NM_000440.3:c.1705C>A

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2PP3_ModeratePP5_Very_Strong

The NM_000440.3(PDE6A):c.1705C>A(p.Gln569Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000122 in 1,613,486 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 Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

PDE6A
NM_000440.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:9U:1

Conservation

PhyloP100: 9.53

Variant links:

Genes affected

PDE6A (HGNC:8785): (phosphodiesterase 6A) This gene encodes the cyclic-GMP (cGMP)-specific phosphodiesterase 6A alpha subunit, expressed in cells of the retinal rod outer segment. The phosphodiesterase 6 holoenzyme is a heterotrimer composed of an alpha, beta, and two gamma subunits. cGMP is an important regulator of rod cell membrane current, and its dynamic concentration is established by phosphodiesterase 6A cGMP hydrolysis and guanylate cyclase cGMP synthesis. The protein is a subunit of a key phototransduction enzyme and participates in processes of transmission and amplification of the visual signal. Mutations in this gene have been identified as one cause of autosomal recessive retinitis pigmentosa. [provided by RefSeq, Jul 2008]

PDE6A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.889

PP5

Variant 5-149895206-G-T is Pathogenic according to our data. Variant chr5-149895206-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 167431.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr5-149895206-G-T is described in Lovd as [Pathogenic]. Variant chr5-149895206-G-T is described in Lovd as [Likely_pathogenic]. Variant chr5-149895206-G-T is described in Lovd as [Likely_pathogenic]. Variant chr5-149895206-G-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PDE6A	NM_000440.3 link	c.1705C>A	p.Gln569Lys	missense_variant	Exon 13 of 22	ENST00000255266.10	NP_000431.2	P16499

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PDE6A	ENST00000255266.10 link	c.1705C>A	p.Gln569Lys	missense_variant	Exon 13 of 22	1	NM_000440.3	ENSP00000255266.5	P16499
PDE6A	ENST00000508173.5 link	n.1889C>A		non_coding_transcript_exon_variant	Exon 11 of 20	1
PDE6A	ENST00000613228.1 link	c.1462C>A	p.Gln488Lys	missense_variant	Exon 11 of 20	5		ENSP00000478060.1	F1T0K3

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000283

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000115

AC:

AN:

251448

Hom.:

AF XY:

0.000110

AC XY:

AN XY:

135900

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.000132

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000120

AC:

176

AN:

1461188

Hom.:

Cov.:

AF XY:

0.000111

AC XY:

AN XY:

726948

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000291

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000562

Gnomad4 NFE exome

AF:

0.000134

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.000138

AC:

AN:

152298

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74476

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000283

Gnomad4 NFE

AF:

0.000206

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000138

Hom.:

Bravo

AF:

0.000117

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000988

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000237

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:9Uncertain:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Pathogenic:3Uncertain:1

Apr 24, 2024

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 30337596, 10393062, 31049658, 29343940, 26806561, 30998820, 31736247, 33057649, 33576794, 32037395, 21151602) -

Feb 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

PDE6A: PM3:Very Strong, PM2, PP3 -

Apr 07, 2014

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamine, which is neutral and polar, with lysine, which is basic and polar, at codon 569 of the PDE6A protein (p.Gln569Lys). This variant is present in population databases (rs139444207, gnomAD 0.03%). This missense change has been observed in individual(s) with retinitis pigmentosa (PMID: 10393062, 21151602, 29343940). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 167431). Invitae Evidence 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 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 PDE6A protein function. For these reasons, this variant has been classified as Pathogenic. -

Retinitis pigmentosa 43

Pathogenic:3

May 04, 2022

Mendelics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 11, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 08, 2021

Ocular Genomics Institute, Massachusetts Eye and Ear

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

The PDE6A c.1705C>A variant was identified in an individual with retinitis pigmentosa with a presumed recessive inheritance pattern. Through a review of available evidence we were able to apply the following criteria: PS1, PM2, PP3. Based on this evidence we have classified this variant as Likely Pathogenic. -

Retinitis pigmentosa

Pathogenic:2

Sep 02, 2016

Illumina Laboratory Services, Illumina

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The PDE6A c.1705C>A (p.Gln569Lys) missense variant has been reported in two studies and is found in a total of five individuals with autosomal recessive retinitis pigmentosa, including one homozygote and four compound heterozygotes (Dryja et al. 1999; Avila-Fernandez 2010). The variant is also found in a heterozygous state in six unaffected relatives of the affected individuals. The p.Gln569Lys variant was absent from 70 controls but is reported at a frequency of 0.00026 in the Latino population of the Exome Aggregation Consortium. Based on the evidence, the p.Gln569Lys variant is classified as likely pathogenic for autosomal recessive retinitis pigmentosa. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

Apr 01, 2021

Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: curation

The p.Gln569Lys variant in PDE6A was identified in an individual with Retinitis pigmentosa, via a collaborative study between the Broad Institute's Center for Mendelian Genomics and the Pierce lab (https://oculargenomics.meei.harvard.edu/labs/pierce-lab/lab-members/). Through a review of available evidence we were able to apply the following criteria: PS1, PM2. PP3. Based on this evidence we have classified this variant as Likely Pathogenic. If you have any questions about the classification please reach out to the Pierce Lab. -

PDE6A-related disorder

Pathogenic:1

Oct 09, 2023

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The PDE6A c.1705C>A variant is predicted to result in the amino acid substitution p.Gln569Lys. This variant has been reported many times in the compound heterozygous state in individuals with retinitis pigmentosa (see for examples Bryant et al. 2017. PubMed ID: 29343940; Ezquerra-Inchausti et al. 2018. PubMed ID: 30337596; Table S2 in Zampaglione et al. 2020. PubMed ID: 32037395). This variant is reported in 0.028% of alleles in individuals of Latino descent in gnomAD (http://gnomad.broadinstitute.org/variant/5-149274769-G-T). Given the evidence, we interpret c.1705C>A (p.Gln569Lys) as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.98

BayesDel_addAF

Pathogenic

0.21

BayesDel_noAF

Pathogenic

0.36

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.88

D;D;D

Eigen

Pathogenic

0.73

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Pathogenic

0.99

D;D;.

M_CAP

Benign

0.058

MetaRNN

Pathogenic

0.89

D;D;D

MetaSVM

Uncertain

0.63

MutationAssessor

Pathogenic

3.8

.;H;.

PrimateAI

Pathogenic

0.80

PROVEAN

Uncertain

-3.4

.;D;.

REVEL

Pathogenic

0.87

Sift

Uncertain

0.0030

.;D;.

Sift4G

Uncertain

0.015

D;D;D

Polyphen

0.49

.;P;.

Vest4

0.97

MVP

0.95

MPC

0.22

ClinPred

0.44

GERP RS

4.9

Varity_R

0.93

gMVP

0.74

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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