1-241594660-A-C

Position:

chr1-241594660-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_014322.3(OPN3):c.977T>G(p.Leu326Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000248 in 1,613,896 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

OPN3
NM_014322.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.00

Variant links:

Genes affected

OPN3 (HGNC:14007): (opsin 3) Opsins are members of the guanine nucleotide-binding protein (G protein)-coupled receptor superfamily. In addition to the visual opsins, mammals possess several photoreceptive non-visual opsins that are expressed in extraocular tissues. This gene, opsin 3, is strongly expressed in brain and testis and weakly expressed in liver, placenta, heart, lung, skeletal muscle, kidney, and pancreas. The gene may also be expressed in the retina. The protein has the canonical features of a photoreceptive opsin protein. [provided by RefSeq, Jul 2008]

OPN3 links:

KMO (HGNC:6381): (kynurenine 3-monooxygenase) This gene encodes a mitochondrion outer membrane protein that catalyzes the hydroxylation of L-tryptophan metabolite, L-kynurenine, to form L-3-hydroxykynurenine. Studies in yeast identified this gene as a therapeutic target for Huntington disease. [provided by RefSeq, Oct 2011]

KMO links:

OPN3 (HGNC:):

OPN3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1389496).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OPN3	NM_014322.3 linkuse as main transcript	c.977T>G	p.Leu326Arg	missense_variant	4/4	ENST00000366554.3	NP_055137.2	Q9H1Y3-1
KMO	NM_003679.5 linkuse as main transcript	c.*2507A>C		3_prime_UTR_variant	15/15	ENST00000366559.9	NP_003670.2	O15229-1A8K693
KMO	NM_001410944.1 linkuse as main transcript	c.*2507A>C		3_prime_UTR_variant	15/15		NP_001397873.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OPN3	ENST00000366554.3 linkuse as main transcript	c.977T>G	p.Leu326Arg	missense_variant	4/4	1	NM_014322.3	ENSP00000355512.2		Q9H1Y3-1
KMO	ENST00000366559.9 linkuse as main transcript	c.*2507A>C		3_prime_UTR_variant	15/15	1	NM_003679.5	ENSP00000355517.4		O15229-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152198

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461698

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727146

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152198

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74360

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 24, 2024

The c.977T>G (p.L326R) alteration is located in exon 4 (coding exon 4) of the OPN3 gene. This alteration results from a T to G substitution at nucleotide position 977, causing the leucine (L) at amino acid position 326 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.072

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.48

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.025

Eigen

Benign

-0.49

Eigen_PC

Benign

-0.40

FATHMM_MKL

Uncertain

0.79

LIST_S2

Benign

0.75

M_CAP

Benign

0.0040

MetaRNN

Benign

0.14

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

PrimateAI

Benign

0.36

PROVEAN

Benign

-0.32

REVEL

Benign

0.065

Sift

Benign

0.29

Sift4G

Benign

0.17

Polyphen

0.17

Vest4

0.18

MutPred

0.62

Gain of MoRF binding (P = 0.0126);

MVP

0.11

MPC

0.61

ClinPred

0.51

GERP RS

3.0

Varity_R

0.13

gMVP

0.37

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over