ClinVar Miner

Submissions for variant NM_001101426.4(CRPPA):c.899A>G (p.His300Arg)

gnomAD frequency: 0.00001  dbSNP: rs1345477841
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV001773795 SCV001991990 uncertain significance not provided 2019-04-09 criteria provided, single submitter clinical testing Not observed at a significant frequency in large population cohorts (Lek et al., 2016); Has not been previously published as pathogenic or benign to our knowledge
Labcorp Genetics (formerly Invitae), Labcorp RCV002241576 SCV002508457 uncertain significance Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A, 7; Autosomal recessive limb-girdle muscular dystrophy type 2U 2021-11-24 criteria provided, single submitter clinical testing This sequence change replaces histidine, which is basic and polar, with arginine, which is basic and polar, at codon 300 of the ISPD protein (p.His300Arg). This variant is present in population databases (no rsID available, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with ISPD-related conditions. ClinVar contains an entry for this variant (Variation ID: 1305085). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The arginine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect 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.
Ambry Genetics RCV004907721 SCV005567223 uncertain significance not specified 2024-07-14 criteria provided, single submitter clinical testing The c.899A>G (p.H300R) alteration is located in exon 6 (coding exon 6) of the ISPD gene. This alteration results from a A to G substitution at nucleotide position 899, causing the histidine (H) at amino acid position 300 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

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