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winged-helix transcription factor JUMU regulates development, nucleolus morphology and function, and chromatin organization of Drosophila melanogaster
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winged-helix transcription factor JUMU regulates development, nucleolus morphology and function, and chromatin organization of Drosophila melanogaster
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Journal Article
winged-helix transcription factor JUMU regulates development, nucleolus morphology and function, and chromatin organization of Drosophila melanogaster
2010
Overview
The PEV-modifying winged-helix/forkhead domain transcription factor JUMU of Drosophila is an essential protein of pleiotropic function. The correct gene dose of jumu is required for nucleolar integrity and correct nucleolus function. Overexpression of jumu results in bloating of euchromatic chromosome arms, displacement of the JUMU protein from the chromocenter and the nucleolus, fragile weak points, and disrupted chromocenter of polytene chromosomes. Overexpression of the acidic C terminus of JUMU alone causes nucleolus disorganization. In addition, euchromatic genes are overexpressed and HP1, which normally accumulates in the pericentric heterochromatin and spreads into euchromatic chromosome arms, although H3-K9 di-methylation remains restricted to the pericentric heterochromatin. The human winged-helix nude gene shows similarities to jumu and its overexpression in Drosophila causes bristle mutations.
Publisher
Dordrecht : Springer Netherlands,Springer Netherlands,Springer Nature B.V
Subject
/ Animal Genetics and Genomics
/ Animals
/ Biomedical and Life Sciences
/ cytology
/ Drosophila melanogaster - growth & development
/ Drosophila melanogaster - metabolism
/ Drosophila Proteins - chemistry
/ Drosophila Proteins - genetics
/ Drosophila Proteins - metabolism
/ genes
/ genetics
/ Insects
/ Larva
/ mutation
/ Proteins
/ Salivary Glands - metabolism
/ Transcription Factors - chemistry
/ Transcription Factors - genetics
