NM_007215.4(POLG2):c.1262T>C (p.Met421Thr) AND not provided

Germline classification:: Uncertain significance (2 submissions)
Last evaluated:: Jan 22, 2024
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

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:: RCV002041751.6

Allele description [Variation Report for NM_007215.4(POLG2):c.1262T>C (p.Met421Thr)]

NM_007215.4(POLG2):c.1262T>C (p.Met421Thr)

Genes:

POLG2:DNA polymerase gamma 2, accessory subunit [Gene - OMIM - HGNC]
MILR1:mast cell immunoglobulin like receptor 1 [Gene - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

17q23.3

Genomic location:

Preferred name:

NM_007215.4(POLG2):c.1262T>C (p.Met421Thr)

HGVS:

NC_000017.11:g.64480319A>G
NG_013029.1:g.21749T>C
NM_007215.3:c.1262T>C
NM_007215.4:c.1262T>CMANE SELECT
NP_009146.2:p.Met421Thr
NC_000017.10:g.62476436A>G

Protein change:

M421T

Links:

dbSNP: rs782170612

NCBI 1000 Genomes Browser:

rs782170612

Molecular consequence:

NM_007215.4:c.1262T>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Synonyms:: none provided
Identifiers:: MedGen: C3661900

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV002111956	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Jan 22, 2024)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV004040168	GeneDx	criteria provided, single submitter (GeneDx Variant Classification Process June 2021)	Uncertain significance (Mar 27, 2023)	germline	clinical testing	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV002111956

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Jan 22, 2024)

germline

clinical testing

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

SCV004040168

GeneDx

criteria provided, single submitter

(GeneDx Variant Classification Process June 2021)

Uncertain significance
(Mar 27, 2023)

germline

clinical testing

Citation Link

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	yes	not provided	not provided	not provided	not provided	not provided	clinical testing
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, SCV002111956.3

#	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 methionine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 421 of the POLG2 protein (p.Met421Thr). This variant is present in population databases (rs782170612, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with POLG2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1347542). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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

From GeneDx, SCV004040168.1

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

Description

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge

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

Last Updated: Mar 5, 2024

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