rs150900847
Positions:
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1PM2
The NM_206933.4(USH2A):āc.12667T>Cā(p.Phe4223Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000632 in 1,614,016 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (ā ā ). Synonymous variant affecting the same amino acid position (i.e. F4223F) has been classified as Likely benign.
Frequency
Genomes: š 0.000046 ( 0 hom., cov: 32)
Exomes š: 0.000065 ( 0 hom. )
Consequence
USH2A
NM_206933.4 missense
NM_206933.4 missense
Scores
2
5
12
Clinical Significance
Conservation
PhyloP100: 4.13
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]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 4 ACMG points.
PM1
?
In a domain Fibronectin type-III 27 (size 104) in uniprot entity USH2A_HUMAN there are 33 pathogenic changes around while only 13 benign (72%) 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 | c.12667T>C | p.Phe4223Leu | missense_variant | 63/72 | ENST00000307340.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
USH2A | ENST00000307340.8 | c.12667T>C | p.Phe4223Leu | missense_variant | 63/72 | 1 | NM_206933.4 | P1 | |
USH2A | ENST00000674083.1 | c.12667T>C | p.Phe4223Leu | missense_variant | 63/73 |
Frequencies
GnomAD3 genomes ? AF: 0.0000460 AC: 7AN: 152174Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.0000320 AC: 8AN: 250146Hom.: 0 AF XY: 0.0000296 AC XY: 4AN XY: 135160
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GnomAD4 exome AF: 0.0000650 AC: 95AN: 1461842Hom.: 0 Cov.: 37 AF XY: 0.0000550 AC XY: 40AN XY: 727224
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GnomAD4 genome ? AF: 0.0000460 AC: 7AN: 152174Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2AN XY: 74336
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:8
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not provided Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Apr 18, 2022 | In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge - |
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jan 24, 2024 | This sequence change replaces phenylalanine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 4223 of the USH2A protein (p.Phe4223Leu). This variant is present in population databases (rs150900847, gnomAD 0.008%). 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: 48404). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt USH2A protein function with a negative predictive value of 95%. 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. - |
Usher syndrome type 2A Uncertain:2
Uncertain significance, no assertion criteria provided | clinical testing | Natera, Inc. | Sep 16, 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 | Aug 26, 2015 | Variant classified as Uncertain Significance - Favor Benign. The p.Phe4223Leu va riant in USH2A has been identified by our laboratory in 2 individuals with heari ng loss; however, a second variant was not identified in either individual. It h as also been identified in 2/10338 African chromosomes and in 4/66532 European c hromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute .org; dbSNP rs150900847). Computational prediction tools and conservation analys is suggest that the p.Phe4223Leu variant may not impact the protein, though this information is not predictive enough to rule out pathogenicity. In summary, whi le the clinical significance of the p.Phe4223Leu variant is uncertain, these dat a suggest it is more likely to be benign. - |
Inborn genetic diseases Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Apr 06, 2022 | The c.12667T>C (p.F4223L) alteration is located in exon 63 (coding exon 62) of the USH2A gene. This alteration results from a T to C substitution at nucleotide position 12667, causing the phenylalanine (F) at amino acid position 4223 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
Usher syndrome type 2A;C3151138:Retinitis pigmentosa 39 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Counsyl | Dec 16, 2016 | - - |
Retinitis pigmentosa 39 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Nov 04, 2023 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
DEOGEN2
Benign
T
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Benign
D
LIST_S2
Benign
T
M_CAP
Pathogenic
D
MetaRNN
Uncertain
D
MetaSVM
Benign
T
MutationAssessor
Uncertain
M
MutationTaster
Benign
N;N
PrimateAI
Benign
T
PROVEAN
Uncertain
D
REVEL
Benign
Sift
Uncertain
D
Sift4G
Uncertain
D
Polyphen
P
Vest4
MutPred
Gain of loop (P = 0.1069);
MVP
MPC
ClinPred
T
GERP RS
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at