chr8-8702461-C-G
Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The NM_194284.3(CLDN23):c.63C>G(p.Asn21Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000207 in 1,452,780 control chromosomes in the GnomAD database, with no homozygous occurrence. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 33)
Exomes 𝑓: 0.0000021 ( 0 hom. )
Consequence
CLDN23
NM_194284.3 missense
NM_194284.3 missense
Scores
2
2
14
Clinical Significance
Conservation
PhyloP100: 0.655
Genes affected
CLDN23 (HGNC:17591): (claudin 23) 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 germinal center B-cells, placenta and stomach as well as in colon tumor. This gene is down-regulated in intestinal type gastric cancer. [provided by RefSeq, Aug 2010]
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ACMG classification
Classification made for transcript
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/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CLDN23 | NM_194284.3 | c.63C>G | p.Asn21Lys | missense_variant | 1/1 | ENST00000519106.2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CLDN23 | ENST00000519106.2 | c.63C>G | p.Asn21Lys | missense_variant | 1/1 | NM_194284.3 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD4 exome AF: 0.00000207 AC: 3AN: 1452780Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1AN XY: 722330
GnomAD4 exome
AF:
AC:
3
AN:
1452780
Hom.:
Cov.:
33
AF XY:
AC XY:
1
AN XY:
722330
Gnomad4 AFR exome
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GnomAD4 genome ? Cov.: 33
GnomAD4 genome
?
Cov.:
33
Bravo
AF:
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 | Oct 22, 2021 | The c.63C>G (p.N21K) alteration is located in exon 1 (coding exon 1) of the CLDN23 gene. This alteration results from a C to G substitution at nucleotide position 63, causing the asparagine (N) at amino acid position 21 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
Cadd
Benign
Dann
Benign
DEOGEN2
Benign
T
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Benign
D
M_CAP
Pathogenic
D
MetaRNN
Uncertain
D
MetaSVM
Benign
T
MutationAssessor
Benign
L
MutationTaster
Benign
N
PrimateAI
Uncertain
T
PROVEAN
Benign
N
REVEL
Benign
Sift
Benign
T
Sift4G
Benign
T
Polyphen
P
Vest4
MutPred
Gain of ubiquitination at N21 (P = 0.0238);
MVP
MPC
ClinPred
T
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at