Total submissions: 3
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Women's Health and Genetics/Laboratory Corporation of America, |
RCV000587657 | SCV000696302 | pathogenic | Methylmalonic acidemia | 2017-06-26 | criteria provided, single submitter | clinical testing | Variant summary: The MUT c.1025C>A (p.Ser342X) variant results in a premature termination codon, predicted to cause a truncated or absent MUT protein due to nonsense mediated decay, which are commonly known mechanisms for disease. One truncation downstream of this position has been classified as pathogenic by our laboratory (e.g. c.1399C>T, p.Arg467X). One in silico tool predicts a damaging outcome for this variant. The variant of interest has been found in a large, broad control population, ExAC in 1/121004 control chromosomes at a frequency of 0.0000083, which does not exceed the estimated maximal expected allele frequency of a pathogenic MUT variant (0.0024152). This variant was found in methylmalonic acidemia patients in compound heterozigosity with other pathogenic variants such as MUT c.2080C>T, p.Arg694Trp and c.572C>A, p.Ala191Glu (Acquaviva_HumMut_2005, Nizon_Orph J Rare Dis_2013). Taken together, this variant is classified as pathogenic. |
| Counsyl | RCV000665393 | SCV000789509 | pathogenic | Methylmalonic aciduria due to methylmalonyl-CoA mutase deficiency | 2017-02-03 | criteria provided, single submitter | clinical testing | |
| Labcorp Genetics |
RCV001389293 | SCV001590603 | pathogenic | not provided | 2024-02-06 | criteria provided, single submitter | clinical testing | This sequence change creates a premature translational stop signal (p.Ser342*) in the MUT gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in MUT are known to be pathogenic (PMID: 15781192). This variant is present in population databases (rs770466993, gnomAD 0.0009%). This premature translational stop signal has been observed in individuals with MUT-related conditions (PMID: 15643616, 19375370). ClinVar contains an entry for this variant (Variation ID: 495777). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. |