NM_006231.4:c.2510T>C
Variant summary
Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBP6
The NM_006231.4(POLE):c.2510T>C(p.Phe837Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000238 in 1,613,958 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. F837C) has been classified as Uncertain significance.
Frequency
Consequence
NM_006231.4 missense
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: Likely_benign. The variant received -5 ACMG points.
Variant Effect in Transcripts
ACMG analysis was done for transcript: NM_006231.4. You can select a different transcript below to see updated ACMG assignments.
RefSeq Transcripts
| Selected | Gene | Transcript | Tags | HGVSc | HGVSp | Effect | Exon Rank | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| POLE | NM_006231.4 | MANE Select | c.2510T>C | p.Phe837Ser | missense | Exon 22 of 49 | NP_006222.2 |
Ensembl Transcripts
| Selected | Gene | Transcript | Tags | HGVSc | HGVSp | Effect | Exon Rank | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| POLE | ENST00000320574.10 | TSL:1 MANE Select | c.2510T>C | p.Phe837Ser | missense | Exon 22 of 49 | ENSP00000322570.5 | ||
| POLE | ENST00000535270.5 | TSL:1 | c.2429T>C | p.Phe810Ser | missense | Exon 21 of 48 | ENSP00000445753.1 | ||
| POLE | ENST00000537064.5 | TSL:1 | n.*1557T>C | non_coding_transcript_exon | Exon 22 of 49 | ENSP00000442578.1 |
Frequencies
GnomAD3 genomes AF: 0.000191 AC: 29AN: 152150Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.000278 AC: 70AN: 251382 AF XY: 0.000258 show subpopulations
GnomAD4 exome AF: 0.000243 AC: 355AN: 1461808Hom.: 1 Cov.: 32 AF XY: 0.000231 AC XY: 168AN XY: 727214 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.000191 AC: 29AN: 152150Hom.: 0 Cov.: 32 AF XY: 0.000135 AC XY: 10AN XY: 74308 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not specified Uncertain:3
DNA sequence analysis of the POLE gene demonstrated a sequence change, c.2510T>C, in exon 22 that results in an amino acid change, p.Phe837Ser. This sequence change does not appear to have been previously described in patients with POLE-related disorders and has been described in the gnomAD database with a frequency of 0.45% in the Ashkenazi Jewish sub-population (dbSNP rs139182500). The p.Phe837Ser change affects a moderately conserved amino acid residue located in a domain of the POLE protein that is known to be functional. In-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL) provide contradictory results for the p.Phe837Ser substitution. Due to these contrasting evidences and the lack of functional studies, the clinical significance of the p.Phe837Ser change remains unknown at this time.
Hereditary cancer-predisposing syndrome Uncertain:1Benign:1
The p.F837S variant (also known as c.2510T>C), located in coding exon 22 of the POLE gene, results from a T to C substitution at nucleotide position 2510. The phenylalanine at codon 837 is replaced by serine, an amino acid with highly dissimilar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear.
not provided Benign:2
In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Observed in an individual with advanced cancer (Mandelker 2017); This variant is associated with the following publications: (PMID: 28873162, 29338072)
Colorectal cancer, susceptibility to, 12 Uncertain:1
Malignant tumor of breast Uncertain:1
The POLE p.Phe837Ser variant was identified in 1 of 2080 proband chromosomes (frequency: 0.0005) from an individual with an unspecified cancer (Mandelker 2017). The variant was identified in dbSNP (rs139182500) as “with uncertain significance allele” and ClinVar (interpreted as "uncertain signficance" by Ambry Genetics and 2 others and "likely benign" by Invitae). The variant was identified in control databases in 72 of 277,116 chromosomes at a frequency of 0.0003 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: Other in 3 of 6462 chromosomes (freq: 0.0005), Latino in 10 of 34,420 chromosomes (freq: 0.0003), European in 16 of 126,680 chromosomes (freq: 0.0001), Ashkenazi Jewish in 43 of 10,150 chromosomes (freq: 0.004); it was not observed in the African, East Asian, Finnish, and South Asian populations. The p.Phe837 residue is conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein; this information is not very predictive of pathogenicity. 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. This variant is classified as a variant of uncertain significance.
Facial dysmorphism-immunodeficiency-livedo-short stature syndrome Uncertain:1
This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868].
POLE-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).
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at