KLRK1 Gene

What is the KLRK1 gene?

KLRK1 encodes killer cell lectin like receptor k1, a protein involved in NK cell activation. It belongs to the Adaptive Immunity category and is part of the Adaptive Immunity biological cluster. KLRK1 (NKG2D) is an activating NK receptor that recognizes stress ligands (MICA, MICB, ULBPs) upregulated on virus-infected, transformed, or stressed cells. It triggers NK cytotoxicity and co-stimulates CD8+ T cells.

Biological role and pathway

KLRK1 is involved in the NK cell activation pathway, which plays a central role in regulating physiological processes relevant to immune defence, cellular energy, and systemic homeostasis. Genes within the Adaptive Immunity 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 KLRK1 gene have been studied in relation to adaptive immunity and chronic illness. Each variant represents a single nucleotide position where individuals may carry different alleles.

• rs2255336— KLRK1 variant
• rs1049174— KLRK1 variant
• rs2617160— KLRK1 variant

Conditions studied in relation to KLRK1

Research into KLRK1 variants has explored associations with the following conditions. These are areas of scientific investigation and do not imply that KLRK1 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 KLRK1 and related genes in the adaptive immunity 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 Adaptive Immunity pathway

KLRK1 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