Melatonin, Endogenous hormone agonist at MT1 and MT2 receptors

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

Estrogen Receptor Aryl Hydrocarbon Receptor Cytochrome P450 enzymes PXR and Melatonin Receptors are important proteins involved in various physiological processes. Estrogen Receptor (ER) is a nuclear hormone receptor also known as ESR1 and its mass is approximately 66 kDa. ER is expressed in tissues like breast and uterus. Aryl Hydrocarbon Receptor (AhR) functions as a ligand-activated transcription factor and is found in a variety of tissues including liver and lungs. Cytochrome P450 1A2 (CYP1A2) and 3A4 (CYP3A4) are important for drug metabolism with CYP1A2 primarily in the liver and CYP3A4 in liver and intestine. PXR (Pregnane X Receptor) acts as a sensor for foreign substances and it is expressed mainly in the liver and intestine. Melatonin Receptors 1A (MTNR1A) and 1B (MTNR1B) are G protein-coupled receptors found in the central nervous system and retina.

Biological function summary

These proteins play significant roles in regulating body functions. Estrogen Receptor modulates gene transcription in response to estrogen and affects reproductive tissue growth. AhR participates in xenobiotic metabolism and detoxification processes. CYP1A2 and CYP3A4 are involved in the metabolism of drugs and endogenous compounds. PXR senses toxic substances and regulates the expression of enzymes like CYP3A4. MTNR1A and MTNR1B mediate the effects of melatonin an endogenous hormone on circadian rhythms and seasonal physiological functions. Together these receptors and enzymes form part of complexes that adjust biological responses to hormones and environmental signals.

Pathways

These proteins integrate into critical biological routes. Estrogen Receptor and AhR both interact with the hormone structure pathway influencing estrogen-associated transcription and xenobiotic response. Interestingly CYP3A4 linked via PXR is part of the drug metabolism pathway interacting with other proteins like CAR and RXR to regulate enzyme expression upon exposure to medications. AhR and CYP1A2 contribute to the aryl hydrocarbon receptor pathway which is essential for detoxifying harmful compounds and protection against oxidative stress and damage.

These targets connect to various health issues. Estrogen Receptor can influence breast cancer development as its signaling impacts cell proliferation and survival with implications for treatments targeting ER-positive tumors. CYP1A2 and CYP3A4 have associations with liver disorders due to their roles in metabolizing potentially hepatotoxic drugs. The Melatonin Receptors MTNR1A and MTNR1B relate to sleep disorders and are studied for their roles in sleep regulation and potential links to depression. Disorders in these pathways may also involve proteins such as PXR which can exacerbate metabolic diseases by altering drug and hormone metabolism.