chrM-9286-T-C

Position:

• chrM-9286-T-C

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4 BP6_Moderate

The ENST00000362079.2(MT-CO3):​c.80T>C​(p.Met27Thr) variant causes a missense change. In-silico tool predicts a benign outcome for this variant. 7/11 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Mitomap GenBank: 𝑓 0.00030 (AC: 16)
• Consequence: MT-CO3 ENST00000362079.2 missense
• Scores: Apogee2 Benign 0.028
• Clinical Significance: Likely benign criteria provided, single submitter B:1 No linked disesase in Mitomap
• Conservation: PhyloP100: 4.89

Genes affected

COX3 (HGNC:):

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]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• BP4: Apogee2 supports a benign effect, 0.028367583 < 0.5 .
• BP6: Variant M-9286-T-C is Benign according to our data. Variant chrM-9286-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 693138.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COX3	COX3.1	c.80T>C	p.Met27Thr	missense_variant	1/1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MT-CO3	ENST00000362079.2	c.80T>C	p.Met27Thr	missense_variant	1/1			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: 0.00030 AC: 16

Gnomad homoplasmic AF: 0.000053 AC: 3 AN: 56429

Gnomad heteroplasmic AF: 0.0 AC: 0 AN: 56429

Mitomap

No disease associated.

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Leigh syndrome Benign:1

Likely 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.9286T>C (YP_003024032.1:p.Met27Thr) variant in MTCO3 gene is interpretated to be a Likely Benign variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes: BS1, BP4 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Apogee2	Benign	0.028
Hmtvar	Benign	0.14
AlphaMissense	Benign	0.30
BayesDel_addAF	Benign	-0.34	T
DEOGEN2	Benign	0.024	T
LIST_S2	Benign	0.45	T
MutationAssessor	Benign	0.85	L
MutationTaster	Benign	1.0	N
PROVEAN	Benign	-1.7	N
Sift	Uncertain	0.0080	D
Sift4G	Benign	0.34	T
GERP RS		4.0
Varity_R		0.25

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1603222214; hg19: chrM-9287; COSMIC: COSV104419787; COSMIC: COSV104419787;