ClinVar Miner

Submissions for variant NM_144670.6(A2ML1):c.1538-13T>A

gnomAD frequency: 0.00001  dbSNP: rs765050311
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Women's Health and Genetics/Laboratory Corporation of America, LabCorp RCV001293558 SCV001482158 benign not specified 2021-02-15 criteria provided, single submitter clinical testing Variant summary: A2ML1 c.1538-13T>A alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 8e-05 in 249460 control chromosomes, predominantly at a frequency of 0.00055 within the Latino subpopulation in the gnomAD database. The observed variant frequency within Latino control individuals in the gnomAD database is approximately 138 fold of the estimated maximal expected allele frequency for a pathogenic variant in A2ML1 causing Noonan Syndrome phenotype (4e-06), strongly suggesting that the variant is a benign polymorphism found primarily in populations of Latino origin. To our knowledge, no occurrence of c.1538-13T>A in individuals affected with Noonan Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as benign.
Labcorp Genetics (formerly Invitae), Labcorp RCV002070124 SCV002384700 likely benign not provided 2024-12-20 criteria provided, single submitter clinical testing
Breakthrough Genomics, Breakthrough Genomics RCV002070124 SCV005213740 likely benign not provided criteria provided, single submitter not provided

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