6533b831fe1ef96bd1299877

RESEARCH PRODUCT

Analysis of a soluble lipid-protein complex carrying endogenous 11-cis retinaldehyde from bovine retinal pigment epithelium.

Maria Concetta GueliLuisa TesoriereAntonino BonoMaria A. LivreaConcetta M.a. NicotraA. BongiornoLeonardo Pandolfo

subject

medicine.medical_treatmentPhagocytosisLipoproteinsClinical BiochemistryEndogenyBiologyPigmentRetinoidsCytosolmedicineAnimalsPigment Epithelium of EyeMolecular BiologyPhospholipidsTriglycerideschemistry.chemical_classificationCathepsinProteaseRetinal pigment epitheliumCell BiologyGeneral MedicineMolecular Weightmedicine.anatomical_structureCholesterolchemistryBiochemistryvisual_artRetinaldehydevisual_art.visual_art_mediumChromatography GelRetinaldehydeCattleElectrophoresis Polyacrylamide GelGlycoproteinCarrier Proteins

description

A soluble lipid-protein complex in bovine retinal pigment epithelium is shown to carry endogenous 11-cis retinaldehyde, in the extent of 15% of the total 11-cis retinaldehyde found in this tissue. The complex, analyzed with respect to its chemical composition, exhibits a lipid composition close resembling the lipid composition of the rod outer segment membrane; the SDS-PAGE evidences the presence of a number of protein bands, two of which of 34 and 27 kDa appear glycoproteins. Finally, the lipid-protein complex exhibits a discrete level of a Cathepsin D-like protease activity. From the above, the possibility is discussed that the soluble lipid-protein complex could represent some phagolysosomal inclusion occurring in the pigment epithelial cells upon rod outer segment phagocytosis.

10.1007/bf00577113https://pubmed.ncbi.nlm.nih.gov/2725486