chr6-63721663-T-C

Position:

• chr6-63721663-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1 PM2 PP3_Moderate PP5

The NM_001142800.2(EYS):​c.8368A>G​(p.Arg2790Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000858 in 1,399,230 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000086 (0 hom.)
• Consequence: EYS NM_001142800.2 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2 U:2
• Conservation: PhyloP100: 3.21

Genes affected

EYS (HGNC:21555): (eyes shut homolog) The product of this gene contains multiple epidermal growth factor (EGF)-like and LamG domains. The protein is expressed in the photoreceptor layer of the retina, and the gene is mutated in autosomal recessive retinitis pigmentosa. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2008]

PHF3 (HGNC:8921): (PHD finger protein 3) This gene encodes a member of a PHD finger-containing gene family. This gene may function as a transcription factor and may be involved in glioblastomas development. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2014]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM1: In a domain Laminin G-like 4 (size 178) in uniprot entity EYS_HUMAN there are 22 pathogenic changes around while only 1 benign (96%) in NM_001142800.2
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.889
• PP5: Variant 6-63721663-T-C is Pathogenic according to our data. Variant chr6-63721663-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 438209.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=1, Uncertain_significance=2}. Variant chr6-63721663-T-C is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EYS	NM_001142800.2	c.8368A>G	p.Arg2790Gly	missense_variant	43/43	ENST00000503581.6	NP_001136272.1
PHF3	NM_001370348.2	c.*7955T>C		3_prime_UTR_variant	16/16	ENST00000262043.8	NP_001357277.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EYS	ENST00000503581.6	c.8368A>G	p.Arg2790Gly	missense_variant	43/43	5	NM_001142800.2	ENSP00000424243	A2
EYS	ENST00000370621.7	c.8431A>G	p.Arg2811Gly	missense_variant	44/44	1		ENSP00000359655	P2
PHF3	ENST00000262043.8	c.*7955T>C		3_prime_UTR_variant	16/16	5	NM_001370348.2	ENSP00000262043	P1
PHF3	ENST00000505138.1	c.363+10301T>C		intron_variant		3		ENSP00000421417

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000858 AC: 12 AN: 1399230 Hom.: 0 Cov.: 31 AF XY: 0.0000116 AC XY: 8 AN XY: 690110

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000280

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000102

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2 Uncertain:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 13, 2023

This sequence change replaces arginine, which is basic and polar, with glycine, which is neutral and non-polar, at codon 2790 of the EYS protein (p.Arg2790Gly). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with clinical features of retinitis pigmentosa (PMID: 28041643; Invitae). ClinVar contains an entry for this variant (Variation ID: 438209). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on EYS protein function. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -

Retinitis pigmentosa Pathogenic:1

Likely pathogenic, no assertion criteria provided

research

NIHR Bioresource Rare Diseases, University of Cambridge

Jan 01, 2015

- -

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Aug 01, 2022

Variant summary: EYS c.8368A>G (p.Arg2790Gly) results in a non-conservative amino acid change located in the Laminin G domain (IPR001791) of the encoded protein sequence. Three of four in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 156774 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.8368A>G has been reported in the literature in at-least one compound heterozygous individual reportedly diagnosed with Retinitis Pigmentosa (example: Carss_2017). These data do not allow any conclusion about variant significance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Three submitters provided clinical-significance assessments for this variant to ClinVar after 2014 and classified the variant as VUS (n=2) and likely pathogenic (n=1). Based on the evidence outlined above, the variant was classified as uncertain significance -

Retinitis pigmentosa 25 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

Oct 24, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.83
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.10
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.12	.;T
Eigen	Uncertain	0.60
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.81	T;T
M_CAP	Uncertain	0.24	D
MetaRNN	Pathogenic	0.89	D;D
MetaSVM	Uncertain	0.26	D
MutationAssessor	Pathogenic	3.6	.;H
MutationTaster	Benign	0.99	N;N;N
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-1.6	N;N
REVEL	Pathogenic	0.72
Sift	Benign	0.095	T;T
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.74
MutPred		0.69		.;Gain of catalytic residue at V2812 (P = 0.0457);
MVP		0.57
MPC		0.060
ClinPred		0.95	D
GERP RS		4.7
Varity_R		0.36
gMVP		0.85

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: rs1554163993; hg19: chr6-64431559;