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rs34579341 Intronic tag SNP in NEGR1 affecting neuronal cell adhesion, hippocampal neurogenesis, and monoaminergic neurotransmission — the G allele is associated with increased risk of major depression, anxiety disorders, and elevated BMI through shared hypothalamic circuits
Chromosome 1 Risk Allele G Category Mood & Behavior Tags Depression, Anxiety, Neuroplasticity, Mood, Appetite, Cognition

At the intersection of brain chemistry and body weight lies a gene most people have never heard of. NEGR1() encodes a molecular "social glue" that neurons use to recognize and bond with each other. Variants in NEGR1 have been replicated across virtually every major depression genome-wide association study (GWAS) of...

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rs3790565 Intronic IL12RB2 variant associated with IL-12 signaling pathway variation and susceptibility to Th1-mediated autoimmune conditions including primary biliary cholangitis, allergic rhinitis, and endometriosis
Chromosome 1 Risk Allele C Category IBD & Mucosal Immunity Tags Autoimmune, Immune Function, T-Cell Regulation, Inflammation, Type 1 Diabetes, Autoimmunity

Interleukin-12 (IL-12) (https://pubmed.ncbi.nlm.nih.gov/10651948/) is one of the master switches of adaptive immunity. Its receptor on T and NK cells consists of two subunits: IL-12Rβ1 (encoded by IL12RB1) and IL-12Rβ2 (encoded by IL12RB2). The β2 subunit is the key signaling component — it carries the intracellular...

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rs3804099 Synonymous variant in Toll-Like Receptor 2 affecting mRNA stability and splicing, associated with pulmonary tuberculosis susceptibility, cancer risk modification, and anti-TNF treatment response in inflammatory bowel disease
Chromosome 4 Risk Allele C Category Innate Immunity & Infection Defense Tags Innate Immunity, Infectious Disease, Immune & Gut, Inflammation, Immune System

Not all genetic variants that matter change an amino acid. Toll-Like Receptor 2 (TLR2)(https://www.ncbi.nlm.nih.gov/gene/7097) carries a synonymous variant — rs3804099, also written as T597C or 19216T/C — where a single nucleotide change in the coding sequence leaves the encoded amino acid identical but may not...

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rs3816769 Intronic STAT3 variant where the T allele (reference, ~66%) increases risk for autoimmune thyroid disease, Crohn's disease, and lung cancer while the protective C allele correlates with higher STAT3 expression
Chromosome 17 Risk Allele T Category TNF, NF-kB & Inflammatory Cytokines Tags Autoimmune, Inflammation, JAK-STAT Signaling, IBD, Thyroid

STAT3(https://www.ncbi.nlm.nih.gov/gene/6774) occupies one of the most contested positions in immunology: it is simultaneously required for anti-inflammatory resolution and for driving the Th17 cell differentiation that underlies autoimmune pathology. This intronic variant at position 42,346,255 on chromosome 17...

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rs3825942 Missense variant in the elastin-crosslinking enzyme LOXL1; the common G allele is one of the strongest known genetic risk factors for exfoliation syndrome and exfoliation glaucoma, a leading cause of secondary glaucoma worldwide
Chromosome 15 Risk Allele G Category Coronary Artery Disease & Atherosclerosis Tags Eye Health, Glaucoma, Connective Tissue, Extracellular Matrix, Cardiovascular, Inflammation, Aortic Wall, Elastin

Buried in the structure of every elastic tissue in your body — blood vessels, lungs, skin, eyes — is a protein called LOXL1 (Lysyl Oxidase-Like 1)(https://omim.org/entry/153700). Without functional LOXL1, elastin fibers fail to assemble properly, accumulating as disorganized fibrillar material in tissues throughout...

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rs396514912 Protein-truncating frameshift deletion in obscurin; homozygous or compound heterozygous carriers lose functional obscurin in muscle, predisposing to recurrent, exercise-triggered rhabdomyolysis.
Chromosome 1 Risk Allele D Category Cardiomyopathy & Structural Heart Tags Muscle, Cardiovascular, Heart Disease, Exercise Recovery, Carrier Status, Genetic Counseling

Obscurin — encoded by OBSCN on chromosome 1q42 — is one of the largest proteins in the human body, a giant sarcomeric scaffold of nearly 800 kDa expressed in both cardiac and skeletal muscle. At the M-band and Z-disks of each sarcomere, obscurin tethers the sarcoplasmic reticulum to the...

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rs397507172 Rare missense variant near the BTD active site (p.Val89Gly) that likely reduces biotinidase enzyme activity; heterozygous carriers have partial enzyme reduction while biallelic inheritance causes biotinidase deficiency
Chromosome 3 Risk Allele G Category Vitamins & Nutrient Absorption Tags B Vitamins, Micronutrients, Carrier Status, Genetic Counseling, Metabolism, Congenital

Every time your body breaks down a protein that used biotin as a cofactor, it produces biocytin — a biotin molecule still attached to a lysine residue. Recovering that biotin for reuse is the job of biotinidase(https://www.ncbi.nlm.nih.gov/books/NBK1322/). When biotinidase activity falls too low, biotin cannot be...

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rs41295061 Regulatory variant in the IL2RA locus altering LEF1 transcription factor binding and soluble IL-2 receptor levels — the C allele increases type 1 diabetes susceptibility while the minor A allele raises Graves' disease risk
Chromosome 10 Risk Allele C Category Autoimmune Tolerance & T-Cell Regulation Tags Autoimmune, Type 1 Diabetes, T-Cell Regulation, Inflammation, Thyroid, Immune & Autoimmune

The interleukin-2 receptor alpha chain (IL-2Rα, also called CD25) sits at a critical junction in immune regulation. When IL-2 binds to its receptor on T cells, it triggers proliferation of both effector T cells that drive immune responses and regulatory T cells (Tregs) that shut them down. The balance between these...

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rs490683 Promoter variant in the ghrelin receptor gene that disrupts NF-1 transcription factor binding; the G allele preserves the binding site and elevates GHSR expression, increasing appetite drive and resistance to dietary weight loss intervention
Chromosome 3 Risk Allele G Category Appetite & Obesity Tags Appetite, Obesity, Satiety, Metabolic Health, Hormones, Fat Metabolism

Ghrelin is the stomach's hunger signal — it rises before meals and drives appetite through the growth hormone secretagogue receptor (GHSR-1a)(https://pubmed.ncbi.nlm.nih.gov/28134808/). How much GHSR protein is available in the brain determines how strongly ghrelin can drive eating behavior. rs490683 sits in the...

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rs519664 Intronic variant in TTC39B (9p22) that increases endometriosis susceptibility; the T allele carries an OR of 1.29 for endometriosis, with a stronger effect on stage III/IV disease (OR 1.35). TTC39B is a regulator of LXR protein stability that controls HDL cholesterol metabolism, suggesting the endometriosis association may act through lipid-mediated inflammatory signalling in the peritoneal environment.
Chromosome 9 Risk Allele T Category Endometriosis & Uterine Health Tags Endometriosis, Fertility, Women's Health, Inflammation, Lipid Metabolism, HDL Cholesterol

On the short arm of chromosome 9, an intronic variant in TTC39B(https://www.ncbi.nlm.nih.gov/gene/158865) has emerged as one of only a handful of robustly confirmed genetic risk factors for endometriosis. The rs519664 T allele increases endometriosis risk by approximately 29% and carries an even stronger association...

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