NM_004817.4:c.904C>T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_004817.4(TJP2):c.904C>T(p.Arg302Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000627 in 1,594,978 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000035 ( 0 hom. )

Consequence

TJP2
NM_004817.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.83

Publications

0 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: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.08623448).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TJP2	NM_004817.4 link	c.904C>T	p.Arg302Trp	missense_variant	Exon 5 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.904C>T	p.Arg302Trp	missense_variant	Exon 5 of 23	1	NM_004817.4	ENSP00000366453.4		Q9UDY2-1
ENSG00000285130	ENST00000642889.1 link	c.1291C>T	p.Arg431Trp	missense_variant	Exon 7 of 25			ENSP00000493780.1		A0A2R8YDH4

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000196

AC:

AN:

203914

AF XY:

0.0000179

show subpopulations

Gnomad AFR exome

AF:

0.000362

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.00000347

AC:

AN:

1442776

Hom.:

Cov.:

AF XY:

0.00000419

AC XY:

AN XY:

715980

show subpopulations

African (AFR)

AF:

0.0000906

AC:

AN:

33100

American (AMR)

AF:

0.00

AC:

AN:

42370

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25700

East Asian (EAS)

AF:

0.00

AC:

AN:

38940

South Asian (SAS)

AF:

0.0000120

AC:

AN:

83540

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51124

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5742

European-Non Finnish (NFE)

AF:

9.07e-7

AC:

AN:

1102696

Other (OTH)

AF:

0.00

AC:

AN:

59564

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.465

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:

0.0000329

AC:

AN:

152202

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74350

show subpopulations

African (AFR)

AF:

0.0000965

AC:

AN:

41472

American (AMR)

AF:

0.0000654

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

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:

0.000951

Hom.:

Bravo

AF:

0.0000567

ExAC

AF:

0.00000842

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 07, 2013

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 Arg279Trp varia nt in TJP2 has not been reported in the literature nor previously identified by our laboratory. Computational analyses (biochemical amino acid properties, conse rvation, AlignGVGD, PolyPhen2, and SIFT) do not provide strong support for or ag ainst an impact to the protein; however, the Arg279 site is poorly conserved in mammals. In summary, additional data is needed to determine the clinical signifi cance of this variant; however, based upon weak mammalian conservation we would lean towards a more likely benign role. -

not provided

Uncertain:1

Aug 31, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 302 of the TJP2 protein (p.Arg302Trp). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with TJP2-related conditions. ClinVar contains an entry for this variant (Variation ID: 44101). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.092

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Benign

-0.43

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.30

.;.;.;.;T;.;T;.;.;.;.;.;.;.

Eigen

Benign

-0.17

Eigen_PC

Benign

-0.27

FATHMM_MKL

Benign

0.61

LIST_S2

Uncertain

0.95

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

M_CAP

Benign

0.015

MetaRNN

Benign

0.086

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

MetaSVM

Benign

-0.92

MutationAssessor

Uncertain

2.1

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

PhyloP100

1.8

PrimateAI

Benign

0.34

PROVEAN

Benign

-2.0

.;N;.;.;.;N;N;.;.;.;N;.;N;.

REVEL

Benign

0.12

Sift

Uncertain

0.010

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

Sift4G

Uncertain

0.0030

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

Polyphen

1.0, 0.99

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

Vest4

0.28, 0.29, 0.28, 0.29, 0.33

MutPred

0.36

.;.;.;.;Loss of solvent accessibility (P = 0.0087);Loss of solvent accessibility (P = 0.0087);Loss of solvent accessibility (P = 0.0087);Loss of solvent accessibility (P = 0.0087);Loss of solvent accessibility (P = 0.0087);.;.;.;.;.;

MVP

0.65

MPC

0.60

ClinPred

0.30

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

Varity_R

0.073

gMVP

0.34

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over