This protein belongs to the lipocalin family and is the specific carrier for retinol in the blood. It delivers retinol from the liver stores to the peripheral tissues. In plasma, the RBP-retinol complex interacts with transthyretin which prevents its loss by filtration through the kidney glomeruli. A deficiency of vitamin A blocks secretion of the binding protein post translationally and results in defective delivery and supply to the epidermal cells.
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Protein Aliases: Plasma retinol binding protein 4 (PRBP); Plasma retinol-binding protein; Plasma retinol-binding protein(1-176); Plasma retinol-binding protein(1-179); Plasma retinol-binding protein(1-181); Plasma retinol-binding protein(1-182); PRBP; RBP; retinol; retinol binding; Retinol binding protein 4 interstitial; retinol binding protein 4, plasma; Retinol-binding protein 4; retinol-binding protein 4, interstitial
Gene Aliases: MCOPCB10; PRO2222; RBP4; RDCCAS
UniProt ID: (Human) P02753
Entrez Gene ID: (Human) 5950
Molecular Function: transfer/carrier protein