rs727504805

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1PM2

The NM_206933.4(USH2A):c.1648G>C(p.Asp550His) variant causes a missense change. The variant allele was found at a frequency of 0.0000322 in 1,613,524 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. D550D) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

USH2A
NM_206933.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:6

Conservation

PhyloP100: 3.97

Variant links:

Genes affected

USH2A (HGNC:12601): (usherin) This gene encodes a protein that contains laminin EGF motifs, a pentaxin domain, and many fibronectin type III motifs. The protein is found in the basement membrane, and may be important in development and homeostasis of the inner ear and retina. Mutations within this gene have been associated with Usher syndrome type IIa and retinitis pigmentosa. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2008]

USH2A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM1

In a domain Laminin EGF-like 1 (size 56) in uniprot entity USH2A_HUMAN there are 28 pathogenic changes around while only 2 benign (93%) in NM_206933.4

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
USH2A	NM_206933.4 linkuse as main transcript	c.1648G>C	p.Asp550His	missense_variant	10/72	ENST00000307340.8
USH2A	NM_007123.6 linkuse as main transcript	c.1648G>C	p.Asp550His	missense_variant	10/21

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
USH2A	ENST00000307340.8 linkuse as main transcript	c.1648G>C	p.Asp550His	missense_variant	10/72	1	NM_206933.4	P1	O75445-1
USH2A	ENST00000366942.3 linkuse as main transcript	c.1648G>C	p.Asp550His	missense_variant	10/21	1			O75445-2
USH2A	ENST00000674083.1 linkuse as main transcript	c.1648G>C	p.Asp550His	missense_variant	10/73				O75445-3

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152154

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:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000519

AC:

AN:

250652

Hom.:

AF XY:

0.0000812

AC XY:

AN XY:

135492

show subpopulations

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:

0.000425

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000342

AC:

AN:

1461370

Hom.:

Cov.:

AF XY:

0.0000550

AC XY:

AN XY:

726994

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000546

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152154

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74314

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000659

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Usher syndrome type 2A

Uncertain:2

Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Aug 03, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Nov 04, 2023	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Feb 23, 2015

proposed classification - variant undergoing re-assessment, contact laboratory -

Usher syndrome type 2A;C3151138:Retinitis pigmentosa 39

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

Apr 21, 2017

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jun 27, 2022

This sequence change replaces aspartic acid, which is acidic and polar, with histidine, which is basic and polar, at codon 550 of the USH2A protein (p.Asp550His). This variant is present in population databases (rs727504805, gnomAD 0.04%). This variant has not been reported in the literature in individuals affected with USH2A-related conditions. ClinVar contains an entry for this variant (Variation ID: 179343). 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: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). 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. -

Retinitis pigmentosa 39

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Nov 04, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Uncertain

-0.070

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Benign

0.35

T;.

Eigen

Uncertain

0.38

Eigen_PC

Uncertain

0.39

FATHMM_MKL

Uncertain

0.96

LIST_S2

Benign

0.84

T;T

M_CAP

Uncertain

0.099

MetaRNN

Uncertain

0.56

D;D

MetaSVM

Uncertain

0.092

MutationAssessor

Uncertain

2.3

M;M

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.36

PROVEAN

Uncertain

-3.4

D;D

REVEL

Uncertain

0.39

Sift

Uncertain

0.011

D;D

Sift4G

Uncertain

0.0050

D;D

Polyphen

1.0

D;B

Vest4

0.57

MutPred

0.66

Loss of disorder (P = 0.1521);Loss of disorder (P = 0.1521);

MVP

0.93

MPC

0.044

ClinPred

0.39

GERP RS

4.5

Varity_R

0.69

gMVP

0.73

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over