ClinVar Miner

Submissions for variant NM_001100.4(ACTA1):c.598T>A (p.Tyr200Asn)

dbSNP: rs1553255432
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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 RCV000552290 SCV000638369 pathogenic Actin accumulation myopathy 2020-08-06 criteria provided, single submitter clinical testing For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Tyr200 amino acid residue in ACTA1. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 19562689). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has been observed in individual(s) with myopathy (Invitae). In at least one individual the variant was observed to be de novo. This variant is not present in population databases (ExAC no frequency). This sequence change replaces tyrosine with asparagine at codon 200 of the ACTA1 protein (p.Tyr200Asn). The tyrosine residue is highly conserved and there is a large physicochemical difference between tyrosine and asparagine.

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