rs61752395

Positions:

chr1-94063262-C-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 4P and 9B. PM1PM5BP4_StrongBP6BS2

The NM_000350.3(ABCA4):c.1610G>A(p.Arg537His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00118 in 1,614,098 control chromosomes in the GnomAD database, including 9 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R537C) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.0017 ( 1 hom., cov: 32)

Exomes 𝑓: 0.0011 ( 8 hom. )

Consequence

ABCA4
NM_000350.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:1B:7O:1

Conservation

PhyloP100: 0.470

Variant links:

Genes affected

ABCA4 (HGNC:34): (ATP binding cassette subfamily A member 4) The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intracellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the ABC1 subfamily. Members of the ABC1 subfamily comprise the only major ABC subfamily found exclusively in multicellular eukaryotes. This protein is a retina-specific ABC transporter with N-retinylidene-PE as a substrate. It is expressed exclusively in retina photoreceptor cells, and the gene product mediates transport of an essental molecule, all-trans-retinal aldehyde (atRAL), across the photoreceptor cell membrane. Mutations in this gene are found in patients diagnosed with Stargardt disease, a form of juvenile-onset macular degeneration. Mutations in this gene are also associated with retinitis pigmentosa-19, cone-rod dystrophy type 3, early-onset severe retinal dystrophy, fundus flavimaculatus, and macular degeneration age-related 2. [provided by RefSeq, Sep 2019]

ABCA4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 5 uncertain in NM_000350.3

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-94063263-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 99062.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP4

Computational evidence support a benign effect (MetaRNN=0.009602398).

BP6

Variant 1-94063262-C-T is Benign according to our data. Variant chr1-94063262-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 99064.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=6, not_provided=1, Likely_pathogenic=1, Benign=1}. Variant chr1-94063262-C-T is described in Lovd as [Likely_benign]. Variant chr1-94063262-C-T is described in Lovd as [Likely_pathogenic]. Variant chr1-94063262-C-T is described in Lovd as [Pathogenic].

BS2

High Homozygotes in GnomAdExome4 at 8 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABCA4	NM_000350.3 link	c.1610G>A	p.Arg537His	missense_variant	12/50	ENST00000370225.4	NP_000341.2	P78363Q6AI28
ABCA4	NM_001425324.1 link	c.1610G>A	p.Arg537His	missense_variant	12/49		NP_001412253.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABCA4	ENST00000370225.4 link	c.1610G>A	p.Arg537His	missense_variant	12/50	1	NM_000350.3	ENSP00000359245.3		P78363
ABCA4	ENST00000649773.1 link	c.1610G>A	p.Arg537His	missense_variant	12/19			ENSP00000496882.1		A0A3B3IRV8

Frequencies

GnomAD3 genomes

AF:

0.00166

AC:

252

AN:

152092

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.0155

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00115

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.00204

AC:

512

AN:

251390

Hom.:

AF XY:

0.00199

AC XY:

270

AN XY:

135856

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000173

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0135

Gnomad NFE exome

AF:

0.00181

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.00113

AC:

1651

AN:

1461888

Hom.:

Cov.:

AF XY:

0.00109

AC XY:

795

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.0121

Gnomad4 NFE exome

AF:

0.000836

Gnomad4 OTH exome

AF:

0.00104

GnomAD4 genome

AF:

0.00166

AC:

252

AN:

152210

Hom.:

Cov.:

AF XY:

0.00230

AC XY:

171

AN XY:

74408

show subpopulations

Gnomad4 AFR

AF:

0.0000963

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.0155

Gnomad4 NFE

AF:

0.00115

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000828

Hom.:

Bravo

AF:

0.000514

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000930

AC:

ExAC

AF:

0.00197

AC:

239

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.000654

EpiControl

AF:

0.000830

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:1Benign:7Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:2Other:1

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Apr 15, 2019	This variant is associated with the following publications: (PMID: 14517951, 29068140, 28838317, 29925512, 32783370) -
not provided, no classification provided	literature only	Retina International	-	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 21, 2024	- -

Retinal dystrophy

Pathogenic:1Uncertain:1

Likely pathogenic, flagged submission	clinical testing	Blueprint Genetics	Aug 16, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Institute of Human Genetics, Univ. Regensburg, Univ. Regensburg	Jan 01, 2018	- -

Retinitis Pigmentosa, Recessive

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Stargardt Disease, Recessive

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

ABCA4-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Cone-Rod Dystrophy, Recessive

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Macular degeneration

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.072

BayesDel_addAF

Benign

-0.036

BayesDel_noAF

Pathogenic

0.16

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.69

D;.

Eigen

Benign

0.18

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Benign

0.74

LIST_S2

Uncertain

0.89

D;D

MetaRNN

Benign

0.0096

T;T

MetaSVM

Uncertain

0.73

MutationAssessor

Benign

1.5

L;.

PrimateAI

Benign

0.34

PROVEAN

Uncertain

-2.5

N;.

REVEL

Pathogenic

0.71

Sift

Benign

0.035

D;.

Sift4G

Benign

0.076

T;.

Polyphen

0.87

P;.

Vest4

0.31

MVP

0.97

MPC

0.15

ClinPred

0.053

GERP RS

5.0

Varity_R

0.093

gMVP

0.77

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

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