This ABCA4 Sandwich ELISA Kit is an in-vitro enzyme-linked immunosorbent assay for the measurement of samples in human tissue homogenates, cell lysates or other biological fluids..
Applications
ELISA
Reactivity
Human
Sensitivity
0.112ng/mL
Detection Limit
0.312-20ng/mL
Note
STRICTLY FOR FURTHER SCIENTIFIC RESEARCH USE ONLY (RUO). MUST NOT TO BE USED IN DIAGNOSTIC OR THERAPEUTIC APPLICATIONS.
Product Properties
Storage Instruction
Store the unopened kit in the fridge at 2-8°C for up to 6 months. Once opened store individual kit contents according to components table provided with the kit.
tissue homogenates, cell lysates or other biological fluids.
Additional Info
Tissue Specificity
Retinal-specific. Seems to be exclusively found in the rims of rod photoreceptor cells.
Post Translational Modifications
Proteolytic cleavage by trypsin leads to a 120-kDa N-terminal fragment and a 115-kDa C-terminal fragment that are linked through disulfide bonds. N-glycosylated. Phosphorylation is independent of light exposure and modulates ATPase activity.
Function
Flippase that catalyzes in an ATP-dependent manner the transport of retinal-phosphatidylethanolamine conjugates like 11-cis and all-trans isomers of N-retinylidene-phosphatidylethanolamine (N-Ret-PE) from the lumen to the cytoplasmic leaflet of photoreceptor outer segment disk membranes, where 11-cis-retinylidene-phosphatidylethanolamine is then isomerized to its all-trans isomer and reduced by RDH8 to produce all-trans-retinol. This transport activity ensures that all-trans-retinal generated from photoexcitation and 11-cis-retinal not needed for the regeneration of rhodopsin and cone opsins are effectively cleared from the photoreceptors, therefore preventing their accumulation and the formation of toxic bisretinoid. Displays ATPase activity in vitro in absence of retinal substrate. May display GTPase activity that is strongly influenced by the lipid environment and the presence of retinoid compounds. Binds the unprotonated form of N-retinylidene-phosphatidylethanolamine with high affinity in the absence of ATP, and ATP binding and hydrolysis induce a protein conformational change that causes N-retinylidene-phosphatidylethanolamine release.
Protein Name
Retinal-Specific Phospholipid-Transporting Atpase Abca4Atp-Binding Cassette Sub-Family A Member 4Rim Abc TransporterRim ProteinvRmpRetinal-Specific Atp-Binding Cassette TransporterStargardt Disease Protein
MembraneMulti-Pass Membrane ProteinEndoplasmic ReticulumCytoplasmic VesicleCell ProjectionCiliumPhotoreceptor Outer SegmentLocalized To The Rim And Incisures Of Rod Outer Segments Disks
