rs567838745
Variant summary
Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_StrongBP6BP7
The NM_000249.4(MLH1):c.1743G>A(p.Pro581=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000254 in 1,614,078 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. P581P) has been classified as Likely benign.
Frequency
Consequence
NM_000249.4 synonymous
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -6 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MLH1 | NM_000249.4 | c.1743G>A | p.Pro581= | synonymous_variant | 16/19 | ENST00000231790.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MLH1 | ENST00000231790.8 | c.1743G>A | p.Pro581= | synonymous_variant | 16/19 | 1 | NM_000249.4 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.0000394 AC: 6AN: 152140Hom.: 0 Cov.: 31
GnomAD3 exomes AF: 0.0000597 AC: 15AN: 251262Hom.: 0 AF XY: 0.0000589 AC XY: 8AN XY: 135786
GnomAD4 exome AF: 0.0000239 AC: 35AN: 1461820Hom.: 0 Cov.: 31 AF XY: 0.0000220 AC XY: 16AN XY: 727212
GnomAD4 genome ? AF: 0.0000394 AC: 6AN: 152258Hom.: 0 Cov.: 31 AF XY: 0.0000403 AC XY: 3AN XY: 74444
ClinVar
Submissions by phenotype
Colorectal cancer, hereditary nonpolyposis, type 2 Uncertain:1Benign:2
Benign, criteria provided, single submitter | clinical testing | Myriad Genetics, Inc. | Mar 13, 2023 | This variant is considered benign. This variant is a silent/synonymous amino acid change and it is not expected to impact splicing. - |
Likely benign, criteria provided, single submitter | clinical testing | Counsyl | Feb 14, 2017 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | May 02, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. - |
Hereditary cancer-predisposing syndrome Benign:3
Likely benign, criteria provided, single submitter | clinical testing | Ambry Genetics | Aug 05, 2014 | 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. - |
Benign, criteria provided, single submitter | curation | Sema4, Sema4 | Nov 28, 2020 | - - |
Likely benign, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Apr 07, 2016 | - - |
not specified Benign:2
Likely benign, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Feb 12, 2019 | Variant summary: The variant, MLH1 c.1743G>A alters a non-conserved nucleotide resulting in a synonymous change. 5/5 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 6.1e-05 in 276996 control chromosomes (gnomAD). This frequency is not significantly higher than expected for a pathogenic variant in MLH1 causing Lynch Syndrome (6.1e-05 vs 0.00071), allowing no conclusion about variant significance. The variant, c.1743G>A has been reported in the literature in an individual affected with colorectal cancer (Crucianelli_2014). However, this report does not provide unequivocal conclusions about association of the variant with Lynch Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as likely benign. Based on the evidence outlined above, the variant was classified as likely benign. - |
Likely benign, criteria provided, single submitter | clinical testing | GeneDx | Jan 11, 2018 | This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. - |
Lynch syndrome Benign:1
Likely benign, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | Jan 11, 2024 | - - |
not provided Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Quest Diagnostics Nichols Institute San Juan Capistrano | Aug 29, 2023 | - - |
MLH1-related disorder Benign:1
Likely benign, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | Apr 05, 2019 | This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). - |
Hereditary nonpolyposis colorectal neoplasms Benign:1
Benign, criteria provided, single submitter | clinical testing | Invitae | Jan 25, 2024 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at