尼马托囊中BK通道的功能从海的振动敏感细胞支持细胞复合体中排放的尼马托囊Diadumene lineata
相关实验视频
Updated: Jun 21, 2025

15:19
Dissecting and Recording from The C. Elegans Neuromuscular Junction
Published on: February 25, 2009
15.6K
The Biological bulletin
|July 8, 2024
概括
大导电 (BK) 通道对于海中阴毛囊排放至关重要. 这项研究证明了它们在对振动敏感的猎物捕获中的功能,标志着在非双边动物中第一个功能性证据.
科学领域:
- 海洋生物学 海洋生物学
- 离子通道生理学 离子通道生理学
- 细胞机械传导 细胞机械传导
背景情况:
- 海中的内马托囊排泄由涉及流入的化学和机械传感途径来调节.
- 的流入往往与激活的大导电 (BK) 通道相结合.
研究的目的:
- 为了研究BK通道在海中的内马托囊排放中起作用的假设,海 *Diadumene lineata*.
- 为了识别和描述海中的BK通道同类物.
主要方法:
- 使用BK通道阻断剂的功能测试,以评估D. lineata*中杀死猎物的抑制.
- 生物信息分析以确定BK通道α子单元序列在*Exaiptasia diaphena*和*D. lineata*转录组中.
- 使用单细胞RNA测序数据在水中定位BK通道同类物.
主要成果:
- 选择性BK通道阻断剂显著抑制了D. lineata*中的猎物杀戮.
- 帕克西林选择性地抑制了以振动敏感的核细胞为媒介的猎物杀戮.
- 在 *E. diaphena* 和 *D. lineata* 中确定了假定的 BK α 亚单元序列,后者局部化到水中的脑细胞.
结论:
- BK通道在功能上表达为 *D. lineata* ,并在对振动敏感的脑膜囊排泄中发挥作用.
- 这代表了BK通道在非双元生物体中的首次功能性演示.
- BK通道可能参与蛋白质激酶A介导的状细胞放电的频率调节.
更多相关视频
相关概念视频
Channel Rhodopsins
2.5K
Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
2.5K
Action Potential
7.9K
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they...
7.9K
Voltage-gated Ion Channels
8.2K
Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
8.2K
Action Potentials
130.5K
Overview
130.5K
The Role of Ion Channels in Neuronal Computation
3.2K
A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
3.2K
Ion Channels
86.7K
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
86.7K

