相关实验视频
Updated: Jul 19, 2026

08:57
Aip1p Dynamics Are Altered by the R256H Mutation in Actin
Published on: July 30, 2014
阿拉比多 H+-PPase AVP1 调节了辅酶介导的器官发育
Jisheng Li1, Haibing Yang, Wendy Ann Peer
1Department of Plant Science, University of Connecticut, Storrs, CT 06268, USA.
概括
H+-pyrophosphatase,AVP1,通过控制辅酶运输来调节植物的发育. 过度表达AVP1增强了器官的形成,而缺少它会破坏生长和辅酶的流动.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 辅助运输对于植物发育至关重要.
- 保持真空 pH 值对于细胞功能至关重要.
研究的目的:
- 研究H+-pyrophosphatase (AVP1) 在辅酶运输和植物发育中的作用.
- 了解AVP1如何影响素依赖的发育事件.
主要方法:
- 对AVP1过度表达和avp1-1无突变的分析.
- 评估细胞分裂,器官形成和增生.
- 定量化辅助运输费率.
- 检查P-腺三酸酶和PIN1蛋白的表达.
主要成果:
- 过度表达AVP1导致细胞分裂增加,增生,并增强了辅酶运输.
- avp1-1无基因突变体表现出干扰的根部和芽部发育和减少的辅酶运输.
- AVP1表达水平影响了P-腺三酸酶和PIN1.1的分布和丰度.
结论:
- AVP1在保持真空 pH 和控制辅酶运输方面发挥着双重作用.
- AVP1是植物器官生成所必需的辅酶流的关键促进体.
相关概念视频
Allosteric Regulation
Allosteric regulation of enzymes occurs when the binding of an effector molecule to a site that is different from the active site causes a change in the enzymatic activity. This alternate site is called an allosteric site, and an enzyme can contain more than one of these sites. Allosteric regulation can either be positive or negative, resulting in an increase or decrease in enzyme activity. Most enzymes that display allosteric regulation are metabolic enzymes involved in the degradation or...
ATP Driven Pumps III: V-type Pumps
V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
GPCRs Regulate Adenylyl Cylase Activity
Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of cells.
Two...
Two...
Transducer Mechanism: Enzyme-Linked Receptors
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:

