6-73461810-C-T

Variant names:

• chr6-73461810-C-T
• rs375406465
• NM_012123.4:c.-45C>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_012123.4(MTO1):​c.-45C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000316 in 1,582,424 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: MTO1 NM_012123.4 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.285
• Publications: 0 publications found

Genes affected

MTO1 (HGNC:19261): (mitochondrial tRNA translation optimization 1) This gene encodes a mitochondrial protein thought to be involved in mitochondrial tRNA modification. The encoded protein may also play a role in the expression of the non-syndromic and aminoglycoside-induced deafness phenotypes associated with a specific mutation in the mitochondrial 12S rRNA gene. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

CGAS (HGNC:21367): (cyclic GMP-AMP synthase) Enables several functions, including 2',3'-cyclic GMP-AMP synthase activity; chromatin binding activity; and phosphatidylinositol-4,5-bisphosphate binding activity. Involved in several processes, including cellular response to exogenous dsRNA; positive regulation of intracellular signal transduction; and regulation of defense response. Located in several cellular components, including cytosol; nucleus; and site of double-strand break. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.72).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012123.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MTO1	NM_012123.4	MANE Select	c.-45C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 12	NP_036255.2	Q9Y2Z2-4
	MTO1	NM_012123.4	MANE Select	c.-45C>T		5_prime_UTR	Exon 1 of 12	NP_036255.2	Q9Y2Z2-4
	MTO1	NM_001123226.2		c.-45C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 13	NP_001116698.1	Q9Y2Z2-6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MTO1	ENST00000498286.6	TSL:1 MANE Select	c.-45C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 12	ENSP00000419561.2	Q9Y2Z2-4
	MTO1	ENST00000415954.6	TSL:1	c.-45C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 13	ENSP00000402038.2	Q9Y2Z2-6
	MTO1	ENST00000370300.8	TSL:1	c.-45C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 13	ENSP00000359323.4	Q9Y2Z2-1

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152158 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000482

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000210 AC: 3 AN: 1430266 Hom.: 0 Cov.: 29 AF XY: 0.00000283 AC XY: 2 AN XY: 707574

African (AFR) AF: 0.00 AC: 0 AN: 32712

American (AMR) AF: 0.00 AC: 0 AN: 43334

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25164

East Asian (EAS) AF: 0.00 AC: 0 AN: 39134

South Asian (SAS) AF: 0.0000118 AC: 1 AN: 84478

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52912

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5646

European-Non Finnish (NFE) AF: 0.00000184 AC: 2 AN: 1087938

Other (OTH) AF: 0.00 AC: 0 AN: 58948

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152158 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74314

African (AFR) AF: 0.0000482 AC: 2 AN: 41458

American (AMR) AF: 0.00 AC: 0 AN: 15264

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10600

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68034

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.72
CADD	Benign	9.0
DANN	Benign	0.76
PhyloP100		-0.28
PromoterAI		-0.21	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs375406465; hg19: chr6-74171533;