7-90413297-G-T

Variant names:

• chr7-90413297-G-T
• NM_001185072.3:c.621G>T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001185072.3(CLDN12):​c.621G>T​(p.Trp207Cys) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CLDN12 NM_001185072.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.30

Genes affected

CLDN12 (HGNC:2034): (claudin 12) 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. This gene is expressed in the inner ear and bladder epithelium, and it is over-expressed in colorectal carcinomas. This protein and claudin 2 are critical for vitamin D-dependent Ca2+ absorption between enterocytes. Multiple alternatively spliced transcript variants encoding the same protein have been found.[provided by RefSeq, Sep 2011]

ENSG00000273299 (HGNC:):

ACMG classification

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, 0.911

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLDN12	NM_001185072.3	c.621G>T	p.Trp207Cys	missense_variant	Exon 4 of 4	ENST00000496677.6	NP_001172001.1
CLDN12	NM_001185073.3	c.621G>T	p.Trp207Cys	missense_variant	Exon 3 of 3		NP_001172002.1
CLDN12	NM_012129.5	c.621G>T	p.Trp207Cys	missense_variant	Exon 3 of 3		NP_036261.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLDN12	ENST00000496677.6	c.621G>T	p.Trp207Cys	missense_variant	Exon 4 of 4	1	NM_001185072.3	ENSP00000419053.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jan 20, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.621G>T (p.W207C) alteration is located in exon 4 (coding exon 1) of the CLDN12 gene. This alteration results from a G to T substitution at nucleotide position 621, causing the tryptophan (W) at amino acid position 207 to be replaced by a cysteine (C). 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	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.34	D
BayesDel_noAF	Pathogenic	0.25
CADD	Pathogenic	28
DANN	Uncertain	0.99
DEOGEN2	Benign	0.26	T;T
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.94	.;D
M_CAP	Benign	0.049	D
MetaRNN	Pathogenic	0.91	D;D
MetaSVM	Uncertain	-0.23	T
MutationAssessor	Benign	0.90	L;L
PrimateAI	Uncertain	0.64	T
PROVEAN	Uncertain	-2.4	N;N
REVEL	Uncertain	0.64
Sift	Uncertain	0.017	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.80
MutPred		0.79		Gain of glycosylation at S212 (P = 0.1328);Gain of glycosylation at S212 (P = 0.1328);
MVP		0.93
ClinPred		0.91	D
GERP RS		5.5
Varity_R		0.40
gMVP		0.91

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: chr7-90042611;