chr3-37008890-T-C
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1PM2BP4
The NM_000249.4(MLH1):āc.530T>Cā(p.Leu177Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000197 in 152,220 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). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L177F) has been classified as Uncertain significance.
Frequency
Consequence
NM_000249.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 3 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MLH1 | NM_000249.4 | c.530T>C | p.Leu177Ser | missense_variant | 6/19 | ENST00000231790.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MLH1 | ENST00000231790.8 | c.530T>C | p.Leu177Ser | missense_variant | 6/19 | 1 | NM_000249.4 | P1 |
Frequencies
GnomAD3 genomes AF: 0.0000197 AC: 3AN: 152220Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251438Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135886
GnomAD4 exome Cov.: 30
GnomAD4 genome AF: 0.0000197 AC: 3AN: 152220Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2AN XY: 74374
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Sep 18, 2017 | The p.L177S variant (also known as c.530T>C), located in coding exon 6 of the MLH1 gene, results from a T to C substitution at nucleotide position 530. The leucine at codon 177 is replaced by serine, an amino acid with dissimilar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Mar 11, 2020 | This missense variant replaces leucine with serine at codon 177 of the MLH1 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). Splice site prediction tools suggest that this variant may not impact RNA splicing. To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with hereditary cancer in the literature. This variant has been identified in 2/282848 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. - |
Colorectal cancer, hereditary nonpolyposis, type 2 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Baylor Genetics | May 28, 2023 | - - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Aug 26, 2022 | Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 22753075) - |
Hereditary nonpolyposis colorectal neoplasms Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Invitae | Oct 14, 2022 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at