rs148718874
Variant summary
Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2
The NM_033056.4(PCDH15):c.4812G>T(p.Arg1604Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000638 in 1,614,108 control chromosomes in the GnomAD database, including 16 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1604G) has been classified as Likely benign.
Frequency
Consequence
NM_033056.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -20 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
PCDH15 | ENST00000320301.11 | c.4812G>T | p.Arg1604Ser | missense_variant | Exon 33 of 33 | 1 | NM_033056.4 | ENSP00000322604.6 | ||
PCDH15 | ENST00000644397.2 | c.4368-2684G>T | intron_variant | Intron 32 of 37 | NM_001384140.1 | ENSP00000495195.1 |
Frequencies
GnomAD3 genomes AF: 0.000881 AC: 134AN: 152146Hom.: 1 Cov.: 32
GnomAD3 exomes AF: 0.00210 AC: 529AN: 251356Hom.: 12 AF XY: 0.00186 AC XY: 252AN XY: 135848
GnomAD4 exome AF: 0.000614 AC: 897AN: 1461844Hom.: 15 Cov.: 33 AF XY: 0.000568 AC XY: 413AN XY: 727220
GnomAD4 genome AF: 0.000867 AC: 132AN: 152264Hom.: 1 Cov.: 32 AF XY: 0.000873 AC XY: 65AN XY: 74452
ClinVar
Submissions by phenotype
not provided Benign:4
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This variant is associated with the following publications: (PMID: 26166082, 29625443, 31180159, 33090715) -
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PCDH15: BP4, BS1, BS2 -
not specified Benign:2
p.Arg1604Ser in exon 33 of PCDH15: This variant is not expected to have clinical significance because it has been identified in 2.75% (238/8654) of East Asian c hromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute .org; rs148718874). -
Variant summary: PCDH15 c.4812G>T (p.Arg1604Ser) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0021 in 251356 control chromosomes, predominantly at a frequency of 0.028 within the East Asian subpopulation in the gnomAD database, including 12 homozygotes. The observed variant frequency within East Asian control individuals in the gnomAD database is approximately 9 fold of the estimated maximal expected allele frequency for a pathogenic variant in PCDH15 causing Usher Syndrome Type 1F phenotype (0.0032), strongly suggesting that the variant is a benign polymorphism found primarily in populations of East Asian origin. c.4812G>T has been reported in the literature in individuals affected with poor cochlear implants outcome and vestibular dysfunction (examples: Wu_2015 and Guan_2021) and one of these reports classified the variant as VUS (Guan_2021). These report(s) do not provide unequivocal conclusions about association of the variant with Usher Syndrome Type 1F. The following publications have been ascertained in the context of this evaluation (PMID: 26166082, 34416374). Seven submitters have cited clinical-significance assessments for this variant to ClinVar after 2014 and classified the variant as VUS (n=1) and benign/ likely benign (n=6). Based on the evidence outlined above, the variant was classified as likely benign. -
Autosomal recessive nonsyndromic hearing loss 23 Uncertain:1
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Usher syndrome type 1D;C1836027:Autosomal recessive nonsyndromic hearing loss 23;C1865885:Usher syndrome type 1F Benign:1
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Usher syndrome type 1F Benign:1
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Usher syndrome type 1 Benign:1
This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at