Genetic Variant MTG1:p.Leu3Trp (chr10-133394228-T-G) – 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.8T>G(p.Leu3Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000264 in 1,516,734 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign 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. L3S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000022 ( 0 hom. )

Consequence

MTG1
NM_138384.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.763

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=0.12697405).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MTG1	NM_138384.4 link	c.8T>G	p.Leu3Trp	missense_variant	Exon 1 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.8T>G	p.Leu3Trp	missense_variant	Exon 1 of 11	1	NM_138384.4	ENSP00000323047.6	Q9BT17-1
MTG1	ENST00000477902.6 link	c.-12+44T>G		intron_variant	Intron 1 of 10	3		ENSP00000475596.1	U3KQ69
ENSG00000254536	ENST00000468317.3 link	n.*37-1485T>G		intron_variant	Intron 6 of 15	5		ENSP00000436767.2	B0QZA9
ENSG00000254536	ENST00000670407.1 link	n.*279-1485T>G		intron_variant	Intron 5 of 6			ENSP00000499264.1	A0A590UJ37

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.00000220

AC:

AN:

1364596

Hom.:

Cov.:

AF XY:

0.00000149

AC XY:

AN XY:

673362

show subpopulations

Gnomad4 AFR exome

AF:

0.0000358

Gnomad4 AMR exome

AF:

0.00

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:

0.00000187

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152138

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74332

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000264

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 21, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.8T>G (p.L3W) alteration is located in exon 1 (coding exon 1) of the MTG1 gene. This alteration results from a T to G substitution at nucleotide position 8, causing the leucine (L) at amino acid position 3 to be replaced by a tryptophan (W). 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

0.10

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Benign

-0.40

CADD

Benign

DANN

Benign

0.92

DEOGEN2

Benign

0.037

T;T

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.031

LIST_S2

Benign

0.42

T;T

M_CAP

Benign

0.026

MetaRNN

Benign

0.13

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.0

M;.

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-0.79

N;N

REVEL

Benign

0.046

Sift

Uncertain

0.0020

D;D

Sift4G

Uncertain

0.0030

D;D

Polyphen

0.0010

B;.

Vest4

0.48

MutPred

0.28

Loss of methylation at R2 (P = 0.0264);Loss of methylation at R2 (P = 0.0264);

MVP

0.24

MPC

0.033

ClinPred

0.21

GERP RS

-0.13

Varity_R

0.12

gMVP

0.54

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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