rs121918729

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 1P and 5B. PP2BP4_StrongBP6

The NM_000359.3(TGM1):c.281G>A(p.Gly94Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00017 in 1,613,652 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. G94G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00016 ( 1 hom. )

Consequence

TGM1
NM_000359.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:3B:1

Conservation

PhyloP100: 1.61

Publications

5 publications found

Variant links:

Genes affected

TGM1 (HGNC:11777): (transglutaminase 1) The protein encoded by this gene is a membrane protein that catalyzes the addition of an alkyl group from an akylamine to a glutamine residue of a protein, forming an alkylglutamine in the protein. This protein alkylation leads to crosslinking of proteins and catenation of polyamines to proteins. This gene contains either one or two copies of a 22 nt repeat unit in its 3' UTR. Mutations in this gene have been associated with autosomal recessive lamellar ichthyosis (LI) and nonbullous congenital ichthyosiform erythroderma (NCIE). [provided by RefSeq, Jul 2008]

TGM1 Gene-Disease associations (from GenCC):

autosomal recessive congenital ichthyosis 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Myriad Women’s Health, PanelApp Australia, Genomics England PanelApp
acral self-healing collodion baby
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
bathing suit ichthyosis
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
congenital non-bullous ichthyosiform erythroderma
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
lamellar ichthyosis
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
self-healing collodion baby
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

TGM1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 81 curated pathogenic missense variants (we use a threshold of 10). The gene has 20 curated benign missense variants. Gene score misZ: -0.060191 (below the threshold of 3.09). Trascript score misZ: 1.7514 (below the threshold of 3.09). GenCC associations: The gene is linked to autosomal recessive congenital ichthyosis 1, acral self-healing collodion baby, bathing suit ichthyosis, congenital non-bullous ichthyosiform erythroderma, lamellar ichthyosis, self-healing collodion baby.

BP4

Computational evidence support a benign effect (MetaRNN=0.04891491).

BP6

Variant 14-24262072-C-T is Benign according to our data. Variant chr14-24262072-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 12497.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000359.3. 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
	TGM1	NM_000359.3	MANE Select	c.281G>A	p.Gly94Asp	missense	Exon 2 of 15	NP_000350.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
TGM1	ENST00000206765.11	TSL:1 MANE Select	c.281G>A	p.Gly94Asp	missense	Exon 2 of 15	ENSP00000206765.6
TGM1	ENST00000558074.1	TSL:5	c.281G>A	p.Gly94Asp	missense	Exon 3 of 4	ENSP00000453840.1
TGM1	ENST00000544573.5	TSL:2	c.-29+55G>A		intron	N/A	ENSP00000439446.1

Frequencies

GnomAD3 genomes

AF:

0.000263

AC:

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00157

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.000957

GnomAD2 exomes

AF:

0.000241

AC:

AN:

249052

AF XY:

0.000200

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000868

Gnomad ASJ exome

AF:

0.0000997

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000152

Gnomad OTH exome

AF:

0.000818

GnomAD4 exome

AF:

0.000160

AC:

234

AN:

1461320

Hom.:

Cov.:

AF XY:

0.000146

AC XY:

106

AN XY:

726974

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33480

American (AMR)

AF:

0.000939

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:

0.000185

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52900

Middle Eastern (MID)

AF:

0.000520

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000130

AC:

144

AN:

1111962

Other (OTH)

AF:

0.000447

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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

AF:

0.000263

AC:

AN:

152332

Hom.:

Cov.:

AF XY:

0.000295

AC XY:

AN XY:

74496

show subpopulations

African (AFR)

AF:

0.0000481

AC:

AN:

41570

American (AMR)

AF:

0.00157

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000147

AC:

AN:

68042

Other (OTH)

AF:

0.000947

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.484

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000189

Hom.:

Bravo

AF:

0.000283

ExAC

AF:

0.000231

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.000237

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:3Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Autosomal recessive congenital ichthyosis 1

Pathogenic:1Uncertain:2

Apr 01, 2001

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

Apr 27, 2019

Genomic Research Center, Shahid Beheshti University of Medical Sciences

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Jan 11, 2017

Counsyl

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com.

not provided

Uncertain:1Benign:1

Aug 16, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Observed with a non-coding TGM1 variant on the opposite allele (in trans) in a patient with congenital ichthyosis reported in the published literature (Cserhalmi-Friedman et al., 2001); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 11298529)

May 06, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

0.0071

BayesDel_noAF

Pathogenic

0.15

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.22

Eigen

Benign

-0.14

Eigen_PC

Benign

-0.077

FATHMM_MKL

Benign

0.60

M_CAP

Benign

0.049

MetaRNN

Benign

0.049

MetaSVM

Benign

-0.40

MutationAssessor

Benign

0.55

PhyloP100

1.6

PrimateAI

Uncertain

0.56

PROVEAN

Benign

0.97

REVEL

Uncertain

0.58

Sift

Benign

0.28

Sift4G

Benign

0.78

Polyphen

0.76

Vest4

0.81

MVP

0.97

MPC

0.46

ClinPred

0.046

GERP RS

3.9

Varity_R

0.052

gMVP

0.66

Mutation Taster

=30/70

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over