X-154156392-G-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_020061.6(OPN1LW):c.843G>T(p.Trp281Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 19)
• Consequence: OPN1LW NM_020061.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.82

Genes affected

OPN1LW (HGNC:9936): (opsin 1, long wave sensitive) This gene encodes for a light absorbing visual pigment of the opsin gene family. The encoded protein is called red cone photopigment or long-wavelength sensitive opsin. Opsins are G-protein coupled receptors with seven transmembrane domains, an N-terminal extracellular domain, and a C-terminal cytoplasmic domain. This gene and the medium-wavelength opsin gene are tandemly arrayed on the X chromosome and frequent unequal recombination and gene conversion may occur between these sequences. X chromosomes may have fusions of the medium- and long-wavelength opsin genes or may have more than one copy of these genes. Defects in this gene are the cause of partial, protanopic colorblindness. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.982

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OPN1LW	NM_020061.6	c.843G>T	p.Trp281Cys	missense_variant	5/6	ENST00000369951.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
OPN1LW	ENST00000369951.9	c.843G>T	p.Trp281Cys	missense_variant	5/6	1	NM_020061.6	P1
OPN1LW	ENST00000442922.1	c.384+48G>T		intron_variant		5
OPN1LW	ENST00000463296.1	n.687G>T		non_coding_transcript_exon_variant	4/4	5

Frequencies

GnomAD3 genomes Cov.: 19

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 19

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cone monochromatism Uncertain:1

Uncertain significance, criteria provided, single submitter

not provided

Institute of Human Genetics, University Hospital of Duesseldorf

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.56	D
BayesDel_noAF	Pathogenic	0.57
Cadd	Pathogenic	27
Dann	Uncertain	0.99
FATHMM_MKL	Pathogenic	0.98	D
M_CAP	Pathogenic	0.86	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	0.89	D
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.72	T
PROVEAN	Pathogenic	-10	D
REVEL	Pathogenic	0.88
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Vest4		0.91
MutPred		0.72		Loss of MoRF binding (P = 0.3927);
MVP		1.0
MPC		2.2
ClinPred		1.0	D
GERP RS		4.4
gMVP		0.94

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: rs2067084843; hg19: chrX-153421867;