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 Pandolfosubject
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 Proteinsdescription
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.
year | journal | country | edition | language |
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1989-02-21 | Molecular and cellular biochemistry |