22-30019582-G-T

Position:

chr22-30019582-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_021090.4(MTMR3):c.1923G>T(p.Trp641Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000031 in 1,613,772 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

MTMR3
NM_021090.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.23

Variant links:

Genes affected

MTMR3 (HGNC:7451): (myotubularin related protein 3) This gene encodes a member of the myotubularin dual specificity protein phosphatase gene family. The encoded protein is structurally similar to myotubularin but in addition contains a FYVE domain and an N-terminal PH-GRAM domain. The protein can self-associate and also form heteromers with another myotubularin related protein. The protein binds to phosphoinositide lipids through the PH-GRAM domain, and can hydrolyze phosphatidylinositol(3)-phosphate and phosphatidylinositol(3,5)-biphosphate in vitro. The encoded protein has been observed to have a perinuclear, possibly membrane-bound, distribution in cells, but it has also been found free in the cytoplasm. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

MTMR3 links:

(HGNC:):

links:

HORMAD2-AS1 (HGNC:50729): (HORMAD2 and MTMR3 antisense RNA 1)

HORMAD2-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
MTMR3	NM_021090.4 linkuse as main transcript	c.1923G>T	p.Trp641Cys	missense_variant	17/20	ENST00000401950.7
HORMAD2-AS1	NR_110541.2 linkuse as main transcript	n.362-853C>A		intron_variant, non_coding_transcript_variant
MTMR3	NM_153050.3 linkuse as main transcript	c.1923G>T	p.Trp641Cys	missense_variant	17/20
MTMR3	NM_153051.3 linkuse as main transcript	c.1923G>T	p.Trp641Cys	missense_variant	17/19

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MTMR3	ENST00000401950.7 linkuse as main transcript	c.1923G>T	p.Trp641Cys	missense_variant	17/20	1	NM_021090.4	P4	Q13615-1
	ENST00000624945.1 linkuse as main transcript	n.8655C>A		non_coding_transcript_exon_variant	1/1
HORMAD2-AS1	ENST00000429350.5 linkuse as main transcript	n.335-853C>A		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152224

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

GnomAD3 exomes

AF:

0.00000400

AC:

AN:

249810

Hom.:

AF XY:

0.00000739

AC XY:

AN XY:

135354

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000884

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461548

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727076

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:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152224

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74374

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:

0.00000756

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

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

May 08, 2023

The c.1923G>T (p.W641C) alteration is located in exon 17 (coding exon 15) of the MTMR3 gene. This alteration results from a G to T substitution at nucleotide position 1923, causing the tryptophan (W) at amino acid position 641 to be replaced by a cysteine (C). 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

Pathogenic

0.80

BayesDel_addAF

Pathogenic

0.36

BayesDel_noAF

Pathogenic

0.27

CADD

Uncertain

DANN

Benign

0.89

DEOGEN2

Benign

0.26

T;.;T;.;.

Eigen

Uncertain

0.23

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.83

T;T;T;T;.

M_CAP

Benign

0.054

MetaRNN

Uncertain

0.60

D;D;D;D;D

MetaSVM

Uncertain

0.30

MutationAssessor

Benign

0.69

N;N;.;N;N

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

-0.80

N;N;N;N;N

REVEL

Uncertain

0.44

Sift

Benign

0.39

T;T;T;T;T

Sift4G

Benign

0.49

T;T;T;T;T

Polyphen

0.19

B;B;.;B;B

Vest4

0.81

MutPred

0.19

Gain of methylation at K640 (P = 0.0292);Gain of methylation at K640 (P = 0.0292);.;Gain of methylation at K640 (P = 0.0292);Gain of methylation at K640 (P = 0.0292);

MVP

0.78

MPC

0.72

ClinPred

0.65

GERP RS

5.9

Varity_R

0.22

gMVP

0.56

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