PepFold

SNP Database

rs1800497ANKK1/DRD2 Taq1A (Glu713Lys)

Risk factor · ~20% global (A1 allele)

rs1800497 (Taq1A) is near the DRD2 dopamine receptor gene and reduces D2 receptor density in the striatum by 30-40%. It is associated with increased risk of substance use disorders, reward-seeking behavior, and obesity.

Molecular Mechanism

The variant is in the ANKK1 gene, ~10 kb downstream of DRD2, but affects DRD2 expression through regulatory mechanisms. Reduced D2 receptor availability creates a 'reward deficiency syndrome' where individuals seek more intense stimulation to achieve normal dopamine signaling.

Peptide Therapeutic Relevance

DRD2-modulating peptides and dopamine system-targeting neuropeptides are emerging therapeutic approaches for addiction. PepFold generates candidates exploring D2 receptor positive allosteric modulation.

Condition: Addiction Susceptibility (DRD2/OPRM1)

Genetic variation in dopamine (DRD2/ANKK1) and opioid (OPRM1) receptor systems creates differential vulnerability to substance use disorders. Personalized pharmacotherapy guided by genotype is an emerging paradigm.

Prevalence: ~35 million people worldwide with substance use disorders (UNODC 2023)

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