chrM-8550-A-G

Position:

• chrM-8550-A-G

Variant summary

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

The ENST00000361851.1(MT-ATP8):​c.185A>G​(p.His62Arg) 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 (★). Synonymous variant affecting the same amino acid position (i.e. H62H) has been classified as Likely benign.

• Frequency: Mitomap GenBank: 𝑓 0.0 (AC: 0)
• Consequence: MT-ATP8 ENST00000361851.1 missense
• Scores: Apogee2 Benign 0.17
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 No linked disesase in Mitomap
• Conservation: PhyloP100: 0.260

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-ATP6 (HGNC:7414): (mitochondrially encoded ATP synthase 6) 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 Leber hereditary optic neuropathy; NARP syndrome; Parkinson's disease; multiple sclerosis; and systemic lupus erythematosus. [provided by Alliance of Genome Resources, Apr 2022]

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, 0.17140318 < 0.5 .

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ATP8	ATP8.1	c.185A>G	p.His62Arg	missense_variant	1/1		YP_003024030.1
ATP6	ATP6.1	c.24A>G	p.Ser8=	synonymous_variant	1/1		YP_003024031.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MT-ATP8	ENST00000361851.1	c.185A>G	p.His62Arg	missense_variant	1/1			ENSP00000355265	P1
MT-ATP6	ENST00000361899.2	c.24A>G	p.Ser8=	synonymous_variant	1/1			ENSP00000354632	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: 0

Gnomad homoplasmic AF: 0.0 AC: 0 AN: 56433

Gnomad heteroplasmic AF: 0.000018 AC: 1 AN: 56433

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.8550A>G (YP_003024030.1:p.His62Arg) variant in MTATP8 gene is interpretated to be a Uncertain Significance variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes: PP6, PP7 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Apogee2	Benign	0.17
Hmtvar	Pathogenic	0.62
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.33	T
DEOGEN2	Benign	0.045	T
LIST_S2	Uncertain	0.93	D
MutationTaster	Benign	1.0	D;N
PROVEAN	Benign	-1.9	N
Sift	Benign	0.057	T
Sift4G	Benign	0.27	T
GERP RS		-5.1
Varity_R		0.094

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1603221581; hg19: chrM-8551;