rs104893778

Positions:

• chr3-129533701-C-G
• chr3-129533701-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 6P and 1B. PM1 PM2 PM5 BP4

The NM_000539.3(RHO):​c.1030C>G​(p.Gln344Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts 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. Q344H) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RHO NM_000539.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 4.39

Genes affected

RHO (HGNC:10012): (rhodopsin) The protein encoded by this gene is found in rod cells in the back of the eye and is essential for vision in low-light conditions. The encoded protein binds to 11-cis retinal and is activated when light hits the retinal molecule. Defects in this gene are a cause of congenital stationary night blindness. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM1: In a region_of_interest Interaction with SAG (size 18) in uniprot entity OPSD_HUMAN there are 32 pathogenic changes around while only 0 benign (100%) in NM_000539.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr3-129533703-G-C is described in Lovd as [Likely_pathogenic].
• BP4: Computational evidence support a benign effect (MetaRNN=0.30920914).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RHO	NM_000539.3	c.1030C>G	p.Gln344Glu	missense_variant	5/5	ENST00000296271.4	NP_000530.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RHO	ENST00000296271.4	c.1030C>G	p.Gln344Glu	missense_variant	5/5	1	NM_000539.3	ENSP00000296271.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 11, 2022

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. This variant disrupts the p.Gln344 amino acid residue in RHO. Other variant(s) that disrupt this residue have been observed in individuals with RHO-related conditions (PMID: 20164459, 33576794; Invitae), which suggests that this may be a clinically significant amino acid residue. 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 RHO protein function. ClinVar contains an entry for this variant (Variation ID: 866738). This missense change has been observed in individual(s) with retinitis pigmentosa (Invitae). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glutamine, which is neutral and polar, with glutamic acid, which is acidic and polar, at codon 344 of the RHO protein (p.Gln344Glu). -

Retinal dystrophy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Blueprint Genetics

Feb 13, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.091
BayesDel_addAF	Benign	0.0094	T
BayesDel_noAF	Benign	-0.22
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.38	T
Eigen	Benign	-0.12
Eigen_PC	Benign	0.12
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.95	D
M_CAP	Benign	0.033	D
MetaRNN	Benign	0.31	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.5	L
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	-0.62	N
REVEL	Benign	0.20
Sift	Uncertain	0.010	D
Sift4G	Benign	0.062	T
Polyphen		0.059	B
Vest4		0.44
MutPred		0.14		Gain of glycosylation at T342 (P = 0.0733);
MVP		0.74
MPC		0.41
ClinPred		0.69	D
GERP RS		5.4
Varity_R		0.53
gMVP		0.80

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: rs104893778; hg19: chr3-129252544;