chrM-3236-A-G

Position:

• chrM-3236-A-G

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2 BP6_Moderate BS2

Variant has been reported in ClinVar as Benign (★).

• Frequency: Mitomap GenBank: 𝑓 0.0 (AC: 2)
• Consequence: TRNL1 missense
• Scores: Mitotip Uncertain 11
• Clinical Significance: Benign criteria provided, single submitter B:1 Sporadic-bilateral-optic-neuropathy-/-hearing-loss
• Conservation: PhyloP100: 0.815

Genes affected

TRNL1 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• PM2: Very low frequency in mitomap database: 0.0
• BP6: Variant M-3236-A-G is Benign according to our data. Variant chrM-3236-A-G is described in ClinVar as [Benign]. Clinvar id is 689855.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High AC in GnomadMitoHomoplasmic at 7

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TRNL1	unassigned_transcript_4789	c.7A>G	p.Met3Val	missense_variant	1/1
RNR2	unassigned_transcript_4788	n.*7A>G		downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt

Frequencies

GnomAD4 exome Cov.: 0

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

Mitomap GenBank AF: 0.0 AC: 2

Gnomad homoplasmic AF: 0.00012 AC: 7 AN: 56434

Gnomad heteroplasmic AF: 0.0 AC: 0 AN: 56434

Mitomap

Sporadic-bilateral-optic-neuropathy-/-hearing-loss

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

MELAS syndrome 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.3236A>G variant in MT-TL1 gene is interpreted to be a Benign variant based on the modified ACMG guidelines (unpublished).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 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Mitotip	Uncertain	11
Hmtvar	Benign	0.050

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1603218849; hg19: chrM-3237;