M-8396-A-G

Variant names:

• chrM-8396-A-G
• rs1603221454
• unassigned_transcript_4804:c.31A>G

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP6_Moderate BS2

In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency: Mitomap GenBank: 𝑓 0.0017 (AC: 103)
• Consequence: ATP8 missense
• Scores: Apogee2 Benign 0.11
• Clinical Significance: Benign criteria provided, single submitter B:1 No linked disesase in Mitomap
• Conservation: PhyloP100: -0.605

Genes affected

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]

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]

COX2 (HGNC:7421): (mitochondrially encoded cytochrome c oxidase II) Contributes to cytochrome-c oxidase activity. Predicted to be involved in mitochondrial electron transport, cytochrome c to oxygen and positive regulation of vasoconstriction. Located in mitochondrial inner membrane. Part of respiratory chain complex IV. Biomarker of Huntington's disease and stomach cancer. [provided by Alliance of Genome Resources, Apr 2022]

TRNK (HGNC:7489): (mitochondrially encoded tRNA lysine)

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• BP6: Variant M-8396-A-G is Benign according to our data. Variant chrM-8396-A-G is described in ClinVar as [Benign]. Clinvar id is 692842.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High AC in GnomadMitoHomoplasmic at 37

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATP8	unassigned_transcript_4804	c.31A>G	p.Thr11Ala	missense_variant	Exon 1 of 1
ATP6	unassigned_transcript_4805	c.-131A>G		upstream_gene_variant
COX2	unassigned_transcript_4802	c.*127A>G		downstream_gene_variant
TRNK	unassigned_transcript_4803	c.*32A>G		downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt

Frequencies

GnomAD4 exome Cov.: 0

We have no GnomAD4 genomes data on this position. Probably position not covered by the project.

Mitomap GenBank AF: 0.0017 AC: 103

Gnomad homoplasmic AF: 0.00066 AC: 37 AN: 56433

Gnomad heteroplasmic AF: 0.0 AC: 0 AN: 56433

Alfa AF: 0.000223 Hom.: 1

Mitomap

No disease associated.

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Leigh syndrome Benign:1

Oct 17, 2019

Wong Mito Lab, Molecular and Human Genetics, Baylor College of Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The NC_012920.1:m.8396A>G (YP_003024030.1:p.Thr11Ala) variant in MTATP8 gene is interpretated to be a Benign variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes: BS1, BS2 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Apogee2	Benign	0.11
Hmtvar	Pathogenic	0.67
AlphaMissense	Benign	0.066
BayesDel_addAF	Benign	-0.40	T
DEOGEN2	Benign	0.037	T
LIST_S2	Benign	0.50	T
PROVEAN	Benign	-1.9	N
Sift	Benign	0.048	D
Sift4G	Uncertain	0.024	D
GERP RS		1.7
Varity_R		0.28

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1603221454; hg19: chrM-8397;