CHRM3 Gene

What is the CHRM3 gene?

CHRM3 encodes cholinergic receptor muscarinic 3, a protein involved in smooth muscle cholinergic signaling. It belongs to the Autonomic category and is part of the Autonomic Nervous System biological cluster. CHRM3 encodes the M3 muscarinic receptor on smooth muscle and secretory cells mediating bronchoconstriction and gland secretion.

Biological role and pathway

CHRM3 is involved in the smooth muscle cholinergic signaling pathway, which plays a central role in regulating physiological processes relevant to immune defence, cellular energy, and systemic homeostasis. Genes within the Autonomic Nervous System cluster work together to maintain balanced function across interconnected biological systems.

Variants in genes within this pathway may influence an individual's predisposition to altered function in these systems — particularly under conditions of physiological stress such as viral infection or prolonged illness.

Known genetic variants

The following variants (SNPs) in the CHRM3 gene have been studied in relation to autonomic and chronic illness. Each variant represents a single nucleotide position where individuals may carry different alleles.

• rs543322— CHRM3 variant

Conditions studied in relation to CHRM3

Research into CHRM3 variants has explored associations with the following conditions. These are areas of scientific investigation and do not imply that CHRM3 causes or treats any condition.

Genetic insights from DNA data

Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may include CHRM3 and related genes in the autonomic nervous system pathway.

The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. Results are presented in plain English with appropriate scientific context, no medical jargon, no scare tactics. All results should be discussed with a qualified healthcare provider.

Related genes in the Autonomic Nervous System pathway

CHRM3 does not act in isolation. The following genes are functionally related and may be analysed together for a more complete picture of your genetic predispositions.

Frequently asked questions