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  • Title: Promoter for a Brassica napus ribulose bisphosphate carboxylase/oxygenase small subunit gene binds multiple nuclear factors and contains a negative-strand open reading frame encoding a putative transmembrane protein.
    Author: Nantel AM, Lafleur F, Boivin R, Baszczynski CL, Bellemare G.
    Journal: Plant Mol Biol; 1991 Jun; 16(6):955-66. PubMed ID: 1863768.
    Abstract:
    Using a fractionated genomic bank, we have cloned and characterized a Brassica napus gene (rbcSF1) encoding the small sub-unit of ribulose 1,5-bisphosphate carboxylase. The promoter of this gene contains a 29 bp direct repeat capable of forming a single or a double hairpin loop, and three elements that are recognized by leaf nuclear proteins in vitro. The most upstream are the S-box, a small A/T-rich sequence between -516 and -512, and the F-box between -492 and -475. Finally, we have also observed binding to the G-box, a regulatory element common to numerous plant promoters. The promoter of rbcSF1 also has a 113 amino acids open reading frame (ORF113) in the non-coding strand. When used to probe a northern blot of leaf RNA, this ORF hybridizes to a 1.5 kb transcript. The protein encoded by ORF113 contains a transmembrane domain.
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