4-183322307-T-A

Variant names:

• chr4-183322307-T-A
• NM_001185149.1:c.120A>T

Variant summary

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

The NM_001185149.1(CLDN24):​c.120A>T​(p.Leu40Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CLDN24 NM_001185149.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0130

Genes affected

CLDN24 (HGNC:37200): (claudin 24) 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. The protein encoded by this gene is 75% identical to the mouse homolog. This gene is upstream of the CLDN22 gene, which overlaps the WWC2 gene on the opposite strand in the genome.[provided by RefSeq, Aug 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLDN24	NM_001185149.1	c.120A>T	p.Leu40Phe	missense_variant	Exon 1 of 1	ENST00000541814.1	NP_001172078.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLDN24	ENST00000541814.1	c.120A>T	p.Leu40Phe	missense_variant	Exon 1 of 1	6	NM_001185149.1	ENSP00000438400.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Oct 19, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.120A>T (p.L40F) alteration is located in exon 1 (coding exon 1) of the CLDN24 gene. This alteration results from a A to T substitution at nucleotide position 120, causing the leucine (L) at amino acid position 40 to be replaced by a phenylalanine (F). 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	Uncertain	0.53
BayesDel_addAF	Uncertain	0.090	D
BayesDel_noAF	Benign	-0.11
CADD	Benign	19
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.55	D
Eigen	Benign	-0.51
Eigen_PC	Benign	-0.67
FATHMM_MKL	Benign	0.53	D
LIST_S2	Uncertain	0.94	D
M_CAP	Uncertain	0.14	D
MetaRNN	Uncertain	0.73	D
MetaSVM	Uncertain	0.31	D
MutationAssessor	Pathogenic	3.3	M
PrimateAI	Uncertain	0.62	T
PROVEAN	Uncertain	-3.2	D
REVEL	Uncertain	0.59
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.038	D
Vest4		0.69
MutPred		0.69		Gain of solvent accessibility (P = 0.0044);
MVP		0.37
MPC		1.7
ClinPred		0.98	D
GERP RS		-4.1
Varity_R		0.48
gMVP		0.065

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr4-184243460;