10-47348585-T-G
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Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The NM_002900.3(RBP3):āc.101T>Gā(p.Val34Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,613,176 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (ā ).
Frequency
Genomes: š 0.000020 ( 0 hom., cov: 33)
Exomes š: 6.8e-7 ( 0 hom. )
Consequence
RBP3
NM_002900.3 missense
NM_002900.3 missense
Scores
2
3
2
Clinical Significance
Conservation
PhyloP100: 7.62
Genes affected
RBP3 (HGNC:9921): (retinol binding protein 3) Interphotoreceptor retinol-binding protein is a large glycoprotein known to bind retinoids and found primarily in the interphotoreceptor matrix of the retina between the retinal pigment epithelium and the photoreceptor cells. It is thought to transport retinoids between the retinal pigment epithelium and the photoreceptors, a critical role in the visual process.The human IRBP gene is approximately 9.5 kbp in length and consists of four exons separated by three introns. The introns are 1.6-1.9 kbp long. The gene is transcribed by photoreceptor and retinoblastoma cells into an approximately 4.3-kilobase mRNA that is translated and processed into a glycosylated protein of 135,000 Da. The amino acid sequence of human IRBP can be divided into four contiguous homology domains with 33-38% identity, suggesting a series of gene duplication events. In the gene, the boundaries of these domains are not defined by exon-intron junctions, as might have been expected. The first three homology domains and part of the fourth are all encoded by the first large exon, which is 3,180 base pairs long. The remainder of the fourth domain is encoded in the last three exons, which are 191, 143, and approximately 740 base pairs long, respectively. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 2 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
RBP3 | NM_002900.3 | c.101T>G | p.Val34Gly | missense_variant | 1/4 | ENST00000584701.2 | NP_002891.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
RBP3 | ENST00000584701.2 | c.101T>G | p.Val34Gly | missense_variant | 1/4 | 1 | NM_002900.3 | ENSP00000463151.1 |
Frequencies
GnomAD3 genomes AF: 0.0000197 AC: 3AN: 152112Hom.: 0 Cov.: 33
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GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461064Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 726842
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GnomAD4 genome AF: 0.0000197 AC: 3AN: 152112Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0AN XY: 74306
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jun 26, 2020 | 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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C35"). This variant has not been reported in the literature in individuals with RBP3-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces valine with glycine at codon 34 of the RBP3 protein (p.Val34Gly). The valine residue is moderately conserved and there is a moderate physicochemical difference between valine and glycine. - |
Computational scores
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Name
Calibrated prediction
Score
Prediction
AlphaMissense
Uncertain
BayesDel_noAF
Pathogenic
CADD
Uncertain
DANN
Uncertain
DEOGEN2
Benign
T
LIST_S2
Benign
T
MetaRNN
Uncertain
T
Sift4G
Pathogenic
D
Vest4
gMVP
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at