rs1553637312
Variant summary
Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP3_Moderate
The NM_000249.4(MLH1):c.77A>C(p.Gln26Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. Q26H) has been classified as Uncertain significance.
Frequency
Consequence
NM_000249.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 6 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MLH1 | NM_000249.4 | c.77A>C | p.Gln26Pro | missense_variant | 1/19 | ENST00000231790.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MLH1 | ENST00000231790.8 | c.77A>C | p.Gln26Pro | missense_variant | 1/19 | 1 | NM_000249.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD4 exome Cov.: 31
GnomAD4 genome ? Cov.: 33
ClinVar
Submissions by phenotype
Hereditary nonpolyposis colorectal neoplasms Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Apr 21, 2017 | In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a MLH1-related disease. This sequence change replaces glutamine with proline at codon 26 of the MLH1 protein (p.Gln26Pro). The glutamine residue is highly conserved and there is a moderate physicochemical difference between glutamine and proline. - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Oct 21, 2019 | The p.Q26P variant (also known as c.77A>C), located in coding exon 1 of the MLH1 gene, results from an A to C substitution at nucleotide position 77. The glutamine at codon 26 is replaced by proline, an amino acid with similar properties. This amino acid position is highly 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. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at