KYNU Gene
Kynureninase (KYNU) is a gene involved in kynurenine pathway / NAD+ synthesis that has been studied in relation to immune function, metabolism, and chronic illness. Variants in KYNU may influence how the body responds to infection, inflammation, and long-term recovery.
This page is for educational and informational purposes only. Not a diagnostic tool. Always consult a qualified healthcare provider.
What is the KYNU gene?
KYNU encodes kynureninase, a protein involved in kynurenine pathway / NAD+ synthesis. It belongs to the Metabolic category and is part of the Methylation & Neurotransmitters biological cluster. KYNU encodes kynureninase, which converts kynurenine to anthranilic acid or 3-hydroxykynurenine, a precursor to NAD+ via the de novo pathway.
Biological role and pathway
KYNU is involved in the kynurenine pathway / NAD+ synthesis pathway, which plays a central role in regulating physiological processes relevant to immune defence, cellular energy, and systemic homeostasis. Genes within the Methylation & Neurotransmitters 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.
KYNU and Long COVID / ME-CFS research
KYNU in the kynurenine pathway metabolizes tryptophan toward NAD+ or neurotoxic quinolinic acid; dysregulation may contribute to NAD+ depletion and neurological symptoms in Long COVID.
This information is based on published research and does not constitute medical advice. See references below.
Known genetic variants
The following variants (SNPs) in the KYNU gene have been studied in relation to metabolic and chronic illness. Each variant represents a single nucleotide position where individuals may carry different alleles.
- rs1065369— KYNU variant
Conditions studied in relation to KYNU
Research into KYNU variants has explored associations with the following conditions. These are areas of scientific investigation and do not imply that KYNU 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 KYNU and related genes in the methylation & neurotransmitters 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 Methylation & Neurotransmitters pathway
KYNU 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
What is the KYNU gene and what does it do?
KYNU (Kynureninase) is involved in kynurenine pathway / NAD+ synthesis. KYNU encodes kynureninase, which converts kynurenine to anthranilic acid or 3-hydroxykynurenine, a precursor to NAD+ via the de novo pathway.
How may KYNU gene variants relate to Long COVID or ME/CFS?
KYNU in the kynurenine pathway metabolizes tryptophan toward NAD+ or neurotoxic quinolinic acid; dysregulation may contribute to NAD+ depletion and neurological symptoms in Long COVID.
Can a DNA test reveal information about my KYNU gene?
Consumer DNA data from 23andMe, AncestryDNA, and MyHeritage includes SNP variants for many genes. ChronicDNA analyses your raw DNA file and reports on variants that have been studied in relation to chronic illness, immune function, and metabolism. This is not a diagnostic service — results are informational and educational only.
Explore your KYNU genetic insights
Upload your DNA data from 23andMe, AncestryDNA, or MyHeritage and receive a personalised report covering >80 genes relevant to Long COVID and ME/CFS.
Get Your Personalised DNA ReportInformational and educational only · Not a diagnostic tool · GDPR compliant
References
The following publications were used in compiling the research context for KYNU. This is not an exhaustive literature review.
- [1]PMID: 33664986
- [2]Nature Genetics
- [3]Cell Metabolism