3-190388117-A-T

Position:

chr3-190388117-A-T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting

The NM_001378492.1(CLDN16):c.-93-120A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000429 in 1,613,746 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0021 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00025 ( 1 hom. )

Consequence

CLDN16
NM_001378492.1 intron

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2B:1

Conservation

PhyloP100: 1.83

Variant links:

Genes affected

CLDN16 (HGNC:2037): (claudin 16) Tight junctions represent one mode of cell-to-cell adhesion in epithelial or endothelial cell sheets, forming continuous seals around cells and serving as a physical barrier to prevent solutes and water from passing freely through the paracellular space. These junctions are comprised of sets of continuous networking strands in the outwardly facing cytoplasmic leaflet, with complementary grooves in the inwardly facing extracytoplasmic leaflet. The protein encoded by this gene, a member of the claudin family, is an integral membrane protein and a component of tight junction strands. It is found primarily in the kidneys, specifically in the thick ascending limb of Henle, where it acts as either an intercellular pore or ion concentration sensor to regulate the paracellular resorption of magnesium ions. Defects in this gene are a cause of primary hypomagnesemia, which is characterized by massive renal magnesium wasting with hypomagnesemia and hypercalciuria, resulting in nephrocalcinosis and renal failure. This gene and the CLDN1 gene are clustered on chromosome 3q28. [provided by RefSeq, Jun 2010]

CLDN16 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.53).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00212 (323/152190) while in subpopulation AFR AF= 0.00756 (314/41536). AF 95% confidence interval is 0.00687. There are 0 homozygotes in gnomad4. There are 159 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	MANE
CLDN16	NM_001378492.1 linkuse as main transcript	c.-93-120A>T	intron_variant
CLDN16	NM_001378493.1 linkuse as main transcript	c.-93-120A>T	intron_variant
CLDN16	XM_047447333.1 linkuse as main transcript	c.-93-120A>T	intron_variant
CLDN16	NM_006580.4 linkuse as main transcript		upstream_gene_variant	ENST00000264734.3

Ensembl

Gene	Transcript	HGVSc	Effect	TSL	MANE	Appris
CLDN16	ENST00000468220.1 linkuse as main transcript	n.306+13514A>T	intron_variant, non_coding_transcript_variant	4
CLDN16	ENST00000264734.3 linkuse as main transcript		upstream_gene_variant	1	NM_006580.4	P1
CLDN16	ENST00000456423.2 linkuse as main transcript		upstream_gene_variant	1

Frequencies

GnomAD3 genomes

AF:

0.00213

AC:

324

AN:

152072

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00761

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

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:

0.0000735

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000523

AC:

131

AN:

250532

Hom.:

AF XY:

0.000347

AC XY:

AN XY:

135418

show subpopulations

Gnomad AFR exome

AF:

0.00715

Gnomad AMR exome

AF:

0.000348

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000252

AC:

369

AN:

1461556

Hom.:

Cov.:

AF XY:

0.000231

AC XY:

168

AN XY:

727078

show subpopulations

Gnomad4 AFR exome

AF:

0.00801

Gnomad4 AMR exome

AF:

0.000335

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:

0.0000459

Gnomad4 OTH exome

AF:

0.000497

GnomAD4 genome

AF:

0.00212

AC:

323

AN:

152190

Hom.:

Cov.:

AF XY:

0.00214

AC XY:

159

AN XY:

74408

show subpopulations

Gnomad4 AFR

AF:

0.00756

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000625

Hom.:

Bravo

AF:

0.00235

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Primary hypomagnesemia

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Aug 23, 2022

Nucleotide substitution has no predicted effect on splicing and is not conserved across species; Has not been previously published as pathogenic or benign to our knowledge -

CLDN16-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 27, 2020

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

BayesDel_noAF

Benign

-0.53

CADD

Benign

DANN

Benign

0.92

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over