一颗脆弱恒星中光酶的功能性表征表明,光脱酶在基因组中的可用性影响了平行进化
bioRxiv : the preprint server for biology
|October 28, 2024
概括
生物发光的融合进化可能源于共同的遗传起源,正如在易碎恒星和八角珊瑚中光酸酶 (luciferase) 来自光酸脱基酶所见的那样. 基因组可用性影响了这些特征的基因招募.
科学领域:
- 进化生物学是进化的生物学.
- 生物化学 生物化学
- 基因组学就是基因组学.
背景情况:
- 融合特征可以通过共享或独特的遗传途径进化,影响生物多样性.
- 了解融合特征的遗传基础是进化研究的关键.
- 影响融合特征遗传基础的因素尚未完全理解.
研究的目的:
- 为了研究易碎星*Amphiura filiformis*中生物发光的遗传起源.
- 探索醇脱基酶的进化历史和基因组分布.
- 确定在融合进化中使用共享与不同的遗传组件的因素.
主要方法:
- 不同类型的蛋白质表达.
- 生物化学测定 生物化学测定
- 人类遗传学分析
- 数据库搜索数据库搜索
- 基因树分析基因树分析
主要成果:
- 证实了 luciferase 的起源来自 * Amphiura filiformis * 中的 haloalkane dehalogenases.
- 揭示了一种复杂的存在和缺席模式, Haloalkane dehalogenases 跨越基因组.
- 在八角珊瑚 (*Renilla*) 中证明了醇甲基脱基酶衍生的光酶的并行进化,尽管其他生物发光生物使用了不同的光酶.
- 建议基因家族的基因组分布会影响它们对生物发光等新功能的招募.
结论:
- 生物化学功能和基因组可用性是特征融合进化的关键决定因素.
- 这项研究提供了关于共享遗传组件如何在多种不同的种类中支融合进化的见解.
- 这些发现突出了基因进化和功能适应在产生生物多样性的相互作用.
相关概念视频
01:28Gene Regulation in Microbial Communities: Quorum Sensing
3
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
3
01:28Multiple Halogenation of Methyl Ketones: Haloform Reaction
2.0K
A method involving the transformation of methyl ketones to carboxylic acids using excess base and halogen is called the haloform reaction. It begins with the deprotonation of α hydrogen to form an enolate ion which reacts with the electrophilic halogen to give an α-halo ketone. The step continues until all the α protons are substituted to form a trihalomethyl ketone. The resulting molecule is unstable, and in the presence of a hydroxide base, it readily undergoes nucleophilic...
2.0K
01:21Acid-Catalyzed α-Halogenation of Aldehydes and Ketones
3.6K
By replacing an α-hydrogen with a halogen, acid-catalyzed α-halogenation of aldehydes or ketones yields a monohalogenated product
In the first step of the mechanism, the acid protonates the carbonyl oxygen resulting in a resonance-stabilized cation, which subsequently loses an α-hydrogen to form an enol tautomer. The C=C bond in an enol is highly nucleophilic because of the electron-donating nature of the –OH group. Consequently, the double bond attacks an electrophilic halogen to form a...
In the first step of the mechanism, the acid protonates the carbonyl oxygen resulting in a resonance-stabilized cation, which subsequently loses an α-hydrogen to form an enol tautomer. The C=C bond in an enol is highly nucleophilic because of the electron-donating nature of the –OH group. Consequently, the double bond attacks an electrophilic halogen to form a...
3.6K