Retinol-Binding Protein 4 (RBP4) Antibody – Rabbit Polyclonal

This protein belongs to the lipocalin family and is the specific carrier for retinol (vitamin A alcohol) 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 posttranslationally and results in defective delivery and supply to the epidermal cells. [provided by RefSeq, Jul 2008]

RBP4: Delivers retinol from the liver stores to the peripheral tissues. In plasma, the RBP-retinol complex interacts with transthyretin, this prevents its loss by filtration through the kidney glomeruli. Defects in RBP4 are a cause of retinol-binding protein deficiency (RBP deficiency). This condition causes night vision problems. It produces a typical 'fundus xerophthalmicus', featuring a progressed atrophy of the retinal pigment epithelium. Belongs to the calycin superfamily. Lipocalin family.

Protein type: Secreted; Secreted, signal peptide

Chromosomal Location of Human Ortholog: 10q23.33

Cellular Component: cytosol; extracellular region; extracellular space; protein complex

Molecular Function: protein binding; protein heterodimerization activity; retinal binding; retinol binding

Biological Process: cardiac muscle development; embryonic organ morphogenesis; embryonic retina morphogenesis in camera-type eye; embryonic skeletal development; eye development; fat-soluble vitamin metabolic process; female genitalia morphogenesis; gluconeogenesis; glucose homeostasis; heart development; lung development; maintenance of gastrointestinal epithelium; negative regulation of cardiac muscle cell proliferation; phototransduction, visible light; positive regulation of immunoglobulin secretion; positive regulation of insulin secretion; response to ethanol; response to retinoic acid; retinoid metabolic process; retinol metabolic process; urinary bladder development; uterus development; vagina development; visual perception; vitamin metabolic process

Disease: Microphthalmia, Isolated, With Coloboma 10; Retinal Dystrophy, Iris Coloboma, And Comedogenic Acne Syndrome