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Mus304 encodes a novel DNA damage checkpoint protein required during Drosophila development.

ABSTRACT: Checkpoints block cell cycle progression in eukaryotic cells exposed to DNA damaging agents. We show that several Drosophila homologs of checkpoint genes, mei-41, grapes, and 14-3-3epsilon, regulate a DNA damage checkpoint in the developing eye. We have used this assay to show that the mutagen-sensitive gene mus304 is also required for this checkpoint. mus304 encodes a novel coiled-coil domain protein, which is targeted to the cytoplasm. Similar to mei-41, mus304 is required for chromosome break repair and for genomic stability. mus304 animals also exhibit three developmental defects, abnormal bristle morphology, decreased meiotic recombination, and arrested embryonic development. We suggest that these phenotypes reflect distinct developmental consequences of a single underlying checkpoint defect. Similar mechanisms may account for the puzzling array of symptoms observed in humans with mutations in the ATM tumor suppressor gene.

SUBMITTER: Brodsky MH

PROVIDER: S-EPMC316460 | biostudies-literature | 2000 Mar

REPOSITORIES: biostudies-literature

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Factors affecting lycopene oxidation in oil-in-water emulsions.

Boon Caitlin S CS Xu Zhimin Z Yue Xiaohua X McClements D Julian DJ Weiss Jochen J Decker Eric A EA

Journal of agricultural and food chemistry 20080201 4

Evidence that dietary lycopene decreases the risk for a number of health conditions has generated new opportunities for the addition of lycopene to functional foods. This work examined the potential of oil-in-water emulsions as a lycopene delivery system for foods. Oil-in-water emulsions containing lycopene were prepared using different kinds of surfactant (cationic, anionic, and nonionic) and oil types (corn oil, stripped corn oil, and hexadecane). The formation of fatty acid oxidation products ...[more]

PMID: 18237137

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