Genetic Variant CLDN34:p.Ala137Val (chrX-9967767-C-T) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001195081.2(CLDN34):c.410C>T(p.Ala137Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000893 in 1,153,495 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 30 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 9/13 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000098 ( 0 hom., 2 hem., cov: 23)

Exomes 𝑓: 0.000088 ( 0 hom. 28 hem. )

Consequence

CLDN34
NM_001195081.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.29

Variant links:

Genes affected

CLDN34 (HGNC:51259): (claudin 34) Predicted to enable structural molecule activity. Predicted to be involved in bicellular tight junction assembly and cell adhesion. Predicted to be integral component of membrane. Predicted to be active in bicellular tight junction and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

CLDN34 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.26293206).

BS2

High Hemizygotes in GnomAd4 at 2 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLDN34	NM_001195081.2 link	c.410C>T	p.Ala137Val	missense_variant	Exon 1 of 1	ENST00000445307.4	NP_001182010.1	H7C241

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLDN34	ENST00000445307.4 link	c.410C>T	p.Ala137Val	missense_variant	Exon 1 of 1	6	NM_001195081.2	ENSP00000403980.3		H7C241

Frequencies

GnomAD3 genomes

AF:

0.0000984

AC:

AN:

111745

Hom.:

Cov.:

AF XY:

0.0000590

AC XY:

AN XY:

33911

show subpopulations

Gnomad AFR

AF:

0.0000976

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.000150

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000307

AC:

AN:

97768

Hom.:

AF XY:

0.0000274

AC XY:

AN XY:

36512

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.0000523

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.0000883

AC:

AN:

1041750

Hom.:

Cov.:

AF XY:

0.0000822

AC XY:

AN XY:

340782

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000989

Gnomad4 OTH exome

AF:

0.000248

GnomAD4 genome

AF:

0.0000984

AC:

AN:

111745

Hom.:

Cov.:

AF XY:

0.0000590

AC XY:

AN XY:

33911

show subpopulations

Gnomad4 AFR

AF:

0.0000976

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000150

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000680

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 14, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.410C>T (p.A137V) alteration is located in exon 1 (coding exon 1) of the CLDN34 gene. This alteration results from a C to T substitution at nucleotide position 410, causing the alanine (A) at amino acid position 137 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

0.29

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Benign

-0.24

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.15

FATHMM_MKL

Benign

0.50

LIST_S2

Benign

0.39

MetaRNN

Benign

0.26

MetaSVM

Uncertain

-0.15

PrimateAI

Benign

0.27

REVEL

Benign

0.10

Sift4G

Uncertain

0.014

Vest4

0.39

MVP

0.11

ClinPred

0.86

GERP RS

3.8

Varity_R

0.088

gMVP

0.79

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

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