chrM-8994-G-A

Variant names:

• chrM-8994-G-A
• rs28358887
• ENST00000361899.2:c.468G>A

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP6_Moderate BP7 BA1

The ENST00000361899.2(MT-ATP6):​c.468G>A​(p.Leu156Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Mitomap GenBank: 𝑓 0.017 (AC: 1028)
• Consequence: MT-ATP6 ENST00000361899.2 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1 No linked disesase in Mitomap
• Conservation: PhyloP100: -1.44
• Publications: 15 publications found

Genes affected

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]

MT-CO3 (HGNC:7422): (mitochondrially encoded cytochrome c oxidase III) Predicted to enable electron transfer activity and oxidoreduction-driven active transmembrane transporter activity. Involved in respiratory chain complex IV assembly. Part of respiratory chain complex IV. Implicated in MELAS syndrome. [provided by Alliance of Genome Resources, Apr 2022]

MT-CO3 Gene-Disease associations (from GenCC):

• mitochondrial disease

  Inheritance: Mitochondrial Classification: DEFINITIVE Submitted by: ClinGen
• hereditary recurrent myoglobinuria

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• cytochrome-c oxidase deficiency disease

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Leber hereditary optic neuropathy

  Inheritance: Mitochondrial Classification: SUPPORTIVE Submitted by: Orphanet
• Leigh syndrome

  Inheritance: Mitochondrial Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Benign. The variant received -11 ACMG points.

• BP6: Variant M-8994-G-A is Benign according to our data. Variant chrM-8994-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 3911661.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-1.44 with no splicing effect.
• BA1: High frequency in mitomap database: 0.0168

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATP6	unassigned_transcript_4805	c.468G>A	p.Leu156Leu	synonymous_variant	Exon 1 of 1
COX3	unassigned_transcript_4806	c.-213G>A		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MT-ATP6	ENST00000361899.2	c.468G>A	p.Leu156Leu	synonymous_variant	Exon 1 of 1	6		ENSP00000354632.2
MT-CO3	ENST00000362079.2	c.-213G>A		upstream_gene_variant		6		ENSP00000354982.2

Frequencies

Mitomap GenBank AF: 0.017 AC: 1028

Gnomad homoplasmic AF: 0.017 AC: 934 AN: 56412

Gnomad heteroplasmic AF: 0.00021 AC: 12 AN: 56412

Alfa AF: 0.0221 Hom.: 180

Mitomap

No disease associated.

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Feb 16, 2025

Laboratory of Genetics, Children's Clinical University Hospital Latvia

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		-1.4
Mutation Taster		=79/21	polymorphism

Other links and lift over

dbSNP: rs28358887; hg19: chrM-8995; COSMIC: COSV62293224; COSMIC: COSV62293224;