rs104893722

Positions:

• chr3-190404905-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PP3_Strong PP5

The ENST00000264734.3(CLDN16):​c.361G>A​(p.Gly121Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 31)
• Consequence: CLDN16 ENST00000264734.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.27

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a transmembrane_region Helical (size 20) in uniprot entity CLD16_HUMAN there are 6 pathogenic changes around while only 0 benign (100%) in ENST00000264734.3
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.995
• PP5: Variant 3-190404905-G-A is Pathogenic according to our data. Variant chr3-190404905-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 5927.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CLDN16	NM_006580.4	c.361G>A	p.Gly121Arg	missense_variant	3/5	ENST00000264734.3	NP_006571.2
CLDN16	NM_001378492.1	c.361G>A	p.Gly121Arg	missense_variant	7/9		NP_001365421.1
CLDN16	NM_001378493.1	c.361G>A	p.Gly121Arg	missense_variant	6/8		NP_001365422.1
CLDN16	XM_047447333.1	c.361G>A	p.Gly121Arg	missense_variant	5/7		XP_047303289.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CLDN16	ENST00000264734.3	c.361G>A	p.Gly121Arg	missense_variant	3/5	1	NM_006580.4	ENSP00000264734	P1
CLDN16	ENST00000456423.2	c.115-4998G>A		intron_variant		1		ENSP00000414136
CLDN16	ENST00000468220.1	n.553G>A		non_coding_transcript_exon_variant	5/5	4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Primary hypomagnesemia Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jul 02, 1999

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.51	D
BayesDel_noAF	Pathogenic	0.49
CADD	Pathogenic	33
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.97	D
Eigen	Pathogenic	0.94
Eigen_PC	Pathogenic	0.91
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.89	D
M_CAP	Pathogenic	0.48	D
MetaRNN	Pathogenic	1.0	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.9	M
MutationTaster	Benign	1.0	A;A
PrimateAI	Uncertain	0.63	T
PROVEAN	Pathogenic	-7.6	D
REVEL	Pathogenic	0.93
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.99
MutPred		0.96		Gain of methylation at G191 (P = 0.0108);
MVP		0.99
MPC		0.57
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.97
gMVP		0.92

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.14		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: rs104893722; hg19: chr3-190122694; COSMIC: COSV53229703;