chr10-54317338-A-G

Position:

• chr10-54317338-A-G

Variant summary

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

The NM_001384140.1(PCDH15):​c.809T>C​(p.Leu270Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,752 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PCDH15 NM_001384140.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.36

Genes affected

PCDH15 (HGNC:14674): (protocadherin related 15) This gene is a member of the cadherin superfamily. Family members encode integral membrane proteins that mediate calcium-dependent cell-cell adhesion. It plays an essential role in maintenance of normal retinal and cochlear function. Mutations in this gene result in hearing loss and Usher Syndrome Type IF (USH1F). Extensive alternative splicing resulting in multiple isoforms has been observed in the mouse ortholog. Similar alternatively spliced transcripts are inferred to occur in human, and additional variants are likely to occur. [provided by RefSeq, Dec 2008]

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, 0.886

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PCDH15	NM_033056.4	c.809T>C	p.Leu270Pro	missense_variant	8/33	ENST00000320301.11	NP_149045.3
PCDH15	NM_001384140.1	c.809T>C	p.Leu270Pro	missense_variant	8/38	ENST00000644397.2	NP_001371069.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PCDH15	ENST00000320301.11	c.809T>C	p.Leu270Pro	missense_variant	8/33	1	NM_033056.4	ENSP00000322604.6
PCDH15	ENST00000644397.2	c.809T>C	p.Leu270Pro	missense_variant	8/38		NM_001384140.1	ENSP00000495195.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251348 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135834

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461752 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727174

Gnomad4 AFR exome AF: 0.0000598

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 07, 2023

This sequence change replaces leucine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 270 of the PCDH15 protein (p.Leu270Pro). This variant is present in population databases (no rsID available, gnomAD no frequency). This variant has not been reported in the literature in individuals affected with PCDH15-related conditions. ClinVar contains an entry for this variant (Variation ID: 1974485). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt PCDH15 protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.20
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.083	T;.;.;.;.;T;.;.;T;.;T;.;.;T;.;T;.;.;.;.;.;.;T;.
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.93	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.89	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Benign	-0.40	T
MutationAssessor	Benign	1.8	.;.;.;.;L;.;.;.;.;.;.;L;.;.;.;.;.;.;.;.;.;.;L;L
PrimateAI	Uncertain	0.72	T
PROVEAN	Pathogenic	-5.0	D;.;.;.;.;.;D;D;.;D;.;D;D;.;D;.;.;D;D;D;.;D;D;D
REVEL	Uncertain	0.60
Sift	Uncertain	0.0010	D;.;.;.;.;.;D;D;.;D;.;D;D;.;D;.;.;D;D;D;.;D;D;D
Sift4G	Pathogenic	0.0	D;.;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
Polyphen		0.99, 1.0, 1.0, 1.0, 0.99	.;.;.;.;.;.;.;.;.;.;.;.;D;.;D;.;.;D;D;D;.;D;D;D
Vest4		0.66
MutPred		0.78		Gain of disorder (P = 0.0149);Gain of disorder (P = 0.0149);.;Gain of disorder (P = 0.0149);Gain of disorder (P = 0.0149);.;Gain of disorder (P = 0.0149);Gain of disorder (P = 0.0149);Gain of disorder (P = 0.0149);Gain of disorder (P = 0.0149);.;Gain of disorder (P = 0.0149);Gain of disorder (P = 0.0149);.;.;.;Gain of disorder (P = 0.0149);Gain of disorder (P = 0.0149);Gain of disorder (P = 0.0149);.;.;Gain of disorder (P = 0.0149);Gain of disorder (P = 0.0149);Gain of disorder (P = 0.0149);
MVP		0.88
MPC		0.087
ClinPred		0.97	D
GERP RS		4.8
Varity_R		0.94
gMVP		0.83

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: rs727503367; hg19: chr10-56077098;