Variant: NR_003051.4(RMRP):n.263C>G

CA464450136

552081 (ClinVar)

Gene: RMRP

Condition: cartilage-hair hypoplasia

Inheritance Mode: Autosomal recessive inheritance

UUID: 9bca14fb-743e-40ff-aa85-08b132b8634e

Approved on: 2025-06-10

Published on: 2025-06-10

HGVS expressions

NR_003051.4:n.263C>G
NR_003051.4(RMRP):n.263C>G
NC_000009.12:g.35657757G>C
CM000671.2:g.35657757G>C
NC_000009.11:g.35657754G>C
CM000671.1:g.35657754G>C
NC_000009.10:g.35647754G>C
NG_017041.1:g.5262C>G
NG_033120.1:g.4468G>C
NR_003051.3:n.262C>G

Uncertain Significance

• Met criteria codes: PP4 PM2_Supporting

Expert Panel

Severe Combined Immunodeficiency Disease VCEP

Criteria Specification Information

Criteria Specification: ClinGen Severe Combined Immunodeficiency Disease Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for RMRP Version 1.0.0

Evidence submitted by expert panel

Severe Combined Immunodeficiency Disease VCEP

This variant has been found in gnomAD v4 with an allele frequency of 0.000007990 in the African/ African American population. This variant is below the threshold that the SCID VCEP established to use PM2_Supporting (< 0.0000447). Therefore, this criterion is met: PM2_Supporting. At least one patient (P5, PMID: 16244706) has been described with this variant (also known as g.260C>G). The patient presented with metaphyseal dysplasia (+1.0), immune deficiency phenotype (+0.5), and hematological disease (+0.25), reaching a total of 1.75 points. Therefore PP4 is met at default strength. In summary, this variant is classified as uncertain significance - insufficient evidence for Autosomal Recessive Cartilage Hair Hypoplasia based on the ACMG/AMP criteria applied, as specified by the ClinGen SCID VCEP: PM2_Supporting, PP4 (SCID VCEP specifications version 1).

Met criteria codes

• PP4: At least one patient (P5, PMID: 16244706) has been described with this variant (also known as g.260C>G). The patient presented with metaphyseal dysplasia (+1.0), immune deficiency phenotype (+0.5), and hematological disease (+0.25), reaching a total of 1.75 points. Therefore PP4 is met at default strength.
• PM2_Supporting: This variant has been found in gnomAD v4 with an allele frequency of 0.000007990 in the African/ African American population. This variant is below the threshold that the SCID VCEP established to use PM2_Supporting (< 0.0000447). Therefore this criterion is met PM2_Supporting