Genetic Variant MTMR12:p.Val719Ile (chr5-32229867-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001040446.3(MTMR12):c.2155G>A(p.Val719Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000472 in 1,608,574 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000050 ( 0 hom. )

Consequence

MTMR12
NM_001040446.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.68

Variant links:

Genes affected

MTMR12 (HGNC:18191): (myotubularin related protein 12) Phosphatidylinositide 3-kinase-derived membrane-anchored phosphatidylinositides, such as phosphatidylinositol 3-phosphate (PtdIns(3)P), regulate diverse cellular processes. The protein encoded by this gene functions as an adaptor subunit in a complex with an active PtdIns(3)P 3-phosphatase. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2014]

MTMR12 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.05938247).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MTMR12	NM_001040446.3 link	c.2155G>A	p.Val719Ile	missense_variant	Exon 16 of 16	ENST00000382142.8	NP_001035536.1	Q9C0I1-1
MTMR12	NM_001294343.2 link	c.1993G>A	p.Val665Ile	missense_variant	Exon 15 of 15		NP_001281272.1	Q9C0I1-2
MTMR12	NM_001294344.2 link	c.1825G>A	p.Val609Ile	missense_variant	Exon 14 of 14		NP_001281273.1	Q9C0I1-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MTMR12	ENST00000382142.8 link	c.2155G>A	p.Val719Ile	missense_variant	Exon 16 of 16	1	NM_001040446.3	ENSP00000371577.3	Q9C0I1-1
MTMR12	ENST00000280285.9 link	c.1993G>A	p.Val665Ile	missense_variant	Exon 15 of 15	1		ENSP00000280285.5	Q9C0I1-2
MTMR12	ENST00000264934.5 link	c.1825G>A	p.Val609Ile	missense_variant	Exon 14 of 14	2		ENSP00000264934.5	Q9C0I1-3
MTMR12	ENST00000510216.1 link	n.*218G>A		downstream_gene_variant		2

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152186

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000161

AC:

AN:

247696

Hom.:

AF XY:

0.0000224

AC XY:

AN XY:

133900

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000335

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000267

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000501

AC:

AN:

1456388

Hom.:

Cov.:

AF XY:

0.0000414

AC XY:

AN XY:

724004

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:

0.0000585

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000604

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152186

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74330

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:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.0000189

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 17, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2155G>A (p.V719I) alteration is located in exon 16 (coding exon 16) of the MTMR12 gene. This alteration results from a G to A substitution at nucleotide position 2155, causing the valine (V) at amino acid position 719 to be replaced by an isoleucine (I). 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

0.081

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.33

CADD

Benign

DANN

Benign

0.86

DEOGEN2

Benign

0.0041

.;T;.

Eigen

Benign

-0.76

Eigen_PC

Benign

-0.60

FATHMM_MKL

Uncertain

0.78

LIST_S2

Benign

0.65

T;T;T

M_CAP

Uncertain

0.090

MetaRNN

Benign

0.059

T;T;T

MetaSVM

Benign

-0.53

MutationAssessor

Benign

0.46

.;N;.

PrimateAI

Benign

0.40

PROVEAN

Benign

0.040

N;N;N

REVEL

Benign

0.20

Sift

Benign

0.76

T;T;T

Sift4G

Benign

0.54

T;T;T

Polyphen

0.0030

B;B;B

Vest4

0.071

MVP

0.34

MPC

0.38

ClinPred

0.030

GERP RS

4.1

Varity_R

0.011

gMVP

0.12

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