OTX2 homeodomain protein binds a DNA element necessary for interphotoreceptor retinoid binding protein gene expression

Nicoletta Bobola, Paola Briata, Cristina Ilengo, Nadia Rosatto, Cheryl Craft, Giorgio Corte, Roberto Ravazzolo

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Transcription of the human interphotoreceptor retinoid binding protein (IRBP) gene is strictly tissue specific, being restricted to retinal photoreceptors and pinealocytes. We have previously demonstrated that a sequence named A element, in the IRBP promoter is essential for IRBP gene transcription in vivo. Here we demonstrate that the human homeodomain protein OTX2 is present in nuclear extracts of IRBP expressing cells and specifically interacts with the IRBP A promoter element in vitro. OTX2, as well as CRX, a homeodomain protein very similar to OTX2, activates the human IRBP promoter in co-transfection experiments.
    Original languageEnglish
    Pages (from-to)165-169
    Number of pages4
    JournalMechanisms of Development
    Volume82
    Issue number1-2
    DOIs
    Publication statusPublished - 1 Apr 1999

    Keywords

    • Bicoid
    • CRX
    • Developmen t
    • Dro sophila
    • Eye
    • Gel retardation
    • Gene
    • HeLa
    • Homeodomain
    • Human
    • Immunohistochemistry
    • Interphotoreceptor retinoid binding protein
    • IRBP
    • OTX2
    • Photoreceptors
    • Promoter
    • Retina
    • Retinoblastoma
    • Supershift
    • Transcriptional regulation
    • Transfection
    • Vertebrate
    • WERI- Rb1

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