M-3350-T-C

Position:

• chrM-3350-T-C

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4 BP6_Moderate BS2

The ENST00000361390.2(MT-ND1):​c.44T>C​(p.Ile15Thr) variant causes a missense change. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency: Mitomap GenBank: 𝑓 0.00030 (AC: 20)
• Consequence: MT-ND1 ENST00000361390.2 missense
• Scores: Apogee2 Benign 0.22
• Clinical Significance: Benign criteria provided, single submitter B:1 No linked disesase in Mitomap
• Conservation: PhyloP100: 5.81

Genes affected

MT-ND1 (HGNC:7455): (mitochondrially encoded NADH dehydrogenase 1) Enables NADH dehydrogenase (ubiquinone) activity. Involved in mitochondrial electron transport, NADH to ubiquinone and mitochondrial respiratory chain complex I assembly. Located in mitochondrial membrane. Part of mitochondrial respiratory chain complex I. Implicated in several diseases, including MELAS syndrome; neurodegenerative disease (multiple); optic nerve disease (multiple); toxic shock syndrome; and type 2 diabetes mellitus. Biomarker of Alzheimer's disease; Parkinson's disease; and multiple sclerosis. [provided by Alliance of Genome Resources, Apr 2022]

MT-TL1 (HGNC:7490): (mitochondrially encoded tRNA leucine 1 (UUA/G)) Implicated in cardiomyopathy. [provided by Alliance of Genome Resources, Apr 2022]

TRNL1 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -7 ACMG points.

• BP4: Apogee2 supports a benign effect, 0.2217416 < 0.5 .
• BP6: Variant M-3350-T-C is Benign according to our data. Variant chrM-3350-T-C is described in ClinVar as [Benign]. Clinvar id is 692342.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High AC in GnomadMitoHomoplasmic at 21

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRNL1	TRNL1.1			downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MT-ND1	ENST00000361390.2	c.44T>C	p.Ile15Thr	missense_variant	1/1			P1
MT-TL1	ENST00000386347.1			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: 0.00030 AC: 20

Gnomad homoplasmic AF: 0.00037 AC: 21 AN: 56430

Gnomad heteroplasmic AF: 0.000018 AC: 1 AN: 56430

Alfa AF: 0.000445 Hom.: 2

Mitomap

No disease associated.

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Leigh syndrome Benign:1

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.3350T>C (YP_003024026.1:p.Ile15Thr) variant in MTND1 gene is interpretated to be a Benign variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes: BS1, BS4 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Apogee2	Benign	0.22
Hmtvar	Benign	0.15
AlphaMissense	Benign	0.27
BayesDel_addAF	Benign	-0.092	T
DEOGEN2	Benign	0.10	T
LIST_S2	Benign	0.48	T
MutationAssessor	Uncertain	2.2	M
MutationTaster	Benign	1.0	N
PROVEAN	Uncertain	-3.0	D
Sift4G	Uncertain	0.020	D
GERP RS		3.6
Varity_R		0.59

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1603218915; hg19: chrM-3351;