20-59984647-A-G

Position:

• chr20-59984647-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_177980.4(CDH26):​c.550A>G​(p.Ile184Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000481 in 1,455,496 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 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: 0.0000048 (0 hom.)
• Consequence: CDH26 NM_177980.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.03

Genes affected

CDH26 (HGNC:15902): (cadherin 26) This gene encodes a member of the cadherin protein family. Cadherins are a family of calcium-dependent adhesion molecules that mediate cell-cell adhesion in all solid tissues and modulate a wide variety of processes, including cell polarization, migration and differentiation. Cadherin domains occur as repeats in the extracellular region and are thought to contribute to the sorting of heterogeneous cell types and the maintenance of orderly structures such as epithelium. This protein is expressed in gastrointestinal epithelial cells and may be upregulated during allergic inflammation. This protein interacts with alpha integrins and may also be involved in leukocyte migration and adhesion. [provided by RefSeq, Jan 2017]

CDH26 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.030254364).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CDH26	NM_177980.4	c.550A>G	p.Ile184Val	missense_variant	6/18	ENST00000348616.9	NP_817089.1
CDH26	NR_145482.2	n.872A>G		non_coding_transcript_exon_variant	6/18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CDH26	ENST00000348616.9	c.550A>G	p.Ile184Val	missense_variant	6/18	2	NM_177980.4	ENSP00000339390.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000481 AC: 7 AN: 1455496 Hom.: 0 Cov.: 31 AF XY: 0.00000691 AC XY: 5 AN XY: 723810

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: 0.00000540

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 01, 2024

The c.550A>G (p.I184V) alteration is located in exon 6 (coding exon 6) of the CDH26 gene. This alteration results from a A to G substitution at nucleotide position 550, causing the isoleucine (I) at amino acid position 184 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	0.079
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.55
CADD	Benign	0.0090
DANN	Benign	0.21
DEOGEN2	Benign	0.015	T
Eigen	Benign	-1.7
Eigen_PC	Benign	-1.8
FATHMM_MKL	Benign	0.011	N
LIST_S2	Benign	0.33	T
M_CAP	Benign	0.0059	T
MetaRNN	Benign	0.030	T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	0.14	N
PrimateAI	Benign	0.28	T
PROVEAN	Benign	0.060	N
REVEL	Benign	0.092
Sift	Benign	0.91	T
Sift4G	Benign	0.12	T
Vest4		0.053
MutPred		0.58		Loss of sheet (P = 0.1158);
MVP		0.17
MPC		0.11
ClinPred		0.028	T
GERP RS		-5.9
Varity_R		0.023
gMVP		0.22

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: chr20-58559702;