5-112835175-G-T
Variant summary
Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2
The NM_000038.6(APC):c.1958+10G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000175 in 1,602,012 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
Consequence
NM_000038.6 intron
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -16 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000854 AC: 13AN: 152172Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.000425 AC: 102AN: 239856Hom.: 1 AF XY: 0.000431 AC XY: 56AN XY: 129804
GnomAD4 exome AF: 0.000185 AC: 268AN: 1449840Hom.: 0 Cov.: 28 AF XY: 0.000172 AC XY: 124AN XY: 721504
GnomAD4 genome AF: 0.0000854 AC: 13AN: 152172Hom.: 0 Cov.: 32 AF XY: 0.0000673 AC XY: 5AN XY: 74344
ClinVar
Submissions by phenotype
not specified Benign:3
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. -
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Variant summary: APC c.1958+10G>T alters a nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 5/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.00043 in 239856 control chromosomes in the gnomAD database, including 1 homozygotes. The observed variant frequency is approximately 5.95 fold of the estimated maximal expected allele frequency for a pathogenic variant in APC causing Familial Adenomatous Polyposis phenotype (7.1e-05), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.1958+10G>T in individuals affected with Familial Adenomatous Polyposis and no experimental evidence demonstrating its impact on protein function have been reported. Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign. -
Familial adenomatous polyposis 1 Benign:3
This variant is considered likely benign. This variant is intronic and is not expected to impact mRNA splicing. -
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APC-Associated Polyposis Disorders Benign:1
This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -
APC-related disorder Benign:1
This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Hereditary cancer-predisposing syndrome Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at