GRM5, variants, traits, and what the research shows

GRM5 - what this gene does

Variants across GRM5 have been catalogued in connection with five trait domains - mental health, rare disease, cancer, immune function, and vision - through GWAS (genome-wide association studies, which scan large numbers of people's genomes to identify variants that appear more often in individuals with a given trait).

Key takeaways

• Three separate mental health-associated variants appear independently in this dataset, making mental health the most internally replicated trait domain for this gene.
• The highest-magnitude variant on file is linked to rare disease research.
• A cancer-linked variant has a dedicated published research page.
• Immune function and vision are each represented by at least one moderate-magnitude variant.
• All signals here are population-level statistical associations, not individual-level predictors.

Notable variants

The single highest-magnitude entry on file, rs201851359 (magnitude 5.50), is linked to rare disease. At the next tier (magnitude 4.50), rs117391968 is associated with cancer and has a dedicated research page; rs518167 links to immune traits; and rs661177 to vision. Three additional magnitude-4.50 variants - rs604551, rs674437, and rs681820 - all independently associate with mental health. A further entry at this tier, rs7483991, appears without a specific trait label in the current dataset.

Trait associations

Five trait themes emerge across this gene's variant catalogue. Mental health shows the broadest within-dataset replication: rs604551, rs674437, and rs681820 all independently flag this domain at magnitude 4.50 - three separate variants pointing to the same trait strengthens, though does not confirm, the signal. Rare disease is represented at the highest magnitude by rs201851359. Cancer associations appear via rs117391968. Immune-related traits are linked through rs518167, and vision-related traits through rs661177. A further twelve variants in this gene carry magnitude-3.00 signals; specific trait labels are not available for most of them in the current dataset.

Evidence quality

The strongest single signal is rs201851359 at magnitude 5.50, associated with rare disease. Seven variants sit at magnitude 4.50, spanning mental health (three variants), cancer, immune, and vision - a tier representing moderate-evidence associations. The remaining entries carry magnitude-3.00 signals with limited trait annotation. No quantitative effect sizes (such as odds ratios or beta coefficients) or sample sizes are included in the current data for any of these variants, which limits independent assessment of signal strength. The mental health domain has the most internal replication within this gene's dataset (three independent variants), but confirmation across independent cohorts cannot be established from this source alone.

What this is NOT

These variants are population-level statistical signals from group studies and are not deterministic predictors of any outcome for any individual. This content is informational only - it does not constitute medical advice, a diagnosis, or a recommendation for any action.