NM_015450.3(POT1):c.763A>C (p.Asn255His) AND Tumor predisposition syndrome 3

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Nov 17, 2023
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000652223.9

Allele description [Variation Report for NM_015450.3(POT1):c.763A>C (p.Asn255His)]

NM_015450.3(POT1):c.763A>C (p.Asn255His)

Gene:

POT1:protection of telomeres 1 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

7q31.33

Genomic location:

Preferred name:

NM_015450.3(POT1):c.763A>C (p.Asn255His)

HGVS:

NC_000007.14:g.124853078T>G
NG_029232.1:g.81906A>C
NM_001042594.2:c.370A>C
NM_015450.3:c.763A>CMANE SELECT
NP_001036059.1:p.Asn124His
NP_056265.2:p.Asn255His
NC_000007.13:g.124493132T>G
NM_015450.2:c.763A>C
NR_003102.2:n.1206A>C
NR_003103.2:n.1206A>C
NR_003104.2:n.1206A>C

Protein change:

N124H

Links:

dbSNP: rs1260902476

NCBI 1000 Genomes Browser:

rs1260902476

Molecular consequence:

NM_001042594.2:c.370A>C - missense variant - [Sequence Ontology: SO:0001583]
NM_015450.3:c.763A>C - missense variant - [Sequence Ontology: SO:0001583]
NR_003102.2:n.1206A>C - non-coding transcript variant - [Sequence Ontology: SO:0001619]
NR_003103.2:n.1206A>C - non-coding transcript variant - [Sequence Ontology: SO:0001619]
NR_003104.2:n.1206A>C - non-coding transcript variant - [Sequence Ontology: SO:0001619]

Condition(s)

Name:: Tumor predisposition syndrome 3
Synonyms:: Melanoma, cutaneous malignant, susceptibility to, 10; LONG TELOMERE SYNDROME, POT1-RELATED
Identifiers:: MONDO: MONDO:0014368; MedGen: C4014476; Orphanet: 618; OMIM: 615848

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000774091	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Nov 17, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000774091

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Nov 17, 2023)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240-242.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Invitae, SCV000774091.8

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

This sequence change replaces asparagine, which is neutral and polar, with histidine, which is basic and polar, at codon 255 of the POT1 protein (p.Asn255His). This variant is present in population databases (no rsID available, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with POT1-related conditions. ClinVar contains an entry for this variant (Variation ID: 541879). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt POT1 protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Mar 5, 2024

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