M-4554-A-G

Position:

• chrM-4554-A-G

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4 BS2

The ENST00000361453.3(MT-ND2):​c.85A>G​(p.Thr29Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 8/11 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Mitomap GenBank: 𝑓 0.0 (AC: 3)
• Consequence: MT-ND2 ENST00000361453.3 missense
• Scores: Apogee2 Benign 0.024
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 No linked disesase in Mitomap
• Conservation: PhyloP100: 1.40

Genes affected

MT-ND2 (HGNC:7456): (mitochondrially encoded NADH dehydrogenase 2) Enables NADH dehydrogenase (ubiquinone) activity. Involved in mitochondrial electron transport, NADH to ubiquinone and mitochondrial respiratory chain complex I assembly. Part of mitochondrial respiratory chain complex I. Implicated in Leber hereditary optic neuropathy; multiple sclerosis; myocardial infarction; neurodegenerative disease (multiple); and urinary bladder cancer. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very low frequency in mitomap database: 0.0
• BP4: Apogee2 supports a benign effect, 0.02359688 < 0.5 .
• BS2: High AC in GnomadMitoHomoplasmic at 4

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MT-ND2	ENST00000361453.3	c.85A>G	p.Thr29Ala	missense_variant	1/1			P1

Frequencies

GnomAD4 exome Cov.: 0

We have no GnomAD4 genomes data on this position. Probably position not covered by the project.

Mitomap GenBank AF: 0.0 AC: 3

Gnomad homoplasmic AF: 0.000071 AC: 4 AN: 56433

Gnomad heteroplasmic AF: 0.0 AC: 0 AN: 56433

Alfa AF: 0.000229 Hom.: 1

Mitomap

No disease associated.

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Leigh syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Wong Mito Lab, Molecular and Human Genetics, Baylor College of Medicine

Oct 17, 2019

The NC_012920.1:m.4554A>G (YP_003024027.1:p.Thr29Ala) variant in MTND2 gene is interpretated to be a Uncertain Significance variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes: BP4 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Apogee2	Benign	0.024
Hmtvar	Benign	0.10
AlphaMissense	Benign	0.096
BayesDel_addAF	Benign	-0.64	T
DEOGEN2	Benign	0.0089	T
LIST_S2	Benign	0.41	T
MutationAssessor	Benign	-1.7	N
MutationTaster	Benign	1.0	N
PROVEAN	Benign	-0.080	N
Sift4G	Benign	1.0	T
GERP RS		-9.1
Varity_R		0.095

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1603219508; hg19: chrM-4555;