rs368303888
Variant summary
Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2
The NM_006231.4(POLE):c.1405C>T(p.Leu469Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000973 in 1,613,634 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. L469L) has been classified as Likely benign.
Frequency
Consequence
NM_006231.4 synonymous
Scores
Clinical Significance
Conservation
Publications
- POLE-related polyposis and colorectal cancer syndromeInheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
- colorectal cancer, susceptibility to, 12Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics
- facial dysmorphism-immunodeficiency-livedo-short stature syndromeInheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
- intrauterine growth retardation, metaphyseal dysplasia, adrenal hypoplasia congenita, genital anomalies, and immunodeficiencyInheritance: AR Classification: STRONG Submitted by: G2P
- IMAGe syndromeInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- Polymerase proofreading-related adenomatous polyposisInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
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ACMG classification
Our verdict: Benign. The variant received -19 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| POLE | NM_006231.4 | c.1405C>T | p.Leu469Leu | synonymous_variant | Exon 14 of 49 | ENST00000320574.10 | NP_006222.2 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| POLE | ENST00000320574.10 | c.1405C>T | p.Leu469Leu | synonymous_variant | Exon 14 of 49 | 1 | NM_006231.4 | ENSP00000322570.5 |
Frequencies
GnomAD3 genomes AF: 0.000112 AC: 17AN: 152268Hom.: 0 Cov.: 33 show subpopulations
GnomAD2 exomes AF: 0.000139 AC: 35AN: 251488 AF XY: 0.000118 show subpopulations
GnomAD4 exome AF: 0.0000958 AC: 140AN: 1461366Hom.: 3 Cov.: 31 AF XY: 0.0000757 AC XY: 55AN XY: 727026 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.000112 AC: 17AN: 152268Hom.: 0 Cov.: 33 AF XY: 0.0000806 AC XY: 6AN XY: 74396 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not provided Benign:5
POLE: BP4, BP7
This variant is associated with the following publications: (PMID: 28776572)
not specified Benign:2
Colorectal cancer, susceptibility to, 12 Benign:2
This variant is considered benign. This variant is a silent/synonymous amino acid change and it is not expected to impact splicing.
Hereditary cancer-predisposing syndrome Benign:2
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.
Polymerase proofreading-related adenomatous polyposis Benign:1
The POLE p.Leu469= variant was not identified in the literature. The variant was identified in dbSNP (ID: rs368303888) as “With Likely benign, Uncertain significance allele” (a C>G substitution at this position has also been observed), in ClinVar (classified as benign by Invitae and Quest Diagnostics; and as likely benign by GeneDx, Ambry Genetics and Prevention Genetics). The variant was identified in control databases in 39 of 277232 chromosomes at a frequency of 0.0001 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: Other in 5 of 6468 chromosomes (freq: 0.0008), Latino in 3 of 34420 chromosomes (freq: 0.00009), European Non-Finnish in 1 of 126718 chromosomes (freq: 0.000008), East Asian in 30 of 18870 chromosomes (freq: 0.002), while the variant was not observed in the African, Ashkenazi Jewish, Finnish, and South Asian populations. The p.Leu469= 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) do not predict a difference in splicing. The nucleotide is not highly conserved and a C>T substitution has been observed in at least 2 mammalian species. 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.
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at