rs140342925
Variant summary
Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM1PM2PM5PP3_StrongPP5
The NM_001048174.2(MUTYH):c.650G>T(p.Arg217Leu) variant causes a missense change. 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R217C) has been classified as Pathogenic.
Frequency
Consequence
NM_001048174.2 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 11 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
MUTYH | ENST00000456914.7 | c.650G>T | p.Arg217Leu | missense_variant | Exon 9 of 16 | 1 | NM_001048174.2 | ENSP00000407590.2 | ||
ENSG00000288208 | ENST00000671898.1 | n.1238G>T | non_coding_transcript_exon_variant | Exon 13 of 21 | ENSP00000499896.1 |
Frequencies
GnomAD3 genomes Cov.: 33
GnomAD4 exome Cov.: 36
GnomAD4 genome Cov.: 33
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Pathogenic:1
The p.R245L variant (also known as c.734G>T), located in coding exon 9 of the MUTYH gene, results from a G to T substitution at nucleotide position 734. The arginine at codon 245 is replaced by leucine, an amino acid with dissimilar properties. Another variant at the same codon, p.R245H (c.734G>A), has been reported in both the homozygous and compound heterozygous state in multiple individuals with colon polyposis and/or colorectal cancer (Aceto G et al. Hum. Mut. 2005 Oct;26:394; Russell AM et al. Int. J. Cancer. 2006 Apr;118:1937-40; Piccioli P et al. Clin. Chem. 2006 Apr;52:739-43; Olschwang S et al. Genet. Test. 2007;11:315-20; Jones N et al. Gastroenterology. 2009 Aug;137:489-94, 494.e1; quiz 725-6; Vogt S et al. Gastroenterology. 2009 Dec;137:1975-85; Morak M et al. Clin Genet, 2010 Oct;78:353-63; Win AK et al. Gastroenterology. 2014 May;146:1208-11.e1-5; Papp J et al. Fam. Cancer. 2016 Jan;15:85-97; Kacerovska D et al. Am. J. Dermatopathol. 2016 Dec;38:915-92; Ricci MT et al. J Hum Genet, 2017 Feb;62:309-315; Viel A et al. EBioMedicine, 2017 Jun;20:39-49; Yanus GA et al. Clin. Genet. 2018 May;93:1015-1021; Sutcliffe EG et al. Fam Cancer, 2019 04;18:203-209; Staninova-Stojovska M et al. Balkan J Med Genet, 2019 Dec;22:5-16). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). Based on the majority of available evidence to date, this variant is likely to be pathogenic. -
Familial adenomatous polyposis 2 Uncertain:1
This sequence change replaces arginine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 245 of the MUTYH protein (p.Arg245Leu). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with adenomatous polyposis (PMID: 17081686). This variant is also known as R231L. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. Experimental studies have shown that this missense change affects MUTYH function (PMID: 17081686). This variant disrupts the p.Arg245 amino acid residue in MUTYH. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 16134147, 16557584, 19732775, 23108399, 24444654, 26446593). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. 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. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
No publications associated with this variant yet.