NM_003849.3(SUCLG1):c.338C>G (p.Ala113Gly) AND Mitochondrial DNA depletion syndrome 9 (encephalomyopathic with methylmalonic aciduria)

Clinical significance:Uncertain significance (Last evaluated: May 22, 2018)

Review status:1 star out of maximum of 4 stars

criteria provided, single submitter

Based on:
1 submission [Details]
Record status:

Allele description [Variation Report for NM_003849.3(SUCLG1):c.338C>G (p.Ala113Gly)]

NM_003849.3(SUCLG1):c.338C>G (p.Ala113Gly)

SUCLG1:succinate-CoA ligase alpha subunit [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
Genomic location:
Preferred name:
NM_003849.3(SUCLG1):c.338C>G (p.Ala113Gly)
  • NC_000002.12:g.84441440G>C
  • NG_016755.1:g.23023C>G
  • NM_003849.3:c.338C>G
  • NP_003840.2:p.Ala113Gly
  • NC_000002.11:g.84668564G>C
Protein change:
Molecular consequence:
  • NM_003849.3:c.338C>G - missense variant - [Sequence Ontology: SO:0001583]


Mitochondrial DNA depletion syndrome 9 (encephalomyopathic with methylmalonic aciduria) (MTDPS9)
MedGen: C3151476; Orphanet: 17; OMIM: 245400

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Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
SCV000814635Invitaecriteria provided, single submitter
Uncertain significance
(May 22, 2018)
germlineclinical testing

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

Summary from all submissions

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



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.

PubMed [citation]

Details of each submission

From Invitae, SCV000814635.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (1)


This sequence change replaces alanine with glycine at codon 113 of the SUCLG1 protein (p.Ala113Gly). The alanine residue is highly conserved and there is a small physicochemical difference between alanine and glycine. This variant is present in population databases (rs200123223, ExAC 0.006%). This variant has not been reported in the literature in individuals with SUCLG1-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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.

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

Last Updated: Mar 30, 2019

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