NM_153676.4:c.311G>A

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B.

PM2PM5PP3_StrongPP5_Very_Strong

The NM_153676.4(USH1C):c.311G>A(p.Gly104Asp) variant causes a missense change. The variant allele was found at a frequency of 0.00000657 in 152,218 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 Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G104R) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Consequence

USH1C
NM_153676.4 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, multiple submitters, no conflicts P:4U:1

Conservation

PhyloP100: 7.19

Publications

2 publications found

Variant links:

Genes affected

USH1C (HGNC:12597): (USH1 protein network component harmonin) This gene encodes a scaffold protein that functions in the assembly of Usher protein complexes. The protein contains PDZ domains, a coiled-coil region with a bipartite nuclear localization signal and a PEST degradation sequence. Defects in this gene are the cause of Usher syndrome type 1C and non-syndromic sensorineural deafness autosomal recessive type 18. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2009]

USH1C Gene-Disease associations (from GenCC):

Usher syndrome type 1
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
Usher syndrome type 1C
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, PanelApp Australia
autosomal recessive nonsyndromic hearing loss 18A
Inheritance: AR, Unknown Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
nonsyndromic genetic hearing loss
Inheritance: AR Classification: LIMITED Submitted by: ClinGen

USH1C links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr11-17531231-C-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1301502.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.982

PP5

Variant 11-17531230-C-T is Pathogenic according to our data. Variant chr11-17531230-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 554093.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
USH1C	NM_153676.4 link	c.311G>A	p.Gly104Asp	missense_variant	Exon 4 of 27	ENST00000005226.12	NP_710142.1	Q9Y6N9-5
USH1C	NM_005709.4 link	c.311G>A	p.Gly104Asp	missense_variant	Exon 4 of 21	ENST00000318024.9	NP_005700.2	Q9Y6N9-1A0A0S2Z4U9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
USH1C	ENST00000005226.12 link	c.311G>A	p.Gly104Asp	missense_variant	Exon 4 of 27	5	NM_153676.4	ENSP00000005226.7		Q9Y6N9-5
USH1C	ENST00000318024.9 link	c.311G>A	p.Gly104Asp	missense_variant	Exon 4 of 21	1	NM_005709.4	ENSP00000317018.4		Q9Y6N9-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152218

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74366

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

41458

American (AMR)

AF:

0.00

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000193

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68044

Other (OTH)

AF:

0.00

AC:

AN:

2090

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:4Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal recessive nonsyndromic hearing loss 18A

Pathogenic:2

Mar 10, 2024

Baylor Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jul 17, 2023

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as Likely Pathogenic. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with autosomal recessive deafness 18A (MIM#602092) and Usher syndrome, type 1C (MIM#276904). Dominant negative is a suggested mechanism for rare autosomal dominant non-syndromic hearing loss (NSHL) (PMID: 31858762). (I) 0106 - This gene is associated with autosomal recessive disease. A single, large family with a heterozygous missense variant has been reported with autosomal dominant NSHL (PMID: 31858762). (I) 0200 - Variant is predicted to result in a missense amino acid change from glycine to aspartic acid. (I) 0251 - This variant is heterozygous. (I) 0304 - Variant is present in gnomAD (v2, v3) <0.01 for a recessive condition (1 heterozygote, 0 homozygotes). (SP) 0309 - An alternative amino acid change at the same position has been observed in gnomAD (v3) (2 heterozygotes, 0 homozygotes). (I) 0502 - Missense variant with conflicting in silico predictions and uninformative conservation. (I) 0600 - Variant is located in the annotated PDZ 1 domain (NCBI, UniProt). (I) 0710 - Another missense variant comparable to the one identified in this case has inconclusive previous evidence for pathogenicity. This variant has been classified as a VUS due to insufficient information (deafnessvariationdatabase). (I) 0808 - Previous reports of pathogenicity for this variant are conflicting. This variant has been classified as likely pathogenic, pathogenic, a VUS and likely benign (LOVD, ClinVar, deafnessvariationdatabase). However, it has also been observed in two unrelated compound heterozygous individuals, and a homozygous individual with Usher syndrome (PMID: 24498627, PMID: 25356976, PMID: 33095980). (I) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1201 - Heterozygous variant detected in trans with a second likely pathogenic heterozygous variant (c.388-1G>A) in a recessive disease. (SP) 1205 - This variant has been shown to be maternally inherited (by trio analysis). (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

Usher syndrome type 1

Pathogenic:1

Baylor Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Pathogenic:1

Feb 12, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 104 of the USH1C protein (p.Gly104Asp). This variant is present in population databases (no rsID available, gnomAD 0.06%). This missense change has been observed in individual(s) with Usher syndrome (PMID: 24498627, 25356976, 33095980). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 554093). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -

Usher syndrome type 1C;C1865870:Autosomal recessive nonsyndromic hearing loss 18A

Uncertain:1

Sep 26, 2017

Counsyl

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

1.0

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Uncertain

0.12

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.44

T;.;.;.;T

Eigen

Pathogenic

0.80

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Uncertain

0.97

LIST_S2

Pathogenic

0.98

D;D;D;D;D

M_CAP

Uncertain

0.29

MetaRNN

Pathogenic

0.98

D;D;D;D;D

MetaSVM

Benign

-0.66

MutationAssessor

Benign

1.9

L;.;L;L;.

PhyloP100

7.2

PrimateAI

Pathogenic

0.84

PROVEAN

Pathogenic

-6.5

D;D;D;D;D

REVEL

Pathogenic

0.90

Sift

Uncertain

0.0010

D;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;.

Polyphen

1.0

D;.;D;.;.

Vest4

0.98

MutPred

0.88

Loss of methylation at R103 (P = 0.0407);.;Loss of methylation at R103 (P = 0.0407);Loss of methylation at R103 (P = 0.0407);.;

MVP

0.61

MPC

0.44

ClinPred

1.0

GERP RS

5.4

Varity_R

0.96

gMVP

0.87

Mutation Taster

=1/99

disease causing (ClinVar)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over