Genetic Variant MTG1:p.Leu68Met (chr10-133396187-C-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_138384.4(MTG1):c.202C>A(p.Leu68Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,862 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MTG1
NM_138384.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0890

Variant links:

Genes affected

MTG1 (HGNC:32159): (mitochondrial ribosome associated GTPase 1) Enables GTPase activity. Involved in regulation of mitochondrial translation and regulation of respiratory system process. Located in mitochondrial inner membrane and mitochondrial ribosome. [provided by Alliance of Genome Resources, Apr 2022]

MTG1 links:

ENSG00000254536 (HGNC:):

ENSG00000254536 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1353957).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MTG1	NM_138384.4 link	c.202C>A	p.Leu68Met	missense_variant	Exon 3 of 11	ENST00000317502.11	NP_612393.2	Q9BT17-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MTG1	ENST00000317502.11 link	c.202C>A	p.Leu68Met	missense_variant	Exon 3 of 11	1	NM_138384.4	ENSP00000323047.6	Q9BT17-1
MTG1	ENST00000477902.6 link	c.79C>A	p.Leu27Met	missense_variant	Exon 3 of 11	3		ENSP00000475596.1	U3KQ69
ENSG00000254536	ENST00000468317.3 link	n.*126C>A		non_coding_transcript_exon_variant	Exon 8 of 16	5		ENSP00000436767.2	B0QZA9
ENSG00000254536	ENST00000468317.3 link	n.*126C>A		3_prime_UTR_variant	Exon 8 of 16	5		ENSP00000436767.2	B0QZA9
ENSG00000254536	ENST00000670407.1 link	n.*368C>A		downstream_gene_variant				ENSP00000499264.1	A0A590UJ37

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251490

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135920

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461862

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727220

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 17, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.202C>A (p.L68M) alteration is located in exon 3 (coding exon 3) of the MTG1 gene. This alteration results from a C to A substitution at nucleotide position 202, causing the leucine (L) at amino acid position 68 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.63

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.028

.;.;T;T

Eigen

Benign

-0.44

Eigen_PC

Benign

-0.32

FATHMM_MKL

Benign

0.41

LIST_S2

Benign

0.76

.;T;T;T

M_CAP

Benign

0.0028

MetaRNN

Benign

0.14

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.88

.;.;L;.

PrimateAI

Benign

0.45

PROVEAN

Benign

-0.37

N;.;N;N

REVEL

Benign

0.015

Sift

Benign

0.12

T;.;T;T

Sift4G

Benign

0.32

T;T;T;T

Polyphen

0.13

.;.;B;.

Vest4

0.33

MutPred

0.40

.;.;Loss of helix (P = 0.0626);Loss of helix (P = 0.0626);

MVP

0.30

MPC

0.048

ClinPred

0.052

GERP RS

1.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.070

gMVP

0.30

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over