子单元 (rbcL) 基因评估遗传密码退化.
主要成果:
- 一个51个共的遗传密码在质体中成功实现了.
- 重编码的基因,包括基本的和高度表达的基因,都被表达出来,而不会影响记者蛋白或菌株适应性.
- 恢复了Rubisco大子单元的功能序列,证明了代码的退化.
- 对于所有重新编码的基因,获得了可行的同质体线.
结论:
- 开发的编码子压缩方案对Chlamydomonas reinhardtii chloroplast是有效的.
- 这种方法允许在可处理的系统中重新编码基因基因代码.
- 这些发现支持使用压缩遗传密码的合成生物学应用的潜力.
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