9-114403950-C-A

Variant names:

• chr9-114403950-C-A
• rs1441372523
• NM_015404.4:c.2364G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_015404.4(WHRN):​c.2364G>T​(p.Arg788Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,459,194 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 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: 0.0000014 (0 hom.)
• Consequence: WHRN NM_015404.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.412
• Publications: 1 publications found

Genes affected

WHRN (HGNC:16361): (whirlin) This gene is thought to function in the organization and stabilization of sterocilia elongation and actin cystoskeletal assembly, based on studies of the related mouse gene. Mutations in this gene have been associated with autosomal recessive non-syndromic deafness and Usher Syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2016]

WHRN Gene-Disease associations (from GenCC):

• Usher syndrome type 2D

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), PanelApp Australia, Ambry Genetics, G2P
• autosomal recessive nonsyndromic hearing loss 31

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia
• nonsyndromic genetic hearing loss

  Inheritance: AR Classification: MODERATE Submitted by: ClinGen
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Usher syndrome type 2

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14456493).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
WHRN	NM_015404.4	c.2364G>T	p.Arg788Ser	missense_variant	Exon 10 of 12	ENST00000362057.4	NP_056219.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
WHRN	ENST00000362057.4	c.2364G>T	p.Arg788Ser	missense_variant	Exon 10 of 12	1	NM_015404.4	ENSP00000354623.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1459194 Hom.: 0 Cov.: 58 AF XY: 0.00000138 AC XY: 1 AN XY: 725962

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44714

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50782

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111980

Other (OTH) AF: 0.00 AC: 0 AN: 60382

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Apr 25, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Arg788Ser variant in DFNB31 has not been previously reported in individual s with hearing loss or in large population studies. Computational prediction to ols and conservation analysis suggest that the p.Arg788Ser variant may not impac t the protein, though this information is not predictive enough to rule out path ogenicity. In summary, the clinical significance of the p.Arg788Ser variant is u ncertain. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.22
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	15
DANN	Uncertain	0.99
DEOGEN2	Benign	0.12	.;.;T
Eigen	Benign	-0.27
Eigen_PC	Benign	-0.31
FATHMM_MKL	Benign	0.75	D
LIST_S2	Benign	0.84	T;T;T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.14	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.6	.;.;L
PhyloP100		0.41
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-0.79	N;N;N
REVEL	Benign	0.071
Sift	Uncertain	0.0060	D;D;D
Sift4G	Benign	0.18	T;T;D
Polyphen		0.83, 0.47	.;P;P
Vest4		0.33
MutPred		0.35		.;.;Gain of phosphorylation at R788 (P = 0.0039);
MVP		0.17
MPC		0.16
ClinPred		0.54	D
GERP RS		0.49
Varity_R		0.20
gMVP		0.31
Mutation Taster		=90/10	polymorphism

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

Other links and lift over

dbSNP: rs1441372523; hg19: chr9-117166230;