15-29708973-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001330239.4(TJP1):c.4436A>G(p.Gln1479Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000274 in 1,461,884 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: TJP1 NM_001330239.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.05

Genes affected

TJP1 (HGNC:11827): (tight junction protein 1) This gene encodes a member of the membrane-associated guanylate kinase (MAGUK) family of proteins, and acts as a tight junction adaptor protein that also regulates adherens junctions. Tight junctions regulate the movement of ions and macromolecules between endothelial and epithelial cells. The multidomain structure of this scaffold protein, including a postsynaptic density 95/disc-large/zona occludens (PDZ) domain, a Src homology (SH3) domain, a guanylate kinase (GuK) domain and unique (U) motifs all help to co-ordinate binding of transmembrane proteins, cytosolic proteins, and F-actin, which are required for tight junction function. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14082628).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TJP1	NM_001330239.4	c.4436A>G	p.Gln1479Arg	missense_variant	25/28	ENST00000614355.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TJP1	ENST00000614355.5	c.4436A>G	p.Gln1479Arg	missense_variant	25/28	5	NM_001330239.4	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461884 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 727246

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 23, 2023

The c.4436A>G (p.Q1479R) alteration is located in exon 25 (coding exon 25) of the TJP1 gene. This alteration results from a A to G substitution at nucleotide position 4436, causing the glutamine (Q) at amino acid position 1479 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
Cadd	Benign	23
Dann	Uncertain	0.99
DEOGEN2	Benign	0.20	T;T;.;T;.
Eigen	Benign	-0.072
Eigen_PC	Benign	0.020
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.94	D;D;D;D;D
M_CAP	Benign	0.0099	T
MetaRNN	Benign	0.14	T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.0	L;.;.;.;.
MutationTaster	Benign	0.77	N;N;N;N
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-0.77	N;N;N;.;N
REVEL	Benign	0.041
Sift	Uncertain	0.0090	D;D;D;.;D
Sift4G	Benign	0.69	T;T;T;T;T
Polyphen		0.054	B;P;.;.;B
Vest4		0.35
MutPred		0.18		Loss of ubiquitination at K1481 (P = 0.0229);.;Loss of ubiquitination at K1481 (P = 0.0229);.;.;
MVP		0.14
MPC		0.090
ClinPred		0.38	T
GERP RS		3.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.080
gMVP		0.26

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr15-30001177;