Genetic Variant TM2D3:p.Thr226Met (chr15-101642546-G-A) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP5

The NM_078474.3(TM2D3):c.677C>T(p.Thr226Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000105 in 1,613,250 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (no stars).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

TM2D3
NM_078474.3 missense

Scores

Clinical Significance

Likely pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 7.87

Variant links:

Genes affected

TM2D3 (HGNC:24128): (TM2 domain containing 3) The protein encoded by this gene contains a structural module related to that of the seven transmembrane domain G protein-coupled receptor superfamily. This protein has sequence and structural similarities to the beta-amyloid binding protein (BBP), but, unlike BBP, it does not regulate a response to beta-amyloid peptide. This protein may have regulatory roles in cell death or proliferation signal cascades. Several alternatively spliced transcript variants of this gene are described but the full length nature of some variants has not been determined. Multiple polyadenylation sites have been found in this gene. [provided by RefSeq, Jul 2008]

TM2D3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 15-101642546-G-A is Pathogenic according to our data. Variant chr15-101642546-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 3370441.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TM2D3	NM_078474.3 link	c.677C>T	p.Thr226Met	missense_variant	Exon 6 of 6	ENST00000333202.8	NP_510883.2	Q9BRN9-1
TM2D3	NM_025141.4 link	c.599C>T	p.Thr200Met	missense_variant	Exon 5 of 5		NP_079417.2	Q9BRN9-2
TM2D3	NM_001308026.2 link	c.578+2541C>T		intron_variant	Intron 5 of 5		NP_001294955.1	H0YNS4B4DLL2
TM2D3	NM_001307960.2 link	c.500+2541C>T		intron_variant	Intron 4 of 4		NP_001294889.1	E7EPS7B4DLL2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TM2D3	ENST00000333202.8 link	c.677C>T	p.Thr226Met	missense_variant	Exon 6 of 6	1	NM_078474.3	ENSP00000330433.3		Q9BRN9-1

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000402

AC:

AN:

248946

Hom.:

AF XY:

0.00

AC XY:

AN XY:

134832

show subpopulations

Gnomad AFR exome

AF:

0.0000622

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461110

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726858

show subpopulations

Gnomad4 AFR exome

AF:

0.000149

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:

0.00000450

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152140

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74326

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000264

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

TM2D3-related disorder

Pathogenic:1

Oct 31, 2024

Medical Genetics Department, University Hospital Nantes, CHU Nantes

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: research

ACMG criteria applied: PM2 (At extreme low frequency), PM3 (Detected in trans with a pathogenic variant), PP1 (Co-segregation with disease in multiple family members) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.89

BayesDel_addAF

Pathogenic

0.34

BayesDel_noAF

Pathogenic

0.43

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.20

.;T;.

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.81

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

D;D;D

M_CAP

Benign

0.066

MetaRNN

Uncertain

0.72

D;D;D

MetaSVM

Uncertain

-0.023

MutationAssessor

Uncertain

2.7

.;M;.

PrimateAI

Pathogenic

0.86

PROVEAN

Pathogenic

-5.7

D;D;D

REVEL

Pathogenic

0.72

Sift

Pathogenic

0.0

D;D;D

Sift4G

Uncertain

0.012

D;D;D

Polyphen

1.0

D;D;.

Vest4

0.79

MutPred

0.62

.;Gain of sheet (P = 0.1945);.;

MVP

0.13

MPC

0.42

ClinPred

1.0

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.78

gMVP

0.93

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