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Anti-ABCA4 Antibody Picoband® Fluoro488 Conjugated

Product Specifications

Background

ABCA4 (ATP-Binding Cassette, Subfamily A, Member 4), also known as ABCR, is a protein which in humans is encoded by the ABCA4 gene. ABCA4 is a member of the ATP-binding cassette transporter gene sub-family A (ABC1) found exclusively in multicellular eukaryotes. Using a whole genome radiation hybrid panel, Allikmets et al. (1997) mapped the ABCR gene to 1p21-p13. Allikmets et al. (1997) localized ABCR transcripts exclusively within photoreceptor cells, indicating that ABCR mediates the transport of an essential molecule (or ion) either into or out of photoreceptor cells. Molday et al. (2000) showed by immunofluorescence microscopy and Western blot analysis that ABCR is present in foveal and peripheral cone, as well as rod, photoreceptors. The results suggested that the loss in central vision experienced by patients with Stargardt macular dystrophy arises ly from ABCR-mediated foveal cone degeneration.

Synonyms

Retinal-specific ATP-binding cassette transporter; ATP-binding cassette sub-family A member 4; RIM ABC transporter; RIM protein; RmP; Abca4; Abcr

Gene Name

ABCA4

Gene ID

11304

UniProt

O35600

Host

Rabbit

Reactivity

Mouse

Cross Reactivity

No cross-reactivity with other proteins

Immunogen

A synthetic peptide corresponding to a sequence at the C-terminus of mouse ABCA4, identical to the related rat sequence.

Clonality

Polyclonal

Tissue Specificity

Retinal-specific. Seems to be exclusively found in the rims of rod photoreceptor cells.

Applications

Flow Cytometry

Field of Research

Neuroscience, Sensory System, Visual System

Purification

Immunogen affinity purified.

Form

Liquid

Function

In the visual cycle, acts as an inward-ed retinoid flipase, retinoid substrates imported by ABCA4 from the extracellular or intradiscal (rod) membrane surfaces to the cytoplasmic membrane surface are all-trans-retinaldehyde (ATR) and N-retinyl-phosphatidyl-ethanolamine (NR-PE) . Once transported to the cytoplasmic surface, ATR is reduced to vitamin A by trans- retinol dehydrogenase (tRDH) and then transferred to the retinal pigment epithelium (RPE) where it is converted to 11-cis-retinal. May play a role in photoresponse, removing ATR/NR-PE from the extracellular photoreceptor surfaces during bleach recovery (By similarity) . .

References & Citations

1. Allikmets, R., Shroyer, N. F., Singh, N., Seddon, J. M., Lewis, R. A., Bernstein, P. S., Peiffer, A., Zabriskie, N. A., Hutchinson, A., Dean, M., Lupski, J. R., Leppert, M. Mutation of the Stargardt disease gene (ABCR) in age-related macular degeneration. Science 277: 1805-1807, 1997. 2. Allikmets, R., Singh, N., Sun, H., Shroyer, N. F., Hutchinson, A., Chidambaram, A., Gerrard, B., Baird, L., Stauffer, D., Peiffer, A., Rattner, A., Smallwood, P., Li, Y., Anderson, K. L., Lewis, R. A., Nathans, J., Leppert, M., Dean, M., Lupski, J. R. A photoreceptor cell-specific ATP-binding transporter gene (ABCR) is mutated in recessive Stargardt macular dystrophy. Nature Genet. 15: 236-246, 1997. Note: Erratum: Nature Genet. 17:122 only, 1997. 3. Molday, L. L., Rabin, A. R., Molday, R. S. ABCR expression in foveal cone photoreceptors and its role in Stargardt macular dystrophy. Nature Genet. 25: 257-258, 2000.

Storage Conditions

At -20 ̊C for one year from date of receipt. Avoid repeated freezing and thawing. Protect from light.

Calculated Molecular Weight

260209 MW

Specificity

No cross reactivity with other proteins.

Applications Notes

6

Gene Name Synonym

Retinal-specific ATP-binding cassette transporter

Subcellular Location

Membrane ; Multi-pass membrane protein . Localized to outer segment disk edges of rods and cones, with around one million copies/photoreceptor. .

Sequence Similarities

Belongs to the ABC transporter superfamily. ABCA family.

Protein Name

Retinal-specific ATP-binding cassette transporter

Isotype

Rabbit IgG

Contents

Each vial contains 50% glycerol, 0.9% NaCl, 0.2% Na2HPO4, 0.02% NaN3.

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