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  • 1
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    The major genetic determinants of HIV-1 control affect HLA class I peptide presentation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-06
    Description: Infectious and inflammatory diseases have repeatedly shown strong genetic associations within the major histocompatibility complex (MHC); however, the basis for these associations remains elusive. To define host genetic effects on the outcome of a chronic viral infection, we performed genome-wide association analysis in a multiethnic cohort of HIV-1 controllers and progressors, and we analyzed the effects of individual amino acids within the classical human leukocyte antigen (HLA) proteins. We identified 〉300 genome-wide significant single-nucleotide polymorphisms (SNPs) within the MHC and none elsewhere. Specific amino acids in the HLA-B peptide binding groove, as well as an independent HLA-C effect, explain the SNP associations and reconcile both protective and risk HLA alleles. These results implicate the nature of the HLA-viral peptide interaction as the major factor modulating durable control of HIV infection.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3235490/" 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/PMC3235490/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉International HIV Controllers Study -- Pereyra, Florencia -- Jia, Xiaoming -- McLaren, Paul J -- Telenti, Amalio -- de Bakker, Paul I W -- Walker, Bruce D -- Ripke, Stephan -- Brumme, Chanson J -- Pulit, Sara L -- Carrington, Mary -- Kadie, Carl M -- Carlson, Jonathan M -- Heckerman, David -- Graham, Robert R -- Plenge, Robert M -- Deeks, Steven G -- Gianniny, Lauren -- Crawford, Gabriel -- Sullivan, Jordan -- Gonzalez, Elena -- Davies, Leela -- Camargo, Amy -- Moore, Jamie M -- Beattie, Nicole -- Gupta, Supriya -- Crenshaw, Andrew -- Burtt, Noel P -- Guiducci, Candace -- Gupta, Namrata -- Gao, Xiaojiang -- Qi, Ying -- Yuki, Yuko -- Piechocka-Trocha, Alicja -- Cutrell, Emily -- Rosenberg, Rachel -- Moss, Kristin L -- Lemay, Paul -- O'Leary, Jessica -- Schaefer, Todd -- Verma, Pranshu -- Toth, Ildiko -- Block, Brian -- Baker, Brett -- Rothchild, Alissa -- Lian, Jeffrey -- Proudfoot, Jacqueline -- Alvino, Donna Marie L -- Vine, Seanna -- Addo, Marylyn M -- Allen, Todd M -- Altfeld, Marcus -- Henn, Matthew R -- Le Gall, Sylvie -- Streeck, Hendrik -- Haas, David W -- Kuritzkes, Daniel R -- Robbins, Gregory K -- Shafer, Robert W -- Gulick, Roy M -- Shikuma, Cecilia M -- Haubrich, Richard -- Riddler, Sharon -- Sax, Paul E -- Daar, Eric S -- Ribaudo, Heather J -- Agan, Brian -- Agarwal, Shanu -- Ahern, Richard L -- Allen, Brady L -- Altidor, Sherly -- Altschuler, Eric L -- Ambardar, Sujata -- Anastos, Kathryn -- Anderson, Ben -- Anderson, Val -- Andrady, Ushan -- Antoniskis, Diana -- Bangsberg, David -- Barbaro, Daniel -- Barrie, William -- Bartczak, J -- Barton, Simon -- Basden, Patricia -- Basgoz, Nesli -- Bazner, Suzane -- Bellos, Nicholaos C -- Benson, Anne M -- Berger, Judith -- Bernard, Nicole F -- Bernard, Annette M -- Birch, Christopher -- Bodner, Stanley J -- Bolan, Robert K -- Boudreaux, Emilie T -- Bradley, Meg -- Braun, James F -- Brndjar, Jon E -- Brown, Stephen J -- Brown, Katherine -- Brown, Sheldon T -- Burack, Jedidiah -- Bush, Larry M -- Cafaro, Virginia -- Campbell, Omobolaji -- Campbell, John -- Carlson, Robert H -- Carmichael, J Kevin -- Casey, Kathleen K -- Cavacuiti, