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  • 1
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    Chromosome alignment and segregation regulated by ubiquitination of survivin (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-12-03
    Description: Proper chromosome segregation requires the attachment of sister kinetochores to microtubules from opposite spindle poles to form bi-oriented chromosomes on the metaphase spindle. The chromosome passenger complex containing Survivin and the kinase Aurora B regulates this process from the centromeres. We report that a de-ubiquitinating enzyme, hFAM, regulates chromosome alignment and segregation by controlling both the dynamic association of Survivin with centromeres and the proper targeting of Survivin and Aurora B to centromeres. Survivin is ubiquitinated in mitosis through both Lys(48) and Lys(63) ubiquitin linkages. Lys(63) de-ubiquitination mediated by hFAM is required for the dissociation of Survivin from centromeres, whereas Lys(63) ubiquitination mediated by the ubiquitin binding protein Ufd1 is required for the association of Survivin with centromeres. Thus, ubiquitinaton regulates dynamic protein-protein interactions and chromosome segregation independently of protein degradation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vong, Queenie P -- Cao, Kan -- Li, Hoi Y -- Iglesias, Pablo A -- Zheng, Yixian -- GM56312/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2005 Dec 2;310(5753):1499-504.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Embryology, Carnegie Institution of Washington and Howard Hughes Medical Institute, 3520 San Martin Drive, Baltimore, MD 21218, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16322459" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Aurora Kinase B ; Aurora Kinases ; Centromere/*metabolism ; Chromosomal Proteins, Non-Histone/metabolism ; Chromosome Segregation/*physiology ; Egg Proteins/metabolism ; Endopeptidases/metabolism ; HeLa Cells ; Humans ; Inhibitor of Apoptosis Proteins ; Lysine/metabolism ; Microtubule-Associated Proteins/metabolism ; Molecular Sequence Data ; Neoplasm Proteins/metabolism ; Protein Binding ; Protein-Serine-Threonine Kinases/metabolism ; Ubiquitin/*metabolism ; Ubiquitin Thiolesterase ; Xenopus ; Xenopus Proteins/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    H2S as a physiologic vasorelaxant: hypertension in mice with deletion of cystathionine gamma-lyase (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-10-25
    Description: Studies of nitric oxide over the past two decades have highlighted the fundamental importance of gaseous signaling molecules in biology and medicine. The physiological role of other gases such as carbon monoxide and hydrogen sulfide (H2S) is now receiving increasing attention. Here we show that H2S is physiologically generated by cystathionine gamma-lyase (CSE) and that genetic deletion of this enzyme in mice markedly reduces H2S levels in the serum, heart, aorta, and other tissues. Mutant mice lacking CSE display pronounced hypertension and diminished endothelium-dependent vasorelaxation. CSE is physiologically activated by calcium-calmodulin, which is a mechanism for H2S formation in response to vascular activation. These findings provide direct evidence that H2S is a physiologic vasodilator and regulator of blood pressure.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2749494/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2749494/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, Guangdong -- Wu, Lingyun -- Jiang, Bo -- Yang, Wei -- Qi, Jiansong -- Cao, Kun -- Meng, Qinghe -- Mustafa, Asif K -- Mu, Weitong -- Zhang, Shengming -- Snyder, Solomon H -- Wang, Rui -- DA00074/DA/NIDA NIH HHS/ -- K05 DA000074/DA/NIDA NIH HHS/ -- K05 DA000074-29/DA/NIDA NIH HHS/ -- MH18501/MH/NIMH NIH HHS/ -- R37 MH018501/MH/NIMH NIH HHS/ -- R37 MH018501-40/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2008 Oct 24;322(5901):587-90. doi: 10.1126/science.1162667.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18948540" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/metabolism ; *Blood Pressure ; Calcium/metabolism ; Calmodulin/metabolism ; Cystathionine gamma-Lyase/deficiency/genetics/*metabolism ; Cysteine/blood ; Endothelium, Vascular/metabolism ; Homocysteine/blood ; Hydrogen Sulfide/blood/*metabolism ; Hypertension/*physiopathology ; Mesenteric Arteries/physiology ; Methacholine Chloride/pharmacology ; Mice ; Mice, Knockout ; Myocardium/metabolism ; Oxidation-Reduction ; Sulfides/pharmacology ; *Vasodilation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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