Genetic Variant TGM2:p.Ala578Thr (chr20-38132384-C-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_004613.4(TGM2):c.1732G>A(p.Ala578Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Consequence

TGM2
NM_004613.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.25

Publications

1 publications found

Variant links:

Genes affected

TGM2 (HGNC:11778): (transglutaminase 2) Transglutaminases are enzymes that catalyze the crosslinking of proteins by epsilon-gamma glutamyl lysine isopeptide bonds. While the primary structure of transglutaminases is not conserved, they all have the same amino acid sequence at their active sites and their activity is calcium-dependent. The protein encoded by this gene acts as a monomer, is induced by retinoic acid, and appears to be involved in apoptosis. Finally, the encoded protein is the autoantigen implicated in celiac disease. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

TGM2 Gene-Disease associations (from GenCC):

type 2 diabetes mellitus
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

TGM2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.318866).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TGM2	NM_004613.4 link	c.1732G>A	p.Ala578Thr	missense_variant	Exon 11 of 13	ENST00000361475.7	NP_004604.2	P21980-1V9HWG3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TGM2	ENST00000361475.7 link	c.1732G>A	p.Ala578Thr	missense_variant	Exon 11 of 13	1	NM_004613.4	ENSP00000355330.2		P21980-1
TGM2	ENST00000469269.1 link	n.1377G>A		non_coding_transcript_exon_variant	Exon 1 of 3	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251480

AF XY:

0.00

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 08, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1732G>A (p.A578T) alteration is located in exon 11 (coding exon 11) of the TGM2 gene. This alteration results from a G to A substitution at nucleotide position 1732, causing the alanine (A) at amino acid position 578 to be replaced by a threonine (T). 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

0.15

BayesDel_addAF

Benign

-0.034

BayesDel_noAF

Benign

-0.29

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.15

Eigen

Uncertain

0.42

Eigen_PC

Uncertain

0.40

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.79

M_CAP

Benign

0.018

MetaRNN

Benign

0.32

MetaSVM

Benign

-0.99

MutationAssessor

Uncertain

2.3

PhyloP100

3.2

PrimateAI

Uncertain

0.52

PROVEAN

Benign

-0.99

REVEL

Benign

0.094

Sift

Uncertain

0.017

Sift4G

Benign

0.27

Polyphen

0.95

Vest4

0.29

MVP

0.49

MPC

0.30

ClinPred

0.66

GERP RS

3.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.48

gMVP

0.74

Mutation Taster

=34/66

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over