6-155275958-C-T

Position:

chr6-155275958-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_001001346.3(CLDN20):c.239C>T(p.Ala80Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000141 in 1,614,038 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

CLDN20
NM_001001346.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.57

Variant links:

Genes affected

CLDN20 (HGNC:2042): (claudin 20) This gene encodes a member of the claudin family. Claudins are integral membrane proteins and components of tight junction strands. Tight junction strands serve as a physical barrier to prevent solutes and water from passing freely through the paracellular space between epithelial or endothelial cell sheets, and also play critical roles in maintaining cell polarity and signal transductions. [provided by RefSeq, Jun 2010]

CLDN20 links:

TFB1M (HGNC:17037): (transcription factor B1, mitochondrial) The protein encoded by this gene is a dimethyltransferase that methylates the conserved stem loop of mitochondrial 12S rRNA. The encoded protein also is part of the basal mitochondrial transcription complex and is necessary for mitochondrial gene expression. The methylation and transcriptional activities of this protein are independent of one another. Variations in this gene may influence the severity of aminoglycoside-induced deafness (AID).[provided by RefSeq, Aug 2010]

TFB1M links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.884

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CLDN20	NM_001001346.3 linkuse as main transcript	c.239C>T	p.Ala80Val	missense_variant	2/2	ENST00000367165.3	NP_001001346.1
TFB1M	NM_016020.4 linkuse as main transcript	c.666+9200G>A		intron_variant		ENST00000367166.5	NP_057104.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CLDN20	ENST00000367165.3 linkuse as main transcript	c.239C>T	p.Ala80Val	missense_variant	2/2	1	NM_001001346.3	ENSP00000356133	P1
TFB1M	ENST00000367166.5 linkuse as main transcript	c.666+9200G>A		intron_variant		1	NM_016020.4	ENSP00000356134	P1

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152146

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000471

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000162

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000143

AC:

AN:

251392

Hom.:

AF XY:

0.000132

AC XY:

AN XY:

135866

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000462

Gnomad NFE exome

AF:

0.000220

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000144

AC:

210

AN:

1461892

Hom.:

Cov.:

AF XY:

0.000146

AC XY:

106

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.000337

Gnomad4 NFE exome

AF:

0.000165

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000118

AC:

AN:

152146

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74316

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000471

Gnomad4 NFE

AF:

0.000162

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000169

Hom.:

Bravo

AF:

0.000117

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000148

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 23, 2023

The c.239C>T (p.A80V) alteration is located in exon 2 (coding exon 1) of the CLDN20 gene. This alteration results from a C to T substitution at nucleotide position 239, causing the alanine (A) at amino acid position 80 to be replaced by a valine (V). 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

0.31

BayesDel_addAF

Uncertain

0.15

BayesDel_noAF

Pathogenic

0.27

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.62

Eigen

Pathogenic

0.90

Eigen_PC

Pathogenic

0.83

FATHMM_MKL

Uncertain

0.96

LIST_S2

Benign

0.84

M_CAP

Pathogenic

0.29

MetaRNN

Pathogenic

0.88

MetaSVM

Pathogenic

0.83

MutationAssessor

Pathogenic

3.0

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.58

PROVEAN

Uncertain

-3.0

REVEL

Pathogenic

0.76

Sift

Uncertain

0.0030

Sift4G

Uncertain

0.014

Polyphen

1.0

Vest4

0.78

MVP

0.93

MPC

0.18

ClinPred

0.57

GERP RS

5.4

Varity_R

0.73

gMVP

0.74

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