rs56385601
Variant summary
Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2
The NM_206933.4(USH2A):c.7685T>C(p.Val2562Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00756 in 1,614,060 control chromosomes in the GnomAD database, including 62 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V2562F) has been classified as Uncertain significance.
Frequency
Consequence
NM_206933.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -16 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
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USH2A | ENST00000307340.8 | c.7685T>C | p.Val2562Ala | missense_variant | Exon 41 of 72 | 1 | NM_206933.4 | ENSP00000305941.3 | ||
USH2A | ENST00000674083.1 | c.7685T>C | p.Val2562Ala | missense_variant | Exon 41 of 73 | ENSP00000501296.1 | ||||
ENSG00000229242 | ENST00000414995.1 | n.60+2323A>G | intron_variant | Intron 1 of 1 | 3 |
Frequencies
GnomAD3 genomes AF: 0.00587 AC: 893AN: 152094Hom.: 4 Cov.: 32
GnomAD3 exomes AF: 0.00649 AC: 1630AN: 251140Hom.: 15 AF XY: 0.00670 AC XY: 910AN XY: 135732
GnomAD4 exome AF: 0.00774 AC: 11317AN: 1461848Hom.: 58 Cov.: 32 AF XY: 0.00788 AC XY: 5733AN XY: 727230
GnomAD4 genome AF: 0.00587 AC: 893AN: 152212Hom.: 4 Cov.: 32 AF XY: 0.00563 AC XY: 419AN XY: 74418
ClinVar
Submissions by phenotype
not provided Benign:6
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USH2A: BP4, BS2 -
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This variant is associated with the following publications: (PMID: 31266775, 19683999, 23484092, 18273898, 20052763, 22681893, 26927203, 22004887) -
not specified Benign:4
Variant summary: USH2A c.7685T>C (p.Val2562Ala) results in a non-conservative amino acid change located in the Fibronectin type III domain (IPR003961) of the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0065 in 251140 control chromosomes, predominantly at a frequency of 0.0095 within the Non-Finnish European subpopulation in the gnomAD database, including 12 homozygotes. This frequency is close to that estimated for a pathogenic variant in USH2A causing Usher Syndrome (0.0065 vs 0.011), supporting a neutral outcome. Although reported frequently in the literature, to our knowledge, no occurrence of c.7685T>C in individuals affected with Usher Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. At-least one report listed this variant along with two other pathogenic alleles in an individual with Usher syndrome, supporting a benign outcome (example, Hagag_2020). Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as benign. Based on the evidence outlined above, the variant was classified as benign. -
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Val2562Ala in exon 41 of USH2A: This variant has been reported in nine individua ls with a clinical diagnosis of Usher Syndrome types 1, 2 or 3 (Dreyer 2008, Jai jo 2009). However, several of these individuals already had other explanations f or their Usher syndrome (Jaijo 2009). In addition, this amino acid is not highly conserved acroos evolution, with the mouse and rat having an alanine at positio n 2562. In addition, this variant is listed in dbSNP (rs56385601 - no frequency data available) and has been identified in 6/278 (2.2%) probands tested by our l aboratory, none of whom had a variant on their second USH2A allele. In summary, this variant meets our criteria to be classified as benign. -
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Usher syndrome type 2A Benign:2
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Retinitis pigmentosa 39 Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at