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  • 1
    Publication Date: 2013-03-08
    Description: Recognition of sweet, bitter and umami tastes requires the non-vesicular release from taste bud cells of ATP, which acts as a neurotransmitter to activate afferent neural gustatory pathways. However, how ATP is released to fulfil this function is not fully understood. Here we show that calcium homeostasis modulator 1 (CALHM1), a voltage-gated ion channel, is indispensable for taste-stimuli-evoked ATP release from sweet-, bitter- and umami-sensing taste bud cells. Calhm1 knockout mice have severely impaired perceptions of sweet, bitter and umami compounds, whereas their recognition of sour and salty tastes remains mostly normal. Calhm1 deficiency affects taste perception without interfering with taste cell development or integrity. CALHM1 is expressed specifically in sweet/bitter/umami-sensing type II taste bud cells. Its heterologous expression induces a novel ATP permeability that releases ATP from cells in response to manipulations that activate the CALHM1 ion channel. Knockout of Calhm1 strongly reduces voltage-gated currents in type II cells and taste-evoked ATP release from taste buds without affecting the excitability of taste cells by taste stimuli. Thus, CALHM1 is a voltage-gated ATP-release channel required for sweet, bitter and umami taste perception.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3600154/" 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/PMC3600154/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Taruno, Akiyuki -- Vingtdeux, Valerie -- Ohmoto, Makoto -- Ma, Zhongming -- Dvoryanchikov, Gennady -- Li, Ang -- Adrien, Leslie -- Zhao, Haitian -- Leung, Sze -- Abernethy, Maria -- Koppel, Jeremy -- Davies, Peter -- Civan, Mortimer M -- Chaudhari, Nirupa -- Matsumoto, Ichiro -- Hellekant, Goran -- Tordoff, Michael G -- Marambaud, Philippe -- Foskett, J Kevin -- DC10393/DC/NIDCD NIH HHS/ -- EY13624/EY/NEI NIH HHS/ -- GM56328/GM/NIGMS NIH HHS/ -- MH059937/MH/NIMH NIH HHS/ -- NS072775/NS/NINDS NIH HHS/ -- P30 DC011735/DC/NIDCD NIH HHS/ -- P30 EY001583/EY/NEI NIH HHS/ -- P30DC011735/DC/NIDCD NIH HHS/ -- R01 DC006308/DC/NIDCD NIH HHS/ -- R01 DC010393/DC/NIDCD NIH HHS/ -- R01 EY013624/EY/NEI NIH HHS/ -- R01 MH059937/MH/NIMH NIH HHS/ -- R03 DC011143/DC/NIDCD NIH HHS/ -- R03DC011143/DC/NIDCD NIH HHS/ -- R21 NS072775/NS/NINDS NIH HHS/ -- R37 GM056328/GM/NIGMS NIH HHS/ -- England -- Nature. 2013 Mar 14;495(7440):223-6. doi: 10.1038/nature11906. Epub 2013 Mar 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23467090" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Animals ; Calcium Channels/deficiency/genetics/*metabolism ; Female ; HeLa Cells ; Humans ; Ion Channel Gating ; Male ; Membrane Glycoproteins/genetics/metabolism ; Mice ; Mice, Knockout ; Receptors, Purinergic/metabolism ; Single-Cell Analysis ; *Synaptic Transmission ; Taste/genetics/*physiology ; Taste Buds/cytology/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2014-11-21
    Description: To broaden our understanding of the evolution of gene regulation mechanisms, we generated occupancy profiles for 34 orthologous transcription factors (TFs) in human-mouse erythroid progenitor, lymphoblast and embryonic stem-cell lines. By combining the genome-wide transcription factor occupancy repertoires, associated epigenetic signals, and co-association patterns, here we deduce several evolutionary principles of gene regulatory features operating since the mouse and human lineages diverged. The genomic distribution profiles, primary binding motifs, chromatin states, and DNA methylation preferences are well conserved for TF-occupied sequences. However, the extent to which orthologous DNA segments are bound by orthologous TFs varies both among TFs and with genomic location: binding at promoters is more highly conserved than binding at distal elements. Notably, occupancy-conserved TF-occupied sequences tend to be pleiotropic; they function in several tissues and also co-associate with many TFs. Single nucleotide variants at sites with potential regulatory functions are enriched in occupancy-conserved TF-occupied sequences.