1-216421918-G-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_206933.4(USH2A):c.419C>A(p.Pro140His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,670 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P140S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: USH2A NM_206933.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.633

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]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06343937).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
USH2A	NM_206933.4	c.419C>A	p.Pro140His	missense_variant	2/72	ENST00000307340.8
USH2A	NM_007123.6	c.419C>A	p.Pro140His	missense_variant	2/21

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
USH2A	ENST00000307340.8	c.419C>A	p.Pro140His	missense_variant	2/72	1	NM_206933.4	P1
USH2A	ENST00000366942.3	c.419C>A	p.Pro140His	missense_variant	2/21	1
USH2A	ENST00000674083.1	c.419C>A	p.Pro140His	missense_variant	2/73

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000120 AC: 3 AN: 250798 Hom.: 0 AF XY: 0.0000148 AC XY: 2 AN XY: 135512

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000163

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461670 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727122

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Usher syndrome type 2A;C3151138:Retinitis pigmentosa 39 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

May 30, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.087
BayesDel_addAF	Benign	-0.38	T
BayesDel_noAF	Benign	-0.52
Cadd	Benign	17
Dann	Benign	0.96
DEOGEN2	Benign	0.054	T;.
Eigen	Benign	-0.44
Eigen_PC	Benign	-0.32
FATHMM_MKL	Benign	0.23	N
LIST_S2	Benign	0.57	T;T
M_CAP	Benign	0.033	D
MetaRNN	Benign	0.063	T;T
MetaSVM	Benign	-0.87	T
MutationAssessor	Benign	1.6	L;L
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.25	T
PROVEAN	Benign	-1.2	N;N
REVEL	Benign	0.042
Sift	Benign	0.23	T;T
Sift4G	Benign	0.46	T;T
Polyphen		0.012	B;B
Vest4		0.087
MutPred		0.26		Loss of glycosylation at P140 (P = 0.0113);Loss of glycosylation at P140 (P = 0.0113);
MVP		0.82
MPC		0.042
ClinPred		0.062	T
GERP RS		2.3
Varity_R		0.073
gMVP		0.44

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

Other links and lift over

dbSNP: rs759474177; hg19: chr1-216595260;