ClinVar Miner

Submissions for variant NM_053025.4(MYLK):c.1673G>A (p.Arg558His)

gnomAD frequency: 0.00003  dbSNP: rs753464560
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario RCV000769339 SCV000900720 uncertain significance Familial thoracic aortic aneurysm and aortic dissection 2016-06-23 criteria provided, single submitter clinical testing
Invitae RCV001036006 SCV001199347 uncertain significance Aortic aneurysm, familial thoracic 7 2024-01-16 criteria provided, single submitter clinical testing This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 558 of the MYLK protein (p.Arg558His). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with MYLK-related conditions. ClinVar contains an entry for this variant (Variation ID: 626515). 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 MYLK protein function with a negative predictive value of 80%. 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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