rs1057518882

Positions:

• chrM-14598-T-C

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM5 BP4 BS2

The ENST00000361681.2(MT-ND6):​c.76A>G​(p.Ile26Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 7/11 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I26T) has been classified as Likely pathogenic.

• Frequency: Mitomap GenBank: 𝑓 0.00010 (AC: 7)
• Consequence: MT-ND6 ENST00000361681.2 missense
• Scores: Apogee2 Benign 0.050
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1 B:1 PD-/-LS
• Conservation: PhyloP100: 0.263

Genes affected

MT-ND6 (HGNC:7462): (mitochondrially encoded NADH dehydrogenase 6) Enables NADH dehydrogenase (ubiquinone) activity. Involved in mitochondrial electron transport, NADH to ubiquinone and mitochondrial respiratory chain complex I assembly. Predicted to be located in mitochondrial inner membrane. Implicated in Leber hereditary optic neuropathy; Leigh disease; and spinal muscular atrophy with lower extremity predominante 2B. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM5: Other missense variant is known to change same aminoacid residue: Variant chrM-14597-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 209173.Status of the report is reviewed_by_expert_panel, 3 stars.
• BP4: Apogee2 supports a benign effect, 0.04986216 < 0.5 .
• BS2: High AC in GnomadMitoHomoplasmic at 9

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MT-ND6	ENST00000361681.2	c.76A>G	p.Ile26Val	missense_variant	1/1			ENSP00000354665	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: 0.00010 AC: 7

Gnomad homoplasmic AF: 0.00016 AC: 9 AN: 56425

Gnomad heteroplasmic AF: 0.000053 AC: 3 AN: 56425

Alfa AF: 0.000223 Hom.: 1

Mitomap

PD-/-LS

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Parkinsonian disorder;C0456909:Blindness Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Centre for Mendelian Genomics, University Medical Centre Ljubljana

Jul 15, 2015

- -

Leigh syndrome Benign:1

Likely benign, 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.14598T>C (YP_003024037.1:p.Ile26Val) variant in MTND6 gene is interpretated to be a Likely Benign variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes: BS4, BP6 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Apogee2	Benign	0.050
Hmtvar	Pathogenic	0.68
AlphaMissense	Benign	0.091
BayesDel_addAF	Benign	-0.58	T
DEOGEN2	Benign	0.22	T
LIST_S2	Benign	0.67	T
MutationAssessor	Benign	0.98	L
MutationTaster	Benign	1.0	D
PROVEAN	Benign	-0.62	N
Sift	Uncertain	0.011	D
Sift4G	Benign	0.39	T
GERP RS		-0.56
Varity_R		0.40

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1057518882; hg19: chrM-14599; COSMIC: COSV62378546; COSMIC: COSV62378546;