3-37048938-G-T
Variant summary
Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1PM2PP3
The NM_000249.4(MLH1):c.2024G>T(p.Ser675Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,828 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S675N) 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 5 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MLH1 | NM_000249.4 | c.2024G>T | p.Ser675Ile | missense_variant | 18/19 | ENST00000231790.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MLH1 | ENST00000231790.8 | c.2024G>T | p.Ser675Ile | missense_variant | 18/19 | 1 | NM_000249.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD4 exome AF: 0.00000274 AC: 4AN: 1461828Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1AN XY: 727216
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:2
Uncertain significance, no assertion criteria provided | clinical testing | True Health Diagnostics | Apr 18, 2018 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jul 23, 2021 | The p.S675I variant (also known as c.2024G>T), located in coding exon 18 of the MLH1 gene, results from a G to T substitution at nucleotide position 2024. The serine at codon 675 is replaced by isoleucine, 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. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Sep 13, 2022 | Not observed in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 12799449, 20533529, 22753075) - |
Hereditary nonpolyposis colorectal neoplasms Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 04, 2023 | In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt MLH1 protein function. ClinVar contains an entry for this variant (Variation ID: 237328). This variant has not been reported in the literature in individuals affected with MLH1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces serine, which is neutral and polar, with isoleucine, which is neutral and non-polar, at codon 675 of the MLH1 protein (p.Ser675Ile). - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at