rs150088385

Positions:

chr20-2395316-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_StrongBP6BS2_Supporting

The NM_198994.3(TGM6):c.304G>A(p.Ala102Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000415 in 1,614,218 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00019 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

TGM6
NM_198994.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: -1.79

Variant links:

Genes affected

TGM6 (HGNC:16255): (transglutaminase 6) The protein encoded by this gene belongs to the transglutaminase superfamily. It catalyzes the cross-linking of proteins and the conjugation of polyamines to proteins. Mutations in this gene are associated with spinocerebellar ataxia type 35 (SCA35). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2011]

TGM6 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.046602577).

BP6

Variant 20-2395316-G-A is Benign according to our data. Variant chr20-2395316-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 586822.We mark this variant Likely_benign, oryginal submissions are: {Benign=1, Uncertain_significance=1}.

BS2

High AC in GnomAd4 at 29 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TGM6	NM_198994.3 linkuse as main transcript	c.304G>A	p.Ala102Thr	missense_variant	3/13	ENST00000202625.7	NP_945345.2
TGM6	NM_001254734.2 linkuse as main transcript	c.304G>A	p.Ala102Thr	missense_variant	3/12		NP_001241663.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TGM6	ENST00000202625.7 linkuse as main transcript	c.304G>A	p.Ala102Thr	missense_variant	3/13	1	NM_198994.3	ENSP00000202625	P1	O95932-1
TGM6	ENST00000381423.1 linkuse as main transcript	c.304G>A	p.Ala102Thr	missense_variant	3/12	1		ENSP00000370831		O95932-2
TGM6	ENST00000477505.1 linkuse as main transcript	n.174+691G>A		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes

AF:

0.000191

AC:

AN:

152220

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000651

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

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:

0.0000398

AC:

AN:

251422

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135886

show subpopulations

Gnomad AFR exome

AF:

0.000615

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:

0.0000260

AC:

AN:

1461880

Hom.:

Cov.:

AF XY:

0.0000275

AC XY:

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.000777

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000126

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000190

AC:

AN:

152338

Hom.:

Cov.:

AF XY:

0.000174

AC XY:

AN XY:

74500

show subpopulations

Gnomad4 AFR

AF:

0.000649

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000272

Hom.:

Bravo

AF:

0.000227

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000494

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Sep 29, 2022	In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt TGM6 protein function. ClinVar contains an entry for this variant (Variation ID: 586822). This variant has not been reported in the literature in individuals affected with TGM6-related conditions. This variant is present in population databases (rs150088385, gnomAD 0.07%), and has an allele count higher than expected for a pathogenic variant. This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 102 of the TGM6 protein (p.Ala102Thr). -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jun 14, 2018	- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.069

BayesDel_addAF

Benign

-0.50

BayesDel_noAF

Benign

-0.55

CADD

Benign

0.031

DANN

Benign

0.73

DEOGEN2

Benign

0.069

T;.

Eigen

Benign

-1.7

Eigen_PC

Benign

-1.8

FATHMM_MKL

Benign

0.0079

LIST_S2

Benign

0.058

T;T

M_CAP

Benign

0.072

MetaRNN

Benign

0.047

T;T

MetaSVM

Benign

-0.89

MutationAssessor

Benign

-0.34

N;N

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.22

PROVEAN

Benign

-0.38

N;N

REVEL

Benign

0.24

Sift

Benign

0.58

T;T

Sift4G

Benign

0.92

T;T

Polyphen

0.0

B;B

Vest4

0.072

MVP

0.12

MPC

0.080

ClinPred

0.018

GERP RS

-9.0

Varity_R

0.030

gMVP

0.085

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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