chr9-69236124-C-T

Position:

• chr9-69236124-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_004817.4(TJP2):​c.1877C>T​(p.Thr626Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000041 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T626S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: TJP2 NM_004817.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.654

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]

ENSG00000285130 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.27111024).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TJP2	NM_004817.4	c.1877C>T	p.Thr626Ile	missense_variant	13/23	ENST00000377245.9	NP_004808.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TJP2	ENST00000377245.9	c.1877C>T	p.Thr626Ile	missense_variant	13/23	1	NM_004817.4	ENSP00000366453.4
ENSG00000285130	ENST00000642889.1	c.2264C>T	p.Thr755Ile	missense_variant	15/25			ENSP00000493780.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000410 AC: 6 AN: 1461892 Hom.: 0 Cov.: 32 AF XY: 0.00000688 AC XY: 5 AN XY: 727246

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000232

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ExAC AF: 0.0000165 AC: 2

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.41	.;.;.;.;T;.;T;.;.;.;.;.;.;.
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.11
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Uncertain	0.87	D;D;D;D;.;D;D;D;D;D;D;D;D;D
M_CAP	Benign	0.0075	T
MetaRNN	Benign	0.27	T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.2	.;.;.;.;L;L;L;.;.;.;.;.;.;.
PrimateAI	Uncertain	0.67	T
PROVEAN	Uncertain	-3.1	.;D;.;.;.;D;D;.;.;.;D;.;D;.
REVEL	Benign	0.074
Sift	Benign	0.043	.;D;.;.;.;D;D;.;.;.;D;.;D;.
Sift4G	Uncertain	0.035	.;D;.;.;.;D;D;.;.;.;T;.;T;.
Polyphen		0.0060, 0.0010	.;.;.;.;B;B;B;.;.;.;.;.;.;.
Vest4		0.36, 0.30, 0.35, 0.67, 0.58
MutPred		0.48		.;.;.;.;Loss of disorder (P = 0.046);Loss of disorder (P = 0.046);Loss of disorder (P = 0.046);Loss of disorder (P = 0.046);Loss of disorder (P = 0.046);.;.;.;.;.;
MVP		0.49
MPC		0.23
ClinPred		0.95	D
GERP RS		3.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2
Varity_R		0.34
gMVP		0.37

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

Other links and lift over

dbSNP: rs149911553; hg19: chr9-71851040;