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Organization of the Abcr Gene - Analysis of Promoter and Splice Junction Sequences

  1. Author:
    Allikmets, R.
    Wasserman, W. W.
    Hutchinson, A.
    Smallwood, P.
    Nathans, J.
    Rogan, P. K.
    Schneider, T. D.
    Dean, M.

  2. Author Address

    Dean M, NCI, Lab Genom Divers, FCRDC, Frederick, MD 21702 USA NCI, Lab Genom Divers, FCRDC, Frederick, MD 21702 USA SAIC Frederick, Intramural Res Support Program, Frederick, MD 21702 USA SmithKline Beecham Pharmaceut, Bioinformat, King Of Prussia, PA 19406 USA Johns Hopkins Univ, Sch Med, Dept Mol Biol & Genet, Baltimore, MD 21205 USA Johns Hopkins Univ, Sch Med, Howard Hughes Med Inst, Baltimore, MD 21205 USA Johns Hopkins Univ, Sch Med, Dept Neurosci, Baltimore, MD 21205 USA Johns Hopkins Univ, Sch Med, Dept Ophthalmol, Baltimore, MD 21205 USA Allegheny Univ Hlth Sci, Dept Human Genet, Pittsburgh, PA 15212 USA NCI, Lab Expt & Computat Biol, FCRDC, Frederick, MD 21702 USA
    1. Year: 1998
  2. Journal: Gene
    1. 215
    2. 1
    3. Pages: 111-122
  4. Type of Article: Article
  1. Abstract:

    Mutations in the human ABCR gene have been associated with the autosomal recessive Stargardt disease (STGD), retinitis pigmentosa (RP19), and cone-rod dystrophy (CRD) and have also been found in a fraction of age-related macular degeneration (AMD) patients. The ABCR gene is st member of the ATP-binding cassette (ABC) transporter superfamily and encodes a rod photoreceptor-specific membrane protein. The cytogenetic location of the ABCR gene was refined to 1p22.3-1p22.2. The intron/exon structure was determined for the ABCR gene from overlapping genomic clones. ABCR spans over 100 kb and comprises 50 exons. Intron/exon splice site sequences are presented for all exons and analyzed for information content (Ri). Nine splice site sequence variants found in STGD and AMD patients are evaluated as potential mutations. The localization of splice sites reveals a high degree of conservation between other members of the ABC1 subfamily, e.g. the mouse Abc1 gene. Analysis of the 870-bp 5' upstream of the transcription start sequence reveals multiple putative photoreceptor-specific regulatory elements including a novel retina-specific transcription factor binding site. These results will be useful in further mutational screening of the ABCR gene in various retinopathies and for determining the substrate and/or function of this photoreceptor-specific ABC transporter. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 39]

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