Tbio RBP3 Retinol-binding protein 3

Protein Summary

Description

IRBP shuttles 11-cis and all trans retinoids between the retinol isomerase in the pigment epithelium and the visual pigments in the photoreceptor cells of the retina. 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]

Uniprot Accession IDs

• P10745
• Q0QD34
• Q5VSR0
• Q8IXN0

Gene Name

• RBP3

Ensembl ID

• ENST00000584701
• ENSP00000463151
• ENSG00000265203

Symbol

• IRBP
• RBPI
• RP66
• D10S64
• D10S65
• D10S66

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
cell type or tissue	0.61
cell line	0.59
molecular function	0.56
tissue	0.54
disease	0.43

Protein Classes

No PANTHER Classes or DTO Classes found

IDG Development Level Summary

Tdark

These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 558.56   (req: < 5)

Gene RIFs: 15   (req: <= 3)

Antibodies: 209   (req: <= 50)

Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 558.56   (req: >= 5)

Gene RIFs: 15   (req: > 3)

Antibodies: 209   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 7

Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligand: 0

Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drug: 0