ClinVar Miner

Submissions for variant NM_021971.4(GMPPB):c.247C>G (p.Pro83Ala)

dbSNP: rs2080451480
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV001894006 SCV002125888 uncertain significance Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A14; Muscular dystrophy-dystroglycanopathy (congenital with intellectual disability), type B14; Autosomal recessive limb-girdle muscular dystrophy type 2T 2021-02-14 criteria provided, single submitter clinical testing This sequence change replaces proline with alanine at codon 83 of the GMPPB protein (p.Pro83Ala). The proline residue is highly conserved and there is a small physicochemical difference between proline and alanine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with GMPPB-related conditions. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt GMPPB protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

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