2-70212730-C-T

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 8P and 1B. PP5_Very_StrongBP4

The NM_022173.4(TIA1):c.1150G>A(p.Glu384Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000217 in 1,612,010 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000022 ( 0 hom. )

Consequence

TIA1
NM_022173.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:7

Conservation

PhyloP100: 3.10

Variant links:

Genes affected

TIA1 (HGNC:11802): (TIA1 cytotoxic granule associated RNA binding protein) The product encoded by this gene is a member of a RNA-binding protein family and possesses nucleolytic activity against cytotoxic lymphocyte (CTL) target cells. It has been suggested that this protein may be involved in the induction of apoptosis as it preferentially recognizes poly(A) homopolymers and induces DNA fragmentation in CTL targets. The major granule-associated species is a 15-kDa protein that is thought to be derived from the carboxyl terminus of the 40-kDa product by proteolytic processing. Alternative splicing resulting in different isoforms has been found for this gene. [provided by RefSeq, May 2017]

TIA1 links:

C2orf42 (HGNC:26056): (chromosome 2 open reading frame 42) Located in nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

C2orf42 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

PP5

Variant 2-70212730-C-T is Pathogenic according to our data. Variant chr2-70212730-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 41480.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-70212730-C-T is described in Lovd as [Likely_pathogenic]. Variant chr2-70212730-C-T is described in Lovd as [Pathogenic].

BP4

Computational evidence support a benign effect (MetaRNN=0.1674974). . Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TIA1	NM_022173.4 link	c.1150G>A	p.Glu384Lys	missense_variant	Exon 13 of 13	ENST00000433529.7	NP_071505.2	P31483-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TIA1	ENST00000433529.7 link	c.1150G>A	p.Glu384Lys	missense_variant	Exon 13 of 13	2	NM_022173.4	ENSP00000401371.2		P31483-1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152222

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000358

AC:

AN:

251450

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135894

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.0000615

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000219

AC:

AN:

1459788

Hom.:

Cov.:

AF XY:

0.0000124

AC XY:

AN XY:

726350

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.000187

Gnomad4 NFE exome

AF:

0.0000171

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152222

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74370

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ExAC

AF:

0.0000576

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:5

Mar 22, 2019

Revvity Omics, Revvity

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 17, 2019

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Published functional studies demonstrate a damaging effect (increase in stress granule abundance) (Hackman et al., 2013); This variant is associated with the following publications: (PMID: 23348830, 23401021, 10482271, 27282841, 28221306, 28817800, 30348846, 31321302, 33144682) -

Jul 01, 2014

Clinical Genetics and Genomics, Karolinska University Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 05, 2024

Athena Diagnostics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The frequency of this variant in the general population is consistent with pathogenicity. (http://gnomad.broadinstitute.org) This variant is statistically more frequent in affected individuals than in the general population and/or healthy controls. The variant is a common founder associated with Welander distal myopathy originating from Finland and Sweden (PMID: 23348830, 23401021). Assessment of experimental evidence suggests this variant results in abnormal protein function. (PMID: 23401021, 28817800) -

Jan 29, 2024

Clinical Genetics Laboratory, Skane University Hospital Lund

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Welander distal myopathy

Pathogenic:2

Apr 01, 2013

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 384 of the TIA1 protein (p.Glu384Lys). This variant is present in population databases (rs747068278, gnomAD 0.007%). This missense change has been observed in individuals with Welander distal myopathy (WDM) (PMID: 10482271, 23348830, 23401021, 27282841). It is commonly reported in individuals of Finnish ancestry (PMID: 10482271, 23348830, 23401021, 27282841). ClinVar contains an entry for this variant (Variation ID: 41480). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. Experimental studies have shown that this missense change affects TIA1 function (PMID: 23401021, 28817800). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.51

BayesDel_addAF

Uncertain

0.033

BayesDel_noAF

Uncertain

-0.010

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.25

T;.;T;T

Eigen

Benign

-0.13

Eigen_PC

Benign

0.080

FATHMM_MKL

Uncertain

0.82

LIST_S2

Uncertain

0.87

D;D;D;D

M_CAP

Benign

0.0096

MetaRNN

Benign

0.17

T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.0

N;.;.;.

PrimateAI

Uncertain

0.69

PROVEAN

Benign

-0.67

N;N;N;N

REVEL

Benign

0.13

Sift

Benign

0.057

T;T;T;D

Sift4G

Benign

0.60

T;T;T;T

Polyphen

0.036

B;B;.;.

Vest4

0.41

MutPred

0.31

Gain of MoRF binding (P = 1e-04);.;.;.;

MVP

0.92

MPC

0.69

ClinPred

0.26

GERP RS

5.1

Varity_R

0.17

gMVP

0.58

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