植物类生物合成从细菌类脱碳酸酶的并行演化
Catharine X Wood1,2, Zhouqian Jiang1,2, Inesh Amarnath1
1Centre for Novel Agricultural Products, Department of Biology, University of York, York, YO10 5DD, UK.
The New phytologist
|January 14, 2026
概括
研究人员发现了新的酶,奥尼/氨酸/氨酸脱碳氧化酶 (OLADOs),通过非对称的途径产生植物化物. 这些在各种植物物种中发现的酶通过并行进化而出现,扩大了我们对类生物合成的理解.
科学领域:
- 生物化学 生物化学
- 植物科学 植物科学
- 酶学 是一种酶学.
背景情况:
- 基本的氨基酸 lysine 和 ornithine 是重要的植物类化合物的前体.
- 类生物合成可以通过对称或非对称的路径发生.
研究的目的:
- 为了确定负责化物生物合成非对称途径的酶.
- 描述新发现的酶及其进化起源.
主要方法:
- 转录学和酶表征 (变异性,同位素标记) 用于识别关键酶.
- 遗传学分析被用来追踪这些酶在植物谱系的进化历史.
- 进行了酶试验,以确定基质特异性和催化机制.
主要成果:
- 发现了依赖于甲素/氨酸/氨酸脱碳氧化酶 (OLADOs) 的甲素酸盐 (PLP) 酶,可催化非对称的化物前体合成.
- 在 *Flueggea suffruticosa*, *Nicotiana tabacum* 和 *Artemisia annua* 中识别OLADO.
- 证明OLADOs通过植物的并行进化从鸟/氨酸/氨酸脱碳酶类家族 (OLADLs) 进化,代表一种新的真核脱碳酶类.
结论:
- 奥拉多是一种新型的植物酶类,对非对称类生物合成至关重要.
- 奥拉多的发现扩大了已知的植物中化物生产的酶谱.
- 平行进化提供了一种强大的策略,用于在各种物种中发现功能性保存的基因和酶.
更多相关视频
09:14Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine
Published on: February 16, 2018
12.6K
09:27Functional Complementation Analysis FCA: A Laboratory Exercise Designed and Implemented to Supplement the Teaching of Biochemical Pathways
Published on: June 24, 2016
18.1K
相关概念视频
Biosynthesis in Bacteria
558
Biosynthesis in bacteria is a fundamental anabolic process that generates essential macromolecules, including proteins, nucleic acids, lipids, and polysaccharides. These macromolecules are critical for cellular growth, replication, and function. The process is tightly regulated and energetically linked to catabolic pathways to ensure optimal resource utilization.Biosynthetic pathways begin with precursor metabolites such as pyruvate, acetyl-CoA, and glucose-6-phosphate derived from glycolysis,...
558
Amino Acid Biosynthetic Pathways
1.1K
Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which...
1.1K
Cell Signaling in Plants
6.1K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
6.1K
C4 Pathway and CAM
48.7K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
48.7K
The Calvin Benson Cycle
5.8K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
5.8K
Carbon-dioxide Fixation
628
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
628
