rs144697496

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001164688.2(RD3):c.202C>T(p.Arg68Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000316 in 1,614,276 control chromosomes in the GnomAD database, including 1 homozygotes. 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. R68Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00032 ( 1 hom. )

Consequence

RD3
NM_001164688.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.26

Publications

7 publications found

Variant links:

Genes affected

RD3 (HGNC:19689): (RD3 regulator of GUCY2D) This gene encodes a retinal protein that is associated with promyelocytic leukemia-gene product (PML) bodies in the nucleus. Mutations in this gene cause Leber congenital amaurosis type 12, a disease that results in retinal degeneration. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2009]

RD3 Gene-Disease associations (from GenCC):

Leber congenital amaurosis 12
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
Leber congenital amaurosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

RD3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.13511735).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RD3	NM_001164688.2 link	c.202C>T	p.Arg68Trp	missense_variant	Exon 2 of 3	ENST00000680073.1	NP_001158160.1	Q7Z3Z2
RD3	NM_183059.3 link	c.202C>T	p.Arg68Trp	missense_variant	Exon 2 of 3		NP_898882.1	Q7Z3Z2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
RD3	ENST00000680073.1 link	c.202C>T	p.Arg68Trp	missense_variant	Exon 2 of 3		NM_001164688.2	ENSP00000505312.1	Q7Z3Z2
RD3	ENST00000367002.5 link	c.202C>T	p.Arg68Trp	missense_variant	Exon 2 of 3	1		ENSP00000355969.4	Q7Z3Z2
RD3	ENST00000484910.1 link	n.265-1887C>T		intron_variant	Intron 1 of 1	1

Frequencies

GnomAD3 genomes

AF:

0.000263

AC:

AN:

152280

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000964

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00103

Gnomad FIN

AF:

0.000188

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000411

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000274

AC:

AN:

251388

AF XY:

0.000302

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.000231

Gnomad NFE exome

AF:

0.000352

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000322

AC:

470

AN:

1461878

Hom.:

Cov.:

AF XY:

0.000316

AC XY:

230

AN XY:

727240

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33480

American (AMR)

AF:

0.0000447

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39700

South Asian (SAS)

AF:

0.000754

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.000206

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000341

AC:

379

AN:

1112006

Other (OTH)

AF:

0.000166

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

130

163

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000262

AC:

AN:

152398

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

74528

show subpopulations

African (AFR)

AF:

0.0000962

AC:

AN:

41596

American (AMR)

AF:

0.00

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5196

South Asian (SAS)

AF:

0.00104

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.000188

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000411

AC:

AN:

68046

Other (OTH)

AF:

0.000473

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.519

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000312

Hom.:

Bravo

AF:

0.000227

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000581

AC:

ExAC

AF:

0.000239

AC:

Asia WGS

AF:

0.00260

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Leber congenital amaurosis 12

Uncertain:1

Sep 19, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 68 of the RD3 protein (p.Arg68Trp). This variant is present in population databases (rs144697496, gnomAD 0.07%). This missense change has been observed in individual(s) with retinitis pigmentosa (PMID: 17186464). ClinVar contains an entry for this variant (Variation ID: 466320). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. Experimental studies have shown that this missense change affects RD3 function (PMID: 21928830). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.41

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.20

Eigen

Benign

0.085

Eigen_PC

Benign

-0.097

FATHMM_MKL

Uncertain

0.88

LIST_S2

Uncertain

0.89

M_CAP

Benign

0.020

MetaRNN

Benign

0.14

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.4

PhyloP100

2.3

PrimateAI

Benign

0.41

PROVEAN

Pathogenic

-4.5

REVEL

Benign

0.12

Sift

Uncertain

0.0040

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.47

MVP

0.17

MPC

1.1

ClinPred

0.54

GERP RS

-0.89

Varity_R

0.19

gMVP

0.43

Mutation Taster

=69/31

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over