M-4495-T-C

Position:

• chrM-4495-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The ENST00000361453.3(MT-ND2):​c.26T>C​(p.Ile9Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Mitomap GenBank: 𝑓 0.0 (AC: 0)
• Consequence: MT-ND2 ENST00000361453.3 missense
• Scores: Apogee2 Benign 0.20
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 No linked disesase in Mitomap
• Conservation: PhyloP100: 1.25

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]

MT-TM (HGNC:7492): (mitochondrially encoded tRNA methionine)

TRNM (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very low frequency in mitomap database: 0.0
• BP4: Apogee2 supports a benign effect, 0.20497778 < 0.5 .

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRNM	TRNM.1			downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MT-ND2	ENST00000361453.3	c.26T>C	p.Ile9Thr	missense_variant	1/1			P1
MT-TM	ENST00000387377.1			downstream_gene_variant

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: 0

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.4495T>C (YP_003024027.1:p.Ile9Thr) 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	0.20
Hmtvar	Pathogenic	0.73
AlphaMissense	Pathogenic	0.74
BayesDel_addAF	Benign	-0.13	T
DEOGEN2	Benign	0.097	T
LIST_S2	Uncertain	0.87	D
MutationAssessor	Benign	1.9	L
MutationTaster	Benign	1.0	N
PROVEAN	Uncertain	-4.3	D
Sift4G	Uncertain	0.045	D
GERP RS		4.3
Varity_R		0.12

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1603219480; hg19: chrM-4496;