chr17-74920027-G-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_173477.5(USH1G):c.809C>A(p.Ala270Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000754 in 1,459,022 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000075 ( 0 hom. )

Consequence

USH1G
NM_173477.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 3.31

Publications

0 publications found

Variant links:

Genes affected

USH1G (HGNC:16356): (USH1 protein network component sans) This gene encodes a protein that contains three ankyrin domains, a class I PDZ-binding motif and a sterile alpha motif. The encoded protein interacts with harmonin, which is associated with Usher syndrome type 1C. This protein plays a role in the development and maintenance of the auditory and visual systems and functions in the cohesion of hair bundles formed by inner ear sensory cells. Mutations in this gene are associated with Usher syndrome type 1G (USH1G). Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2013]

USH1G Gene-Disease associations (from GenCC):

Usher syndrome type 1
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
Usher syndrome type 1G
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine
nonsyndromic genetic hearing loss
Inheritance: AR Classification: NO_KNOWN Submitted by: ClinGen

USH1G links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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=0.14613622).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
USH1G	NM_173477.5 link	c.809C>A	p.Ala270Asp	missense_variant	Exon 2 of 3	ENST00000614341.5	NP_775748.2
USH1G	NM_001282489.3 link	c.500C>A	p.Ala167Asp	missense_variant	Exon 2 of 3		NP_001269418.1	Q495M9B4DL95
USH1G	XM_011524296.2 link	c.500C>A	p.Ala167Asp	missense_variant	Exon 2 of 3		XP_011522598.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
USH1G	ENST00000614341.5 link	c.809C>A	p.Ala270Asp	missense_variant	Exon 2 of 3	1	NM_173477.5	ENSP00000480279.1	Q495M9
USH1G	ENST00000579243.1 link	n.*408C>A		non_coding_transcript_exon_variant	Exon 2 of 3	2		ENSP00000462568.1	J3KSN5
USH1G	ENST00000579243.1 link	n.*408C>A		3_prime_UTR_variant	Exon 2 of 3	2		ENSP00000462568.1	J3KSN5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000122

AC:

AN:

246032

AF XY:

0.0000224

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000179

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000754

AC:

AN:

1459022

Hom.:

Cov.:

AF XY:

0.00000827

AC XY:

AN XY:

725922

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33464

American (AMR)

AF:

0.0000224

AC:

AN:

44702

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26110

East Asian (EAS)

AF:

0.00

AC:

AN:

39682

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50988

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000810

AC:

AN:

1111696

Other (OTH)

AF:

0.0000166

AC:

AN:

60356

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.00000825

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Dec 12, 2024

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Jul 18, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces alanine with aspartic acid at codon 270 of the USH1G protein (p.Ala270Asp). The alanine residue is weakly conserved and there is a moderate physicochemical difference between alanine and aspartic acid. This variant is present in population databases (rs755287596, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with USH1G-related conditions. ClinVar contains an entry for this variant (Variation ID: 229610). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available"). 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. -

not specified

Uncertain:1

Dec 21, 2015

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Ala270Asp variant in USH1G has not been previously reported in patients wi th hearing loss or Usher syndrome but has been identified in 1/64350 of European chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitu te.org; dbSNP rs755287596). This frequency is not high enough to rule out a path ogenic role. Computational prediction tools and conservation analysis do not pro vide strong support for or against an impact the protein. In summary, the clinic al significance of the p.Ala270Asp variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.036

BayesDel_noAF

Benign

-0.21

CADD

Benign

(source)

DANN

Benign

0.94

DEOGEN2

Benign

0.072

Eigen

Benign

-0.34

Eigen_PC

Benign

-0.12

FATHMM_MKL

Uncertain

0.82

LIST_S2

Uncertain

0.87

M_CAP

Benign

0.0085

MetaRNN

Benign

0.15

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.90

PhyloP100

3.3

PrimateAI

Benign

0.48

Sift4G

Benign

0.62

Polyphen

0.0020

Vest4

0.29

MutPred

0.46

Gain of loop (P = 3e-04);

MVP

0.52

ClinPred

0.14

GERP RS

4.3

Varity_R

0.11

gMVP

0.70

Mutation Taster

=62/38

polymorphism

(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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chr17-74920027-G-T

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