1-216418661-T-G

Position:

• chr1-216418661-T-G

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_206933.4(USH2A):​c.504A>C​(p.Thr168Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. T168T) has been classified as Benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: USH2A NM_206933.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.565

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 -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP7: Synonymous conserved (PhyloP=-0.565 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
USH2A	NM_206933.4	c.504A>C	p.Thr168Thr	synonymous_variant	3/72	ENST00000307340.8	NP_996816.3
USH2A	NM_007123.6	c.504A>C	p.Thr168Thr	synonymous_variant	3/21		NP_009054.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
USH2A	ENST00000307340.8	c.504A>C	p.Thr168Thr	synonymous_variant	3/72	1	NM_206933.4	ENSP00000305941.3
USH2A	ENST00000366942.3	c.504A>C	p.Thr168Thr	synonymous_variant	3/21	1		ENSP00000355909.3
USH2A	ENST00000674083.1	c.504A>C	p.Thr168Thr	synonymous_variant	3/73			ENSP00000501296.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 55

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.60
DANN	Benign	0.45

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: rs4253963; hg19: chr1-216592003;