ClinVar Miner

Submissions for variant NM_001101426.4(CRPPA):c.124C>T (p.Arg42Cys)

dbSNP: rs1415518757
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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 RCV001042452 SCV001206132 uncertain significance Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A, 7; Autosomal recessive limb-girdle muscular dystrophy type 2U 2019-11-21 criteria provided, single submitter clinical testing This sequence change replaces arginine with cysteine at codon 42 of the ISPD protein (p.Arg42Cys). The arginine residue is weakly conserved and there is a large physicochemical difference between arginine and cysteine. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the ExAC database. This variant has not been reported in the literature in individuals with ISPD-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The cysteine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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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