M-8387-G-T

Position:

• chrM-8387-G-T

Variant summary

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

The ENST00000361851.1(MT-ATP8):​c.22G>T​(p.Val8Leu) 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V8A) has been classified as Benign.

• Frequency: Mitomap GenBank: 𝑓 0.0 (AC: 0)
• Consequence: MT-ATP8 ENST00000361851.1 missense
• Scores: Apogee2 Benign 0.12
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 No linked disesase in Mitomap
• Conservation: PhyloP100: 1.39

Genes affected

ATP8 (HGNC:):

MT-ATP8 (HGNC:7415): (mitochondrially encoded ATP synthase 8) Contributes to proton-transporting ATP synthase activity, rotational mechanism. Involved in mitochondrial ATP synthesis coupled proton transport. Part of mitochondrial proton-transporting ATP synthase complex. Implicated in multiple sclerosis and urinary bladder cancer. [provided by Alliance of Genome Resources, Apr 2022]

MT-TK (HGNC:7489): (mitochondrially encoded tRNA lysine)

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, 0.12020703 < 0.5 .

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ATP8	ATP8.1	c.22G>T	p.Val8Leu	missense_variant	1/1		YP_003024030.1
TRNK	TRNK.1			downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MT-ATP8	ENST00000361851.1	c.22G>T	p.Val8Leu	missense_variant	1/1			ENSP00000355265	P1
MT-TK	ENST00000387421.1			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

Gnomad homoplasmic AF: 0.000035 AC: 2 AN: 56434

Gnomad heteroplasmic AF: 0.0 AC: 0 AN: 56434

Mitomap

No disease associated.

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Clinical Genetics Laboratory, Skane University Hospital Lund

Oct 06, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Apogee2	Benign	0.12
Hmtvar	Pathogenic	0.63
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.34	T
DEOGEN2	Benign	0.065	T
LIST_S2	Uncertain	0.96	D
MutationTaster	Benign	1.0	N
PROVEAN	Benign	-1.3	N
Sift	Uncertain	0.0080	D
Sift4G	Uncertain	0.0020	D
GERP RS		-4.7
Varity_R		0.51

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1556423439; hg19: chrM-8388;