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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Cai, Weili Johansen, Jørgen Girton, Jack Johansen, Kristen M. Krencik, Robert Deng, Huai Zhang, Weiguo Bao, Xiaomin |
| Description | Author Affiliation: Bao X ( Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011, USA.) |
| Abstract | The JIL-1 histone H3S10 kinase in Drosophila localizes specifically to euchromatic interband regions of polytene chromosomes and is enriched 2-fold on the male X chromosome. JIL-1 can be divided into four main domains including an NH(2)-terminal domain, two separate kinase domains, and a COOH-terminal domain. Our results demonstrate that the COOH-terminal domain of JIL-1 is necessary and sufficient for correct chromosome targeting to autosomes but that both COOH- and NH(2)-terminal sequences are necessary for enrichment on the male X chromosome. We furthermore show that a small 53-amino acid region within the COOH-terminal domain can interact with the tail region of histone H3, suggesting that this interaction is necessary for the correct chromatin targeting of the JIL-1 kinase. Interestingly, our data indicate that the COOH-terminal domain alone is sufficient to rescue JIL-1 null mutant polytene chromosome defects including those of the male X chromosome. Nonetheless, we also found that a truncated JIL-1 protein which was without the COOH-terminal domain but retained histone H3S10 kinase activity was able to rescue autosome as well as partially rescue male X polytene chromosome morphology. Taken together these findings indicate that JIL-1 may participate in regulating chromatin structure by multiple and partially redundant mechanisms. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 47 |
| Volume Number | 283 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2008-11-21 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Chromatin Chemistry Drosophila Proteins Histones Protein-Serine-Threonine Kinases Animals Chromosomes Ultrastructure Metabolism Drosophila Melanogaster Gene Deletion Microscopy, Fluorescence Models, Biological Molecular Conformation Mutation Protein Binding Protein Structure, Tertiary Recombinant Fusion Proteins Research Support, N.I.H., Extramural Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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