M-7632-T-C

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The ENST00000361739.1(MT-CO2):c.47T>C(p.Ile16Thr) variant causes a missense change. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Mitomap GenBank: 𝑓 0.00010 (AC: 8)
• Consequence: MT-CO2 ENST00000361739.1 missense
• Scores: Apogee2 Benign 0.12
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 No linked disesase in Mitomap
• Conservation: PhyloP100: 4.88

Genes affected

COX2 (HGNC:):

MT-CO2 (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]

MT-TD (HGNC:7478): (mitochondrially encoded tRNA aspartic acid)

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• BP4: Apogee2 supports a benign effect, 0.11909531 < 0.5 .

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COX2	COX2.1	c.47T>C	p.Ile16Thr	missense_variant	1/1
TRND	TRND.1			downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MT-CO2	ENST00000361739.1	c.47T>C	p.Ile16Thr	missense_variant	1/1			P1
MT-TD	ENST00000387419.1			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: 0.00010 AC: 8

Gnomad homoplasmic AF: 0.000018 AC: 1 AN: 56432

Gnomad heteroplasmic AF: 0.0 AC: 0 AN: 56432

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.7632T>C (YP_003024029.1:p.Ile16Thr) variant in MTCO2 gene is interpretated to be a Uncertain Significance variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes: no criteria -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Apogee2	Benign	0.12
Hmtvar	Pathogenic	0.46
AlphaMissense	Uncertain	0.54
BayesDel_addAF	Benign	-0.19	T
DEOGEN2	Benign	0.082	T
LIST_S2	Benign	0.65	T
MutationAssessor	Uncertain	2.3	M
MutationTaster	Benign	1.0	N
PROVEAN	Pathogenic	-4.4	D
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
GERP RS		5.2
Varity_R		0.38

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1603221049; hg19: chrM-7633;