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  • Histones/*metabolism  (2)
  • American Association for the Advancement of Science (AAAS)  (2)
  • 1
    Publication Date: 2009-12-08
    Description: Bub1 is a multi-task protein kinase required for proper chromosome segregation in eukaryotes. Impairment of Bub1 in humans may lead to chromosomal instability (CIN) or tumorigenesis. Yet, the primary cellular substrate of Bub1 has remained elusive. Here, we show that Bub1 phosphorylates the conserved serine 121 of histone H2A in fission yeast Schizosaccharomyces pombe. The h2a-SA mutant, in which all cellular H2A-S121 is replaced by alanine, phenocopies the bub1 kinase-dead mutant (bub1-KD) in losing the centromeric localization of shugoshin proteins. Artificial tethering of shugoshin to centromeres largely restores the h2a-SA or bub1-KD-related CIN defects, a function that is evolutionally conserved. Thus, Bub1 kinase creates a mark for shugoshin localization and the correct partitioning of chromosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kawashima, Shigehiro A -- Yamagishi, Yuya -- Honda, Takashi -- Ishiguro, Kei-ichiro -- Watanabe, Yoshinori -- New York, N.Y. -- Science. 2010 Jan 8;327(5962):172-7. doi: 10.1126/science.1180189. Epub 2009 Nov 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Chromosome Dynamics, Institute of Molecular and Cellular Biosciences, University of Tokyo, Yayoi, Tokyo 113-0032, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965387" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Centromere/*metabolism ; *Chromosomal Instability ; Chromosomal Proteins, Non-Histone/genetics/*metabolism ; *Chromosome Segregation ; Chromosomes, Fungal/metabolism ; Histones/*metabolism ; Humans ; Kinetochores/metabolism ; Meiosis ; Mice ; Mitosis ; Nucleosomes/metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Recombinant Proteins/metabolism ; Saccharomyces cerevisiae/genetics/metabolism ; Saccharomyces cerevisiae Proteins/genetics/metabolism ; Schizosaccharomyces/cytology/genetics/*metabolism ; Schizosaccharomyces pombe Proteins/genetics/*metabolism ; Serine/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2010-10-12
    Description: For proper partitioning of chromosomes in mitosis, the chromosomal passenger complex (CPC) including Aurora B and survivin must be localized at the center of paired kinetochores, at the site called the inner centromere. It is largely unknown what defines the inner centromere and how the CPC is targeted to this site. Here, we show that the phosphorylation of histone H3-threonine 3 (H3-pT3) mediated by Haspin cooperates with Bub1-mediated histone 2A-serine 121 (H2A-S121) phosphorylation in targeting the CPC to the inner centromere in fission yeast and human cells. H3-pT3 promotes nucleosome binding of survivin, whereas phosphorylated H2A-S121 facilitates the binding of shugoshin, the centromeric CPC adaptor. Haspin colocalizes with cohesin by associating with Pds5, whereas Bub1 localizes at kinetochores. Thus, the inner centromere is defined by intersection of two histone kinases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamagishi, Yuya -- Honda, Takashi -- Tanno, Yuji -- Watanabe, Yoshinori -- New York, N.Y. -- Science. 2010 Oct 8;330(6001):239-43. doi: 10.1126/science.1194498.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Chromosome Dynamics, Institute of Molecular and Cellular Biosciences, University of Tokyo, Yayoi, Tokyo 113-0032, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20929775" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Aurora Kinase B ; Aurora Kinases ; Cell Cycle Proteins/metabolism ; Centromere/*metabolism ; Chromatin/metabolism ; Chromosomal Proteins, Non-Histone/metabolism ; Chromosome Segregation ; Chromosomes, Fungal/*physiology ; Chromosomes, Human/*physiology ; HeLa Cells ; Heterochromatin/metabolism ; Histones/*metabolism ; Humans ; Inhibitor of Apoptosis Proteins ; Intracellular Signaling Peptides and Proteins/chemistry/genetics/*metabolism ; Kinetochores/metabolism ; Microtubule-Associated Proteins/metabolism ; Mitosis ; Molecular Sequence Data ; Mutation ; Nucleosomes/metabolism ; Phosphorylation ; Protein Binding ; Protein Interaction Domains and Motifs ; Protein-Serine-Threonine Kinases/chemistry/genetics/*metabolism ; Schizosaccharomyces/*genetics/metabolism ; Schizosaccharomyces pombe Proteins/genetics/*metabolism ; Serine/metabolism ; Threonine/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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