在Trichoderma reesei超生产者RutC30和自然分离物之间的杂交中产生了跨越性表型
Laetitia Chan Ho Tong1, Etienne Jourdier1, Delphine Naquin2
1Biotechnology Department, IFP Energies nouvelles (IFPEN), 92852 Rueil-Malmaison, France.
Microbiology spectrum
|August 20, 2024
概括
在工业酶生产中至关重要的真菌Trichoderma reesei的繁殖,解锁了新的菌株优化可能性. 性繁殖产生了多样化的后代,具有增强的细胞酶活动,表现优于父系菌株.
科学领域:
- 工业生物技术 工业生物技术
- 菌类遗传学 菌类遗传学
- 酶生产 酶生产
背景情况:
- 体真菌 (Trichoderma reesei) 是工业纤维酶生产的关键细丝真菌,对于体纤维素生物质水解至关重要.
- 这种真菌在历史上被认为是无性,限制了传统的基于繁殖的优化策略.
- 发现交配型位点和成功交叉的发现为菌株改进提供了新的途径.
研究的目的:
- 作为优化Trichoderma reesei菌株以增强细胞酶生产的战略,研究分生.
- 分析过度生产和野生型菌株之间的交叉后代的遗传多样性和表型结果.
- 识别导致过度生产的遗传因素和细胞酶活动中的突破性表型.
主要方法:
- 交叉了超产品菌株RutC30与野生型菌株CBS999.97.97的相容的雌性阿斯科菌衍生隔离物.
- 分析了大约300个后代的分泌蛋白质水平和酶活性.
- 在10个表现最好的生产者菌株上进行了基因组测序.
主要成果:
- 在后代中观察到分泌蛋白质水平的连续分布,表明过度生产的多基因控制.
- 在更高的生产者中发现了对MAT1-2菌株的偏见,尽管与交配类型的点没有直接联系.
- 检测到超越性表型,其中一些后代表现出明显高于父母双方的酶活性.
结论:
- 杂交是一种有效的策略,用于产生遗传多样性和优化Trichoderma reesei菌株.
- 该研究强调了实现具有优越工业酶生产能力的超越性表型的潜力.
- 父母基因对过度生产和生育都起着作用,为未来的菌株发展提供了洞察力.
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