Ligand-gated ion channel gatekeeper?

Answer

Ligand-Gated Ion Channel Gatekeeper

This discussion entails an evaluation of what ligand-gated ion channel gatekeepers are and their importance. The definition of the ligand-gate ion channel gatekeeper is provided, their importance in the nervous system and interactions with other proteins are provided.

Ligand-gated ion channel (LGICs) refer to integral membrane proteins comprising of a pore that allows the controlled flow of particular ions through the plasma membrane. Notably, the ion flux is both passive and influenced by a gradient that is electrochemical for the ions that are permeant (Alexander, Mathie, & Peters, 2011). The channels may be gated or opened by the neurotransmitter binding to the orthostatic site, which causes a conformational alternation resulting in a conducting condition. Gating modulation happens through binding the modulators (exogenous or endogenous) to the allosteric sites. Also, LGICs rapidly mediate the synaptic transmission on a time scale of milliseconds in the nervous system at the neuromuscular junction. Essentially, the transmission entails releasing the neurotransmitter from the pre-synaptic neurone followed by the activation of receptors located post-synaptically. These receptors mediate the phasic, rapid, and electric signals, which may be inhibitory, excitatory, and the post-synaptic potential.

The ligand-gated ion channels play a vital role in the nervous system intercellular communication. The ion-channels are cellular machinery for the ion flux throughout the membranes and are the foundation of exciting the neurons electrically. According to Li, Wong, and Liu (2014), the ligand-gated ion channels are oligomeric protein assemblies, whose role is to convert the chemical signals into ion flux. This conversion occurs through the post-synaptic membrane. The importance of the ligand-gated ion channels is reflected in the primary brain functions, including memory, learning, and attention. The importance of the ligand-gated ion channel is examined from the unique application of the superfamily. Members of the ligand-gated ion channel family include glycine, adenosine triphosphate (ATP), nicotinic acetylcholine receptors (nAChRs), and gamma-aminobutyric acid (GABA). The NMDA (N-Methyl-D-aspartate) receptors, for instance, are permeable to sodium and calcium. These receptors are vital for memory, learning, and plasticity. In addition, these receptors are involved in neurological disorders, including ischemic stroke and addiction to nicotine.

The function of the ion-channel is balanced by how they interact with different proteins. Notably, different proteins influence the position and number of specific subunits in the gathered channel. Other aspects influenced by the various proteins are the changes of trafficking the receptors, and the turnover, assembly, and stability in the intracellular pathways and the membrane’s receptors. These interactions allow for the fine-tuning of the ion-channels based on the intracellular states and external stimuli. The molecular interactions networks allow for a complex signalling processing through the neurons. Also, the interaction reveals the new targets for manipulating the neuron function pharmacologically and could be useful in the clinical setting. Li et al. (2014) espouse that the knowledge of these interactions has progressed and more are likely to be discovered. The discoveries regarding these interactions are essential in therapies. For instance, the interactions between the ligand-gated ion channel and other ion channels are reflected in how the α7nACh receptor second intracellular loop directly bind with the NMDA receptor NR2 carboxyl tail. Notably, this interaction fosters the phosphorylation of ERK ½. Essentially, this interaction is vital in the clinical setting, especially the addiction to nicotine. The interaction can also be used in therapies such as smoking cessation.

In summary, the ligand-gated ion channel is essential in communication in the nervous system. The LGICs entail the integral protein that comprises of a pore that permits the regulated flow of specified ions through the plasma membrane. Other applications of ligand-gated ion channels include memory, learning, attention, and addiction therapies.