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Features include sometimes findings: Increased circulating cortisol level. 3 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 1 | Migraine |
Metabolism |
HTR1A encodes 5-hydroxytryptamine receptor 1A (422 aa). G-protein coupled receptor for 5-hydroxytryptamine (serotonin). Also functions as a receptor for various drugs and psychoactive substances. Highest expression in Brain Frontal Cortex BA9 (2.6 TPM) and Brain Cortex (2.2 TPM).
Menstrual cycle-dependent periodic fever is associated with mutations in the HTR1A gene on chromosome 5.
The HTR1A protein participates in HTR1 and 5A receptors can bind serotonin, HTR1A:HTR1A agonists, and HTR1A:HTR1A Antagonist drugs pathways.
HTR1A is classified as a druggable target (Cell Surface, Druggable Genome, and G Protein Coupled Receptor categories) with score 2.1.
Genetic testing for HTR1A is available. Testing is considered confirmatory for diagnosis.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
Data assembled from 5 of 12 sources · Last updated Sep 19, 2026, 9:59 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Fever |
Hormones | 1 | Increased circulating cortisol level |