rs11146986
Variant summary
Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1
The NM_006231.4(POLE):c.5334C>T(p.Ala1778Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00274 in 1,613,910 control chromosomes in the GnomAD database, including 161 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).
Frequency
Consequence
NM_006231.4 synonymous
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -21 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.00300 AC: 456AN: 152176Hom.: 11 Cov.: 32
GnomAD3 exomes AF: 0.00614 AC: 1541AN: 251010Hom.: 52 AF XY: 0.00586 AC XY: 795AN XY: 135728
GnomAD4 exome AF: 0.00272 AC: 3969AN: 1461616Hom.: 150 Cov.: 31 AF XY: 0.00274 AC XY: 1991AN XY: 727126
GnomAD4 genome AF: 0.00297 AC: 453AN: 152294Hom.: 11 Cov.: 32 AF XY: 0.00353 AC XY: 263AN XY: 74460
ClinVar
Submissions by phenotype
not specified Benign:6
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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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not provided Benign:3
Variant summary: The POLE c.5334C>T (p.Ala1778Ala) variant involves the alteration of a non-conserved nucleotide causing a synonymous change and 5/5 splice prediction tools predict no significant impact on normal splicing. ESE finder predicts that this variant may alter ESE binding. However, these predictions have yet to be confirmed by functional studies. This variant was found in 760/120604 control chromosomes (23 homozygotes), predominantly in the East Asian cohort at a frequency of 0.079643 (687/8626). This frequency is about 5607 times the estimated maximal expected allele frequency of a pathogenic POLE variant (0.0000142), suggesting this is likely a benign polymorphism found primarily in population(s) of East Asian origin. In addition, multiple clinical diagnostic laboratories classified this variant as benign. Taken together, this variant is classified as benign. -
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Hereditary cancer-predisposing syndrome Benign:3
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This alteration is classified as 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 Benign:1
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Endometrial carcinoma Benign:1
The POLE p.Ala1778= variant was identified in the literature however the frequency of this variant in an affected population was not provided (Yamaguchi_2016_27217144). The variant was also identified in dbSNP (ID: rs11146986) as “With Benign allele”, ClinVar and Clinvitae (5x as benign by GeneDx, Invitae, Quest Diagnostics, Ambry Genetics, Laboratory Corrporation of America), databases. The variant was not identified in Cosmic and MutDB databases. The variant was identified in control databases in 1594 of 276784 chromosomes (51 homozygous) at a frequency of 0.006 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). Breakdown of the observations by population include African in 6 of 24018 chromosomes (freq: 0.00025), “Other” in 13 of 6462 chromosomes (freq: 0.002), Latino in 3 of 34420 chromosomes (freq: 0.000087), European Non-Finnish in 14 of 126618 chromosomes (freq: 0.00011), East Asian in 1453 of 18856 chromosomes (freq: 0.08), and South Asian in 105 of 30778 chromosomes (freq: 0.003412), while the variant was not observed in the Ashkenazi Jewish and European Finnish populations. The p.Ala1778Ala variant is not expected to have clinical significance because it does not result in a change of amino acid and is not located in a known consensus splice site. In addition, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. In summary, based on the above information this variant meets our laboratory's criteria to be classified as benign. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at