RETINOL BINDING PROTEIN 4 (RBP4) Antibody – Mouse Monoclonal

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, signal peptide; Secreted

Chromosomal Location of Human Ortholog: 10q23.33

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

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

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

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