16-89179450-G-A

Position:

• chr16-89179450-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004933.3(CDH15):​c.77G>A​(p.Arg26Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. R26R) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CDH15 NM_004933.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.368

Genes affected

CDH15 (HGNC:1754): (cadherin 15) This gene is a member of the cadherin superfamily of genes, encoding calcium-dependent intercellular adhesion glycoproteins. Cadherins consist of an extracellular domain containing 5 cadherin domains, a transmembrane region, and a conserved cytoplasmic domain. Transcripts from this particular cadherin are expressed in myoblasts and upregulated in myotubule-forming cells. The protein is thought to be essential for the control of morphogenetic processes, specifically myogenesis, and may provide a trigger for terminal muscle cell differentiation. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08240086).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CDH15	NM_004933.3	c.77G>A	p.Arg26Lys	missense_variant	2/14	ENST00000289746.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CDH15	ENST00000289746.3	c.77G>A	p.Arg26Lys	missense_variant	2/14	1	NM_004933.3	P1
CDH15	ENST00000521087.5	n.142G>A		non_coding_transcript_exon_variant	2/3	5
CDH15	ENST00000524089.1	n.142G>A		non_coding_transcript_exon_variant	2/5	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

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

Jun 09, 2022

The c.77G>A (p.R26K) alteration is located in exon 2 (coding exon 2) of the CDH15 gene. This alteration results from a G to A substitution at nucleotide position 77, causing the arginine (R) at amino acid position 26 to be replaced by a lysine (K). 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	0.093
BayesDel_addAF	Benign	-0.27	T
BayesDel_noAF	Benign	-0.63
CADD	Benign	1.5
DANN	Benign	0.68
DEOGEN2	Benign	0.050	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.072	N
LIST_S2	Benign	0.29	T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.082	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.4	L
MutationTaster	Benign	1.0	N
PrimateAI	Uncertain	0.66	T
PROVEAN	Benign	-0.040	N
REVEL	Benign	0.066
Sift	Benign	0.67	T
Sift4G	Benign	0.21	T
Polyphen		0.0	B
Vest4		0.096
MutPred		0.56		Gain of methylation at R26 (P = 0.0431);
MVP		0.55
MPC		0.031
ClinPred		0.033	T
GERP RS		1.6
Varity_R		0.039
gMVP		0.34

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

LitVar

Other links and lift over

dbSNP: rs1455748455; hg19: chr16-89245858;