M-15060-G-A

Position:

• chrM-15060-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The ENST00000361789.2(MT-CYB):​c.314G>A​(p.Gly105Glu) variant causes a missense change. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G105R) has been classified as Uncertain significance.

• Frequency: Mitomap GenBank: Absent
• Consequence: MT-CYB ENST00000361789.2 missense
• Scores: Apogee2 Pathogenic 0.94
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1 Mitochondrial-Respiratory-Chain-Disorder
• Conservation: PhyloP100: 6.20

Genes affected

CYTB (HGNC:):

MT-CYB (HGNC:7427): (mitochondrially encoded cytochrome b) Predicted to enable metal ion binding activity. Predicted to be involved in several processes, including electron transport coupled proton transport; response to cobalamin; and response to glucagon. Located in mitochondrion. Implicated in ovarian carcinoma and urinary bladder cancer. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: No frequency data in Mitomap. Probably very rare.
• PP3: Apogee2 supports a deletorius effect, 0.9373093 >= 0.5 .

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYTB	CYTB.1	c.314G>A	p.Gly105Glu	missense_variant	1/1		YP_003024038.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MT-CYB	ENST00000361789.2	c.314G>A	p.Gly105Glu	missense_variant	1/1			ENSP00000354554	P1

Frequencies

GnomAD4 exome Cov.: 0

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

Mitomap

Mitochondrial-Respiratory-Chain-Disorder

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Epilepsy;CN239810:Bilateral lesions of basal ganglia Pathogenic:1

Likely pathogenic, no assertion criteria provided

clinical testing

Center for Neuroscience and Cell Biology, University of Coimbra, Portugal

Nov 21, 2016

- -

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.15060G>A (YP_003024038.1:p.Gly105Glu) variant in MTCYB gene is interpretated to be a Uncertain Significance variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes: PP7 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Apogee2	Pathogenic	0.94
Hmtvar	Pathogenic	0.89
AlphaMissense	Pathogenic	0.67

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1057516072; hg19: chrM-15061;