中性lysophosphatidylcholine介导α-synuclein诱导的突触囊泡聚类
Ying Lai1,2, Chunyu Zhao3, Zhiqi Tian4
1National Clinical Research Center for Geriatrics, West China Hospital, State Key Laboratory of Biotherapy and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, Sichuan 610065, China.
概括
阿尔法-同核素 (α-Syn) 与中性溶解酸丁胆 (lysoPC) 相互作用,促进囊泡集群,独立于离子脂质. 这种相互作用对α-Syn至关重要.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 阿尔法-同核素 (α-Syn) 是一种涉及帕金森病的前突触蛋白.
- α-Syn与负电荷的脂结合,并聚合合成囊泡.
- 这种聚类活动取决于与离子脂的相互作用.
研究的目的:
- 为了研究α-Syn与中性脂的相互作用.
- 为了确定 lysophosphatidylcholine (lysoPC) 在α-Syn诱导的囊泡聚类中的作用.
- 为了检查与帕金森病相关的A30P突变对lysopc相互作用和囊泡聚类的影响.
主要方法:
- 利用模仿突触囊泡的合成蛋白质体.
- 进行了囊泡聚类试验.
- 进行了单个囊泡-囊泡融合试验.
- 评估了α-Syn及其A30P突变体与lysopc的结合亲和力.
主要成果:
- 奇怪的是,α-Syn与中性脂溶酸盐胆 (lysophosphatidylcholine,lysoPC) 相互作用.
- lysoPC促进α-Syn诱导的囊泡集群,即使没有离子脂质.
- 在单个囊泡-囊泡融合试验中,lysOPC不会影响Ca2+触发的聚变.
- α-Syn的A30P突变体对lysopc的亲和力降低,囊泡聚类受损.
结论:
- α-Syn和lysopc之间的相互作用在α-Syn功能中起着重要作用.
- 这种相互作用可能对α-Syn在突触囊泡动力学中的作用至关重要.
- 功能障碍的α-Syn-lysoPC相互作用可能会导致帕金森病的发病.
相关概念视频
Fusion of Secretory Vesicles with the Plasma Membrane
11.1K
Proteins and neurotransmitters in secretory vesicles can be released from a cell upon vesicle docking, priming, and fusion with the plasma membrane. Vesicles are docked and primed in preparation for the quick exocytosis of their contents in response to a stimulus. The fusion process is mainly carried out by a SNAP Receptor or SNARE complex, consisting of synaptobrevin, syntaxin-1, and SNAP-25.
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
11.1K
Lysosomal Hydrolases
3.8K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.8K
Chemical Synapses
8.9K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
8.9K
Cholinergic Neurons: Neurotransmission
3.0K
Cholinergic neurotransmission involves the synthesis and the release of acetylcholine (ACh) in order to transmit nerve impulses across the synapse. The process begins with the synthesis of acetyl CoA, a precursor for ACh, from ATP, acetate, and coenzyme A in the mitochondria. Choline, another vital precursor, is transported inside the neuron through choline transporters, including high-affinity choline transporter CHT1, low-affinity choline transporter CTL1, and lower-affinity choline...
3.0K
Overview of Secretory Vesicles
8.6K
Secretory vesicles, also known as dense core vesicles (DCVs), are membrane-bound vesicles that transport secretory proteins, such as hormones or neurotransmitters. Regulated secretory vesicles transport proteins from the trans-Golgi network to the exterior of the cell. Proteins present in regulated secretory vesicles are required to be rapidly exocytosed in large amounts upon a specific stimulus.
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
8.6K
Synthesis of Phosphatidylcholine in the ER Membrane
3.1K
The ER synthesizes lipids for building cell membranes and performing cellular functions such as energy storage and signaling. The lipid synthesis machinery embedded in the ER membrane primarily collects all reactants from the cytosol. Following synthesis, the secretory pathway and the ER contact sites distribute these lipids to other cellular organelles. Additionally, the energy-rich triacylglycerides are transported from the ER via lipid droplets.
The major components of all eukaryotic cell...
The major components of all eukaryotic cell...
3.1K


