8-54626598-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_006269.2(RP1):c.2716G>A(p.Ala906Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000583 in 1,613,408 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict 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. A906S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000060 ( 0 hom. )

Consequence

RP1
NM_006269.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:6

Conservation

PhyloP100: 0.666

Publications

0 publications found

Variant links:

Genes affected

RP1 (HGNC:10263): (RP1 axonemal microtubule associated) This gene encodes a member of the doublecortin family. The protein encoded by this gene contains two doublecortin domains, which bind microtubules and regulate microtubule polymerization. The encoded protein is a photoreceptor microtubule-associated protein and is required for correct stacking of outer segment disc. This protein and the RP1L1 protein, another retinal-specific protein, play essential and synergistic roles in affecting photosensitivity and outer segment morphogenesis of rod photoreceptors. Because of its response to in vivo retinal oxygen levels, this protein was initially named ORP1 (oxygen-regulated protein-1). This protein was subsequently designated RP1 (retinitis pigmentosa 1) when it was found that mutations in this gene cause autosomal dominant retinitis pigmentosa. Mutations in this gene also cause autosomal recessive retinitis pigmentosa. Transcript variants resulted from an alternative promoter and alternative splicings have been found, which overlap the current reference sequence and has several exons upstream and downstream of the current reference sequence. However, the biological validity and full-length nature of some variants cannot be determined at this time.[provided by RefSeq, Sep 2010]

RP1 Gene-Disease associations (from GenCC):

RP1-related dominant retinopathy
Inheritance: AD, SD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, ClinGen
retinitis pigmentosa 1
Inheritance: AR, AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Illumina, Labcorp Genetics (formerly Invitae), Ambry Genetics
RP1-related recessive retinopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: Ambry Genetics, ClinGen
retinitis pigmentosa
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

RP1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.015234679).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RP1	NM_006269.2 link	c.2716G>A	p.Ala906Thr	missense_variant	Exon 4 of 4	ENST00000220676.2	NP_006260.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
RP1	ENST00000220676.2 link	c.2716G>A	p.Ala906Thr	missense_variant	Exon 4 of 4	1	NM_006269.2	ENSP00000220676.1
RP1	ENST00000637698.1 link	c.787+4310G>A		intron_variant	Intron 3 of 28	5		ENSP00000490104.1
RP1	ENST00000636932.1 link	c.787+4310G>A		intron_variant	Intron 3 of 22	5		ENSP00000489857.1

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152072

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000120

AC:

AN:

249938

AF XY:

0.0000886

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000174

Gnomad ASJ exome

AF:

0.00139

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000531

Gnomad OTH exome

AF:

0.000658

GnomAD4 exome

AF:

0.0000595

AC:

AN:

1461336

Hom.:

Cov.:

AF XY:

0.0000564

AC XY:

AN XY:

726964

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33422

American (AMR)

AF:

0.000157

AC:

AN:

44660

Ashkenazi Jewish (ASJ)

AF:

0.00165

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39664

South Asian (SAS)

AF:

0.00

AC:

AN:

86184

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53296

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000180

AC:

AN:

1111856

Other (OTH)

AF:

0.000182

AC:

AN:

60368

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.467

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152072

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

74284

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41412

American (AMR)

AF:

0.00

AC:

AN:

15262

Ashkenazi Jewish (ASJ)

AF:

0.00115

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.000207

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10584

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.511

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:

0.000135

Hom.:

Bravo

AF:

0.0000718

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000494

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:4

Jun 23, 2018

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The RP1 c.2716G>A; p.Ala906Thr variant (rs201538234), to our knowledge, is not reported in the medical literature. The variant is reported in the ClinVar database (Variation ID: 167603) and in the general population with an overall allele frequency of 0.01% (29/276206 alleles) in the Genome Aggregation Database. The alanine at codon 906 is weakly conserved but computational analyses predict this variant is deleterious. Considering available information, there is insufficient evidence to classify this variant with certainty. Pathogenic RP1 variants are causative for autosomal dominant or recessive retinitis pigmentosa (MIM: 180100). -

Apr 27, 2014

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Oct 16, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 906 of the RP1 protein (p.Ala906Thr). This variant is present in population databases (rs201538234, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with RP1-related conditions. ClinVar contains an entry for this variant (Variation ID: 167603). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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. -

Breakthrough Genomics, Breakthrough Genomics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Retinitis pigmentosa 1

Uncertain:2

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 24, 2020

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:research

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.083

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.63

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.033

Eigen

Benign

-0.57

Eigen_PC

Benign

-0.50

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.36

M_CAP

Benign

0.011

MetaRNN

Benign

0.015

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.34

PhyloP100

0.67

PrimateAI

Benign

0.29

PROVEAN

Benign

0.67

REVEL

Benign

0.066

Sift

Uncertain

0.0090

Sift4G

Benign

0.30

Polyphen

0.0070

Vest4

0.039

MVP

0.51

MPC

0.034

ClinPred

0.029

GERP RS

3.9

Varity_R

0.090

gMVP

0.099

Mutation Taster

=85/15

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