NM_004817.4:c.1258C>T

Variant names:

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_004817.4(TJP2):c.1258C>T(p.Arg420Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000218 in 1,613,784 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00034 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 3 hom. )

Consequence

TJP2
NM_004817.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:2

Conservation

PhyloP100: 2.39

Publications

5 publications found

Variant links:

Genes affected

TJP2 (HGNC:11828): (tight junction protein 2) This gene encodes a zonula occluden that is a member of the membrane-associated guanylate kinase homolog family. The encoded protein functions as a component of the tight junction barrier in epithelial and endothelial cells and is necessary for proper assembly of tight junctions. Mutations in this gene have been identified in patients with hypercholanemia, and genomic duplication of a 270 kb region including this gene causes autosomal dominant deafness-51. Alternatively spliced transcripts encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Nov 2011]

TJP2 Gene-Disease associations (from GenCC):

cholestasis, progressive familial intrahepatic, 4
Inheritance: AR Classification: STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
autosomal dominant nonsyndromic hearing loss
Inheritance: AD Classification: SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Orphanet
familial hypercholanemia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
nonsyndromic genetic hearing loss
Inheritance: AD Classification: LIMITED Submitted by: ClinGen
hypercholanemia, familial 1
Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

TJP2 links:

ENSG00000285130 (HGNC:):

ENSG00000285130 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.012251347).

BS2

High Homozygotes in GnomAdExome4 at 3 AD,Unknown,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TJP2	NM_004817.4 link	c.1258C>T	p.Arg420Cys	missense_variant	Exon 8 of 23	ENST00000377245.9	NP_004808.2	Q9UDY2-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TJP2	ENST00000377245.9 link	c.1258C>T	p.Arg420Cys	missense_variant	Exon 8 of 23	1	NM_004817.4	ENSP00000366453.4		Q9UDY2-1
ENSG00000285130	ENST00000642889.1 link	c.1645C>T	p.Arg549Cys	missense_variant	Exon 10 of 25			ENSP00000493780.1		A0A2R8YDH4

Frequencies

GnomAD3 genomes

AF:

0.000342

AC:

AN:

152098

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000967

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00229

Gnomad ASJ

AF:

0.000865

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.000956

GnomAD2 exomes

AF:

0.000434

AC:

109

AN:

251344

AF XY:

0.000574

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.000636

Gnomad ASJ exome

AF:

0.000298

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.000139

Gnomad NFE exome

AF:

0.000167

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000205

AC:

299

AN:

1461568

Hom.:

Cov.:

AF XY:

0.000293

AC XY:

213

AN XY:

727086

show subpopulations

African (AFR)

AF:

0.0000598

AC:

AN:

33472

American (AMR)

AF:

0.000559

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.000306

AC:

AN:

26134

East Asian (EAS)

AF:

0.000151

AC:

AN:

39690

South Asian (SAS)

AF:

0.00188

AC:

162

AN:

86254

European-Finnish (FIN)

AF:

0.0000749

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5730

European-Non Finnish (NFE)

AF:

0.0000630

AC:

AN:

1111774

Other (OTH)

AF:

0.000364

AC:

AN:

60382

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

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

AF:

0.000342

AC:

AN:

152216

Hom.:

Cov.:

AF XY:

0.000416

AC XY:

AN XY:

74430

show subpopulations

African (AFR)

AF:

0.0000964

AC:

AN:

41502

American (AMR)

AF:

0.00229

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.000865

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.000414

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10598

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

68016

Other (OTH)

AF:

0.000946

AC:

AN:

2114

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:

0.000174

Hom.:

Bravo

AF:

0.000397

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000404

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000296

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3Benign:1

Apr 18, 2023

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 13, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Identified in a patient with gallstone disease in published literature, reported as p.(R178C) using alternate nomenclature, however, additional information about genotype and phenotype was not available (PMID: 37208429); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 37208429) -

Breakthrough Genomics, Breakthrough Genomics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Feb 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

TJP2: BP4 -

not specified

Uncertain:1

May 01, 2014

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant classified as Uncertain Significance - Favor Benign. The Arg397Cys varia nt in TJP2 has not been previously reported in individuals with hearing loss, bu t has been identified in 0.04% (3/8600) of European American chromosomes by the NHLBI Exome Sequencing Project (http://evs.gs.washington.edu/EVS/; dbSNP rs19976 1505). Arg397 is not conserved in mammals and across evolutionary distant specie s, supporting that a change at this position may be tolerated. Additional comput ational prediction tools do not provide strong support for or against an impact to the protein. In summary, the clinical significance of this variant cannot be determined with certainty; however based upon the conservation data, we would le an towards a more likely benign role. -

Cholestasis, progressive familial intrahepatic, 4;C5542604:Hypercholanemia, familial 1

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

TJP2-related disorder

Benign:1

Feb 08, 2024

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.23

CADD

Uncertain

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.52

.;.;.;.;D;.;D;.;.;.;.;.;.;.

Eigen

Uncertain

0.53

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.91

D;D;D;D;.;D;D;D;D;D;D;D;D;D

M_CAP

Benign

0.039

MetaRNN

Benign

0.012

T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.6

.;.;.;.;M;M;M;.;.;.;.;.;.;.

PhyloP100

2.4

PrimateAI

Benign

0.40

PROVEAN

Uncertain

-3.6

.;D;.;.;.;D;D;.;.;.;D;.;D;.

REVEL

Benign

0.14

Sift

Uncertain

0.0040

.;D;.;.;.;D;D;.;.;.;D;.;D;.

Sift4G

Uncertain

0.0090

.;D;.;.;.;D;D;.;.;.;D;.;D;.

Polyphen

1.0, 0.99

.;.;.;.;D;D;D;.;.;.;.;.;.;.

Vest4

0.54, 0.56, 0.50, 0.49, 0.63

MVP

0.64

MPC

0.85

ClinPred

0.11

GERP RS

4.9

PromoterAI

-0.087

Neutral

(source)

Varity_R

0.16

gMVP

0.38

Mutation Taster

=80/20

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over