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4343047/" 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/PMC4343047/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cheng, Yong -- Ma, Zhihai -- Kim, Bong-Hyun -- Wu, Weisheng -- Cayting, Philip -- Boyle, Alan P -- Sundaram, Vasavi -- Xing, Xiaoyun -- Dogan, Nergiz -- Li, Jingjing -- Euskirchen, Ghia -- Lin, Shin -- Lin, Yiing -- Visel, Axel -- Kawli, Trupti -- Yang, Xinqiong -- Patacsil, Dorrelyn -- Keller, Cheryl A -- Giardine, Belinda -- Mouse ENCODE Consortium -- Kundaje, Anshul -- Wang, Ting -- Pennacchio, Len A -- Weng, Zhiping -- Hardison, Ross C -- Snyder, Michael P -- 1U54HG00699/HG/NHGRI NIH HHS/ -- 3RC2HG005602/HG/NHGRI NIH HHS/ -- 5U54HG006996/HG/NHGRI NIH HHS/ -- R01 DK065806/DK/NIDDK NIH HHS/ -- R01 DK096266/DK/NIDDK NIH HHS/ -- R01 ES024992/ES/NIEHS NIH HHS/ -- R01 EY021482/EY/NEI NIH HHS/ -- R01 GM083337/GM/NIGMS NIH HHS/ -- R01 HG003988/HG/NHGRI NIH HHS/ -- R01 HG004037/HG/NHGRI NIH HHS/ -- R01 HG007175/HG/NHGRI NIH HHS/ -- R01 HG007348/HG/NHGRI NIH HHS/ -- R01 HG007354/HG/NHGRI NIH HHS/ -- R01DK065806/DK/NIDDK NIH HHS/ -- R01HG003988/HG/NHGRI NIH HHS/ -- R37 DK044746/DK/NIDDK NIH HHS/ -- RC2 HG005573/HG/NHGRI NIH HHS/ -- RC2 HG005602/HG/NHGRI NIH HHS/ -- RC2HG005573/HG/NHGRI NIH HHS/ -- U01 DE024427/DE/NIDCR NIH HHS/ -- U41 HG007234/HG/NHGRI NIH HHS/ -- U54 HG006996/HG/NHGRI NIH HHS/ -- U54 HG006997/HG/NHGRI NIH HHS/ -- U54 HG006998/HG/NHGRI NIH HHS/ -- U54 HG007004/HG/NHGRI NIH HHS/ -- U54HG006997/HG/NHGRI NIH HHS/ -- England -- Nature. 2014 Nov 20;515(7527):371-5. doi: 10.1038/nature13985.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Stanford University, Stanford, California 94305, USA. ; Program in Bioinformatics and Integrative Biology, Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA. ; 1] Center for Comparative Genomics and Bioinformatics, Huck Institutes of the Life Sciences, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA [2] BRCF Bioinformatics Core, University of Michigan, Ann Arbor, Michigan 48105, USA. ; Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St Louis, Missouri 63108, USA. ; Center for Comparative Genomics and Bioinformatics, Huck Institutes of the Life Sciences, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA. ; 1] Department of Genetics, Stanford University, Stanford, California 94305, USA [2] Division of Cardiovascular Medicine, Stanford University, Stanford, California 94304, USA. ; 1] Department of Genetics, Stanford University, Stanford, California 94305, USA [2] Department of Surgery, Washington University School of Medicine, St Louis, Missouri 63110, USA. ; 1] Lawrence Berkeley National Laboratory, Genomics Division, Berkeley, California 94701, USA [2] Department of Energy Joint Genome Institute, Walnut Creek, California 94598, USA [3] School of Natural Sciences, University of California, Merced, California 95343, USA. ; 1] Lawrence Berkeley National Laboratory, Genomics Division, Berkeley, California 94701, USA [2] Department of Energy Joint Genome Institute, Walnut Creek, California 94598, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25409826" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chromatin/genetics/metabolism ; Conserved Sequence/*genetics ; Enhancer Elements, Genetic/genetics ; Genome/*genetics ; *Genomics ; Humans ; Mice ; Polymorphism, Single Nucleotide/genetics ; Regulatory Sequences, Nucleic Acid/*genetics ; Transcription Factors/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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