557. 颠覆遗传密码的微生物新发现 episode artwork

EPISODE · Dec 22, 2025 · 16 MIN

557. 颠覆遗传密码的微生物新发现

from 知为谁 · host 知为谁

加州大学伯克利分校的研究人员在一种名为 Methanosarcina acetivorans 的古菌中发现,其基因组中的 UAG 密码子 具有罕见的多重含义。通常情况下,每个遗传密码都对应唯一的指令,但这种微生物能根据 环境条件 和 吡咯赖氨酸 的浓度,将同一指令同时解读为“停止信号”或“氨基酸组装”。这一发现打破了维持六十年之久的 “一个密码子对应一个含义” 的生物学基本原则。科学家认为这种 遗传歧义性 并非缺陷,而是帮助古菌摄取特定营养的一种进化策略。此外,这种让终止密码子产生“漏读”的机制,未来可能为治疗 囊性纤维化 等遗传性疾病提供全新的基因疗法思路。内容来源:https://scitechdaily.com/scientists-have-discovered-an-organism-that-breaks-biologys-golden-rule/

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557. 颠覆遗传密码的微生物新发现

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