KCNJ2 Gene

What is the KCNJ2 gene?

KCNJ2 encodes potassium inwardly rectifying channel subfamily j member 2 (kir2.1), a protein involved in cardiac inward rectifier / resting potential. It belongs to the Cardiovascular category and is part of the Autonomic Nervous System biological cluster. KCNJ2 encodes Kir2.1, an inward rectifier K+ channel maintaining the cardiac resting membrane potential; mutations cause Andersen-Tawil syndrome.

Biological role and pathway

KCNJ2 is involved in the cardiac inward rectifier / resting potential 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 KCNJ2 gene have been studied in relation to cardiovascular and chronic illness. Each variant represents a single nucleotide position where individuals may carry different alleles.

• rs149899650— KCNJ2 variant

Conditions studied in relation to KCNJ2

Research into KCNJ2 variants has explored associations with the following conditions. These are areas of scientific investigation and do not imply that KCNJ2 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 KCNJ2 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

KCNJ2 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