rs781569222
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Variant summary
Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_StrongBP6_Very_Strong
The NM_000249.4(MLH1):c.545+10A>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000572 in 1,573,094 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 Likely benign (★★).
Frequency
Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0000056 ( 0 hom. )
Consequence
MLH1
NM_000249.4 intron
NM_000249.4 intron
Scores
2
Clinical Significance
Conservation
PhyloP100: 0.0430
Genes affected
MLH1 (HGNC:7127): (mutL homolog 1) The protein encoded by this gene can heterodimerize with mismatch repair endonuclease PMS2 to form MutL alpha, part of the DNA mismatch repair system. When MutL alpha is bound by MutS beta and some accessory proteins, the PMS2 subunit of MutL alpha introduces a single-strand break near DNA mismatches, providing an entry point for exonuclease degradation. The encoded protein is also involved in DNA damage signaling and can heterodimerize with DNA mismatch repair protein MLH3 to form MutL gamma, which is involved in meiosis. This gene was identified as a locus frequently mutated in hereditary nonpolyposis colon cancer (HNPCC). [provided by RefSeq, Aug 2017]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -12 ACMG points.
BP4
?
Computational evidence support a benign effect (BayesDel_noAF=-0.65).
BP6
?
Variant 3-37008915-A-C is Benign according to our data. Variant chr3-37008915-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 385256.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MLH1 | NM_000249.4 | c.545+10A>C | intron_variant | ENST00000231790.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MLH1 | ENST00000231790.8 | c.545+10A>C | intron_variant | 1 | NM_000249.4 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152240Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.0000119 AC: 3AN: 251414Hom.: 0 AF XY: 0.0000221 AC XY: 3AN XY: 135892
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GnomAD4 exome AF: 0.00000563 AC: 8AN: 1420854Hom.: 0 Cov.: 26 AF XY: 0.00000564 AC XY: 4AN XY: 709398
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ClinVar
Significance: Benign/Likely benign
Submissions summary: Benign:5
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not specified Benign:1
Likely benign, criteria provided, single submitter | clinical testing | GeneDx | Aug 17, 2017 | 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. - |
Colorectal cancer, hereditary nonpolyposis, type 2 Benign:1
Benign, criteria provided, single submitter | clinical testing | Myriad Genetics, Inc. | Apr 26, 2024 | This variant is considered benign. This variant is intronic and is not expected to impact mRNA splicing. This variant has been observed in trans with a known pathogenic variant in one or more individuals lacking clinical features consistent with gene-specific recessive disease. - |
Hereditary nonpolyposis colorectal neoplasms Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Invitae | Oct 23, 2023 | - - |
Malignant tumor of breast Benign:1
Likely benign, no assertion criteria provided | clinical testing | Department of Pathology and Laboratory Medicine, Sinai Health System | - | The MLH1 c.545+10A>C variant was not identified in the literature nor was it identified in the UMD-LSDB database. The variant was identified in dbSNP (ID: rs781569222) as "With Likely benign allele" and ClinVar (classified as likely benign by GeneDx and Color). The variant was identified in control databases in 3 of 246208 chromosomes at a frequency of 0.00001 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the South Asian population in 3 of 30782 chromosomes (freq: 0.0001), while the variant was not observed in the African, Other, Latino, European, Ashkenazi Jewish, East Asian, or Finnish populations. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. - |
Hereditary cancer-predisposing syndrome Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Dec 07, 2016 | - - |
Computational scores
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Benign
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Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at