Variant X-64268734-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_017677.4(MTMR8):c.1918A>G(p.Met640Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000291 in 1,098,165 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 13 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 22)

Exomes 𝑓: 0.000029 ( 0 hom. 13 hem. )

Consequence

MTMR8
NM_017677.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.0340

Variant links:

Genes affected

MTMR8 (HGNC:16825): (myotubularin related protein 8) This gene encodes a member of the myotubularin-related family and is part of the MTMR6 subgroup. Family members are dual-specificity phosphatases and the encoded protein contains a phosphoinositide-binding domain (PID) and a SET-interacting domain (SID). Defects in other family members have been found in myotubular myopathic diseases. [provided by RefSeq, Mar 2010]

MTMR8 links:

LOC112268307 (HGNC:):

LOC112268307 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.080899656).

BS2

High Hemizygotes in GnomAdExome4 at 13 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
MTMR8	NM_017677.4 linkuse as main transcript	c.1918A>G	p.Met640Val	missense_variant	14/14	ENST00000374852.4	NP_060147.2
LOC112268307	XM_047442705.1 linkuse as main transcript	c.170+20928T>C		intron_variant			XP_047298661.1
LOC112268307	XM_047442706.1 linkuse as main transcript	c.126-36832T>C		intron_variant			XP_047298662.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MTMR8	ENST00000374852.4 linkuse as main transcript	c.1918A>G	p.Met640Val	missense_variant	14/14	1	NM_017677.4	ENSP00000363985	P1	Q96EF0-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000164

AC:

AN:

183373

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

67829

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000722

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000244

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000291

AC:

AN:

1098165

Hom.:

Cov.:

AF XY:

0.0000358

AC XY:

AN XY:

363531

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.0000321

Gnomad4 OTH exome

AF:

0.000108

GnomAD4 genome

Cov.:

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 30, 2024

The c.1918A>G (p.M640V) alteration is located in exon 14 (coding exon 14) of the MTMR8 gene. This alteration results from a A to G substitution at nucleotide position 1918, causing the methionine (M) at amino acid position 640 to be replaced by a valine (V). 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

0.063

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.34

CADD

Benign

0.070

DANN

Benign

0.53

DEOGEN2

Benign

0.050

FATHMM_MKL

Benign

0.017

LIST_S2

Benign

0.41

M_CAP

Benign

0.027

MetaRNN

Benign

0.081

MetaSVM

Benign

-0.43

MutationAssessor

Benign

0.34

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.23

PROVEAN

Benign

-0.11

REVEL

Benign

0.13

Sift

Benign

0.29

Sift4G

Benign

0.67

Polyphen

0.078

Vest4

0.11

MutPred

0.28

Gain of phosphorylation at T642 (P = 0.1257);

MVP

0.55

MPC

0.0030

ClinPred

0.025

GERP RS

2.2

Varity_R

0.26

gMVP

0.091

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