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Introduction

The neurotensin receptor (NTSR1) belongs to the superfamily of proteins known as G protein-coupled receptors (GPCRs) and responds to the 13 amino acid hormone nuerotensin (NT). There are currently around 800 G protein-coupled receptors that have been identified and are thought to be responsible for roughly 80% of signal transduction across the cell membrane.(reference year in g protein) These receptors are involved in a vast array of physiological processes within the body that range from interactions with dopamine to effects on secretion of bile in the intestines and are a major site of drug targets in medicine. (reference 5 main families) (reference enhancement jujunem) (Reference dopamine) Neurotensin belongs to the class A G protein-coupled receptors. (reference five families)

Neurotensin

Structure

Overall Structure

Like other G protein-coupled receptors, the neurotensin receptor is composed of 3 distinct regions. An extracellular binding site where neurotensin binds and causes a conformational change of the protein, a region containing that transduce the signal from the extracellular side of the cell membrane to the intracellular side, and an intracellular region that, when activated by a conformational change in the protein, activates a G protein associated with this receptor.

Neurotensin Binding Site

Hydrophobic Stacking

Sodium Binding Pocket

Allosteric Effects

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