RAMP1
Chr 2receptor activity modifying protein 1
RAMP1 encodes a single-transmembrane accessory protein that transports calcitonin receptor-like receptor (CRLR) to the plasma membrane and forms functional receptor complexes for calcitonin gene-related peptide (CGRP) and amylin signaling. Biallelic mutations cause a severe neurodevelopmental disorder with early-onset seizures, developmental delay, and microcephaly following autosomal recessive inheritance. The gene shows relatively low constraint to loss-of-function variation (pLI 0.13), consistent with recessive disease requiring biallelic variants.
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Highly tolerant — LoF variants common in population
Tolerant to missense variation
This gene has evidence for multiple mechanisms of pathogenicity (gain-of-function and dominant-negative). Both the Badonyi & Marsh prediction and the broader genomic evidence point to gain-of-function as the predominant mechanism. Different variants in this gene may act through different mechanisms — interpret in context of the specific variant.
Note: In-silico variant effect predictors (SIFT, PolyPhen, REVEL, CADD) may underestimate pathogenicity of missense variants in genes with GOF or DN mechanisms. Consider functional evidence and clinical context.
Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.
ClinVar Variant Classifications
128 submitted variants in ClinVar
Classification Summary
Curated Variants Distribution
Classified variants from ClinVar · 5 ACMG categories
| Classification | LoF | Missense + Inframe | Non-coding | Synonymous | Total |
|---|---|---|---|---|---|
Pathogenic | 0 | 0 | 79 | 0 | 79 |
Likely Pathogenic | 0 | 0 | 2 | 0 | 2 |
VUS | 0 | 27 | 7 | 0 | 34 |
Likely Benign | 0 | 6 | 0 | 0 | 6 |
Benign | 0 | 0 | 0 | 2 | 2 |
| Total | 0 | 33 | 88 | 2 | 123 |
LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly
View in ClinVar →Protein Context — Lollipop Plot
RAMP1 · protein map & ClinVar variants
Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.
External Resources
Links to major genomics databases and tools
Clinical Trials
Active and recruiting trials from ClinicalTrials.gov
External Resources
Links to major genomics databases and tools