rs1401947646
Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The NM_006231.4(POLE):c.689T>G(p.Ile230Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,166 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I230V) has been classified as Uncertain significance.
Frequency
Consequence
NM_006231.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 2 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
POLE | NM_006231.4 | c.689T>G | p.Ile230Ser | missense_variant | 7/49 | ENST00000320574.10 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
POLE | ENST00000320574.10 | c.689T>G | p.Ile230Ser | missense_variant | 7/49 | 1 | NM_006231.4 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152166Hom.: 0 Cov.: 32
GnomAD4 exome Cov.: 32
GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152166Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 74334
ClinVar
Submissions by phenotype
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jun 06, 2019 | This sequence change replaces isoleucine with serine at codon 230 of the POLE protein (p.Ile230Ser). The isoleucine residue is weakly conserved and there is a large physicochemical difference between isoleucine and serine. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a POLE-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may alter RNA splicing, but this prediction has not been confirmed by published transcriptional studies. In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jun 30, 2021 | The p.I230S variant (also known as c.689T>G), located in coding exon 7 of the POLE gene, results from a T to G substitution at nucleotide position 689. The isoleucine at codon 230 is replaced by serine, an amino acid with dissimilar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at