Submissions for variant NM_000249.4(MLH1):c.1415G>A (p.Arg472Lys)

gnomAD frequency: 0.00001  dbSNP: rs63750498

Total submissions: 8

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Ambry Genetics	RCV000162406	SCV000212738	likely benign	Hereditary cancer-predisposing syndrome	2021-05-19	criteria provided, single submitter	clinical testing	This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.
Labcorp Genetics (formerly Invitae), Labcorp	RCV000541695	SCV000625065	likely benign	Hereditary nonpolyposis colorectal neoplasms	2025-01-01	criteria provided, single submitter	clinical testing
Color Diagnostics, LLC DBA Color Health	RCV000162406	SCV000689812	uncertain significance	Hereditary cancer-predisposing syndrome	2023-07-26	criteria provided, single submitter	clinical testing	This missense variant replaces arginine with lysine at codon 472 of the MLH1 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with MLH1-related disorders in the literature. This variant has been identified in 7/282836 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.
Women's Health and Genetics/Laboratory Corporation of America, LabCorp	RCV000588918	SCV000696111	uncertain significance	not provided	2017-07-03	criteria provided, single submitter	clinical testing	Variant summary: The MLH1 c.1415G>A (p.Arg472Lys) variant involves the alteration of a conserved nucleotide. 2/3 in silico tools predict a benign outcome for this variant (SNPsandGO not captured due to low reliability index). This variant was found in 5/121408 control chromosomes at a frequency of 0.0000412, which does not exceed the estimated maximal expected allele frequency of a pathogenic MLH1 variant (0.0007105). In addition, multiple clinical diagnostic laboratories/reputable databases classified this variant as uncertain significance. The variant of interest has not, to our knowledge, been reported in affected individuals via publications nor evaluated for functional impact by in vivo/vitro studies. One poster abstract reports the variant in a case of endometriosis-associated ovarian cancer, without strong evidence for causality. Because of the absence of clinical information and the lack of functional studies, the variant is classified as a variant of uncertain significance (VUS) until additional information becomes available.
GeneDx	RCV000588918	SCV001997579	uncertain significance	not provided	2019-12-23	criteria provided, single submitter	clinical testing	Has not been previously published as pathogenic or benign to our knowledge; In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect
Baylor Genetics	RCV003467275	SCV004192966	uncertain significance	Colorectal cancer, hereditary nonpolyposis, type 2	2023-07-20	criteria provided, single submitter	clinical testing
All of Us Research Program, National Institutes of Health	RCV003998540	SCV004841002	uncertain significance	Lynch syndrome	2023-12-01	criteria provided, single submitter	clinical testing	This missense variant replaces arginine with lysine at codon 472 of the MLH1 protein. Computational prediction tool is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). Splice site prediction tools suggest that this variant may not impact RNA splicing. To our knowledge, functional studies have not been performed for this variant. This variant has not been reported in individuals affected with hereditary cancer in the literature. This variant has been identified in 7/282836 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.
PreventionGenetics, part of Exact Sciences	RCV004748609	SCV005343974	uncertain significance	MLH1-related disorder	2024-04-26	no assertion criteria provided	clinical testing	The MLH1 c.1415G>A variant is predicted to result in the amino acid substitution p.Arg472Lys. To our knowledge, this variant has not been reported in the literature or in a large population database, indicating this variant is rare. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence.