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NM_004614.4(TK2):c.-216G>A AND Mitochondrial DNA depletion syndrome, myopathic form

Germline classification:
Likely benign (1 submission)
Last evaluated:
Jan 13, 2018
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:
RCV000290866.14

Allele description [Variation Report for NM_004614.4(TK2):c.-216G>A]

NM_004614.4(TK2):c.-216G>A

Gene:
TK2:thymidine kinase 2 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
16q21
Genomic location:
Preferred name:
NM_004614.4(TK2):c.-216G>A
HGVS:
  • NC_000016.10:g.66550277C>T
  • NG_016862.1:g.5136G>A
  • NM_001172643.1:c.7G>A
  • NM_001172644.1:c.-216G>A
  • NM_001172645.1:c.-216G>A
  • NM_001271934.1:c.-458G>A
  • NM_001271935.1:c.7G>A
  • NM_004614.4:c.-216G>A
  • NP_001166114.1:p.Ala3Thr
  • NP_001258864.1:p.Ala3Thr
  • NC_000016.9:g.66584180C>T
  • NR_073520.1:n.136G>A
Protein change:
A3T
Links:
dbSNP: rs190131543
NCBI 1000 Genomes Browser:
rs190131543
Molecular consequence:
  • NM_001172643.1:c.7G>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001271935.1:c.7G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Mitochondrial DNA depletion syndrome, myopathic form (MTDPS2)
Synonyms:
MITOCHONDRIAL DNA DEPLETION SYNDROME 2 (MYOPATHIC TYPE); MITOCHONDRIAL DNA DEPLETION MYOPATHY, TK2-RELATED; Mitochondrial DNA depletion syndrome 2; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0012301; MedGen: C3149750; Orphanet: 254875; OMIM: 609560

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Assertion and evidence details

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Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV000398432Illumina Laboratory Services, Illumina
criteria provided, single submitter

(ICSL Variant Classification Criteria 13 December 2019)		Likely benign
(Jan 13, 2018) 		germlineclinical testing

Citation Link

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Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing

Details of each submission

From Illumina Laboratory Services, Illumina, SCV000398432.3

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testingnot provided

Description

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Nov 10, 2024