Genetic Variant TJP2:p.Asp482Asp (chr9-69228107-C-T) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_004817.4(TJP2):c.1446C>T(p.Asp482Asp) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000687 in 1,454,980 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

TJP2
NM_004817.4 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.100

Publications

46 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:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.8).

BP7

Synonymous conserved (PhyloP=-0.1 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TJP2	NM_004817.4 link	c.1446C>T	p.Asp482Asp	synonymous_variant	Exon 9 of 23	ENST00000377245.9	NP_004808.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TJP2	ENST00000377245.9 link	c.1446C>T	p.Asp482Asp	synonymous_variant	Exon 9 of 23	1	NM_004817.4	ENSP00000366453.4
ENSG00000285130	ENST00000642889.1 link	c.1833C>T	p.Asp611Asp	synonymous_variant	Exon 11 of 25			ENSP00000493780.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.87e-7

AC:

AN:

1454980

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

722990

show subpopulations

African (AFR)

AF:

0.0000300

AC:

AN:

33326

American (AMR)

AF:

0.00

AC:

AN:

43508

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25980

East Asian (EAS)

AF:

0.00

AC:

AN:

39522

South Asian (SAS)

AF:

0.00

AC:

AN:

85144

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53068

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1108478

Other (OTH)

AF:

0.00

AC:

AN:

60192

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

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

Cov.:

Alfa

AF:

0.00

Hom.:

153473

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.80

CADD

Benign

3.0

(source)

DANN

Benign

0.29

PhyloP100

-0.10

PromoterAI

-0.00070

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over