Genetic Variant NM_003245.4:c.746G>T (chr20-2317144-G-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_003245.4(TGM3):c.746G>T(p.Ser249Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,784 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S249N) has been classified as Benign.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TGM3
NM_003245.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.243

Publications

0 publications found

Variant links:

Genes affected

TGM3 (HGNC:11779): (transglutaminase 3) 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 consists of two polypeptide chains activated from a single precursor protein by proteolysis. The encoded protein is involved the later stages of cell envelope formation in the epidermis and hair follicle. [provided by RefSeq, Jul 2008]

TGM3 Gene-Disease associations (from GenCC):

uncombable hair syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
uncombable hair syndrome 2
Inheritance: AR Classification: LIMITED Submitted by: G2P

TGM3 links:

ENSG00000286022 (HGNC:):

ENSG00000286022 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=0.3487088).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003245.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TGM3	NM_003245.4	MANE Select	c.746G>T	p.Ser249Ile	missense	Exon 6 of 13	NP_003236.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
TGM3	ENST00000381458.6	TSL:1 MANE Select	c.746G>T	p.Ser249Ile	missense	Exon 6 of 13	ENSP00000370867.5
ENSG00000286022	ENST00000651531.1		c.803G>T	p.Ser268Ile	missense	Exon 7 of 14	ENSP00000498584.1
TGM3	ENST00000463090.1	TSL:3	n.126G>T		non_coding_transcript_exon	Exon 2 of 4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461784

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727184

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86242

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5692

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1112008

Other (OTH)

AF:

0.0000331

AC:

AN:

60386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.074

BayesDel_noAF

Benign

-0.34

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.71

Eigen

Benign

-0.56

Eigen_PC

Benign

-0.60

FATHMM_MKL

Benign

0.072

LIST_S2

Benign

0.36

M_CAP

Uncertain

0.14

MetaRNN

Benign

0.35

MetaSVM

Benign

-0.32

MutationAssessor

Uncertain

2.1

PhyloP100

0.24

PrimateAI

Benign

0.41

PROVEAN

Uncertain

-3.4

REVEL

Benign

0.25

Sift

Benign

0.038

Sift4G

Benign

0.15

Polyphen

0.55

Vest4

0.11

MutPred

0.43

Loss of disorder (P = 0.003)

MVP

0.84

MPC

0.12

ClinPred

0.52

GERP RS

-0.39

Varity_R

0.28

gMVP

0.25

Mutation Taster

=79/21

polymorphism

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over