chrM-12171-A-G

Position:

• chrM-12171-A-G

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4 BP6_Moderate BS2

The ENST00000387441.1(MT-TH):​n.34A>G variant causes a non coding transcript exon change involving the alteration of a non-conserved nucleotide. Variant has been reported in ClinVar as Benign (★).

• Frequency: Mitomap GenBank: 𝑓 0.0010 (AC: 62)
• Consequence: MT-TH ENST00000387441.1 non_coding_transcript_exon
• Scores: Mitotip Benign 4.9
• Clinical Significance: Benign criteria provided, single submitter B:1 No linked disesase in Mitomap
• Conservation: PhyloP100: 1.04

Genes affected

MT-TH (HGNC:7487): (mitochondrially encoded tRNA histidine)

TRNH (HGNC:):

MT-ND4 (HGNC:7459): (mitochondrially encoded NADH dehydrogenase 4) Enables NADH dehydrogenase (ubiquinone) activity. Involved in mitochondrial electron transport, NADH to ubiquinone and mitochondrial respiratory chain complex I assembly. Part of mitochondrial respiratory chain complex I. Implicated in Leber hereditary optic neuropathy; Parkinson's disease; macular degeneration; and schizophrenia. Biomarker of Alzheimer's disease. [provided by Alliance of Genome Resources, Apr 2022]

MT-TS2 (HGNC:7498): (mitochondrially encoded tRNA serine 2 (AGU/C))

ACMG classification

Verdict is Benign. Variant got -7 ACMG points.

• BP4: Mitotip and hmtvar scores support benign criterium.
• BP6: Variant M-12171-A-G is Benign according to our data. Variant chrM-12171-A-G is described in ClinVar as [Benign]. Clinvar id is 690141.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High AC in GnomadMitoHomoplasmic at 113

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TRNH	TRNH.1	n.34A>G		non_coding_transcript_exon_variant	1/1
TRNS2	TRNS2.1			upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MT-TH	ENST00000387441.1	n.34A>G		non_coding_transcript_exon_variant	1/1
MT-ND4	ENST00000361381.2			downstream_gene_variant				ENSP00000354961	P1
MT-TS2	ENST00000387449.1			upstream_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: 0.0010 AC: 62

Gnomad homoplasmic AF: 0.0020 AC: 113 AN: 56430

Gnomad heteroplasmic AF: 0.000018 AC: 1 AN: 56430

Alfa AF: 0.000445 Hom.: 2

Mitomap

No disease associated.

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Juvenile myopathy, encephalopathy, lactic acidosis AND stroke Benign:1

Benign, criteria provided, single submitter

clinical testing

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

Jul 12, 2019

The NC_012920.1:m.12171A>G variant in MT-TH gene is interpreted to be a Benign variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes reported in the guidelines: BS1, BS2, BP4 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Mitotip	Benign	4.9
Hmtvar	Benign	0.0

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1603223589; hg19: chrM-12172;