NM_006231.4:c.2468+10C>T
Variant summary
Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP6_Very_StrongBS1BS2
The NM_006231.4(POLE):c.2468+10C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000558 in 1,610,342 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).
Frequency
Consequence
NM_006231.4 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: 0.00311 AC: 472AN: 151970Hom.: 4 Cov.: 31
GnomAD3 exomes AF: 0.000755 AC: 189AN: 250492Hom.: 0 AF XY: 0.000510 AC XY: 69AN XY: 135410
GnomAD4 exome AF: 0.000288 AC: 420AN: 1458254Hom.: 2 Cov.: 31 AF XY: 0.000229 AC XY: 166AN XY: 724896
GnomAD4 genome AF: 0.00314 AC: 478AN: 152088Hom.: 4 Cov.: 31 AF XY: 0.00315 AC XY: 234AN XY: 74332
ClinVar
Submissions by phenotype
not specified Benign:4
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. -
Variant summary: POLE c.2468+10C>T alters a non-conserved 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 was observed with an allele frequency of 0.001 in 276194 control chromosomes (gnomAD), predominantly in the African cohort with an allele frequency of 0.012. The observed variant frequency within African control individuals in the gnomAD database is approximately 774-folds higher than the estimated maximal expected allele frequency for a pathogenic variant in POLE causing Colorectal Cancer phenotype (1.4e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African origin. To our knowledge, no occurrence of c.2468+10C>T in individuals affected with Colorectal Cancer and no experimental evidence demonstrating its impact on protein function have been reported. Four ClinVar submissions from clinical diagnostic laboratories (evaluation after 2014) cite the variant as "likely benign/benign." Based on the evidence outlined above, the variant was classified as benign. -
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Colorectal cancer, susceptibility to, 12 Benign:2
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not provided Benign:2
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Carcinoma of colon Benign:1
The POLE c.2468+10C>T variant was not identified in the literature. The variant was identified in dbSNP (ID: rs5744823) as "With other allele ", and in ClinVar database (classified as benign by Invitae and one clinical laboratory; as likely benign by Counsyl, GeneDx, and Prevention Genetics). The variant was identified in control databases in 284 of 276194 chromosomes at a frequency of 0.001 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: African in 263 of 24008 chromosomes (freq: 0.01), Other in 2 of 6436 chromosomes (freq: 0.0003), Latino in 19 of 34346 chromosomes (freq: 0.0006), while the variant was not observed in the European, Ashkenazi Jewish, East Asian, Finnish, and South Asian 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. -
POLE-related disorder Benign:1
This variant is classified as 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
This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
Colorectal cancer, susceptibility to, 12;C3554576:Facial dysmorphism-immunodeficiency-livedo-short stature syndrome;C5193036:Intrauterine growth retardation, metaphyseal dysplasia, adrenal hypoplasia congenita, genital anomalies, and immunodeficiency Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at