ClinVar Miner

Submissions for variant NM_000151.4(G6PC1):c.497T>C (p.Val166Ala)

dbSNP: rs104894571
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Counsyl RCV000672716 SCV000797850 uncertain significance Glycogen storage disease due to glucose-6-phosphatase deficiency type IA 2018-02-13 criteria provided, single submitter clinical testing
Fulgent Genetics, Fulgent Genetics RCV000672716 SCV002786518 uncertain significance Glycogen storage disease due to glucose-6-phosphatase deficiency type IA 2022-02-09 criteria provided, single submitter clinical testing
Invitae RCV000672716 SCV004297780 likely pathogenic Glycogen storage disease due to glucose-6-phosphatase deficiency type IA 2023-08-25 criteria provided, single submitter clinical testing This missense change has been observed in individual(s) with glycogen storage disease type 1a (PMID: 10834516, 10874313). This variant is not present in population databases (gnomAD no frequency). ClinVar contains an entry for this variant (Variation ID: 556681). This sequence change replaces valine, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 166 of the G6PC protein (p.Val166Ala). In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. This variant disrupts the p.Val166Gly amino acid residue in G6PC. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 7623438). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Experimental studies have shown that this missense change affects G6PC function (PMID: 11739393). 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 expected to disrupt G6PC protein function.

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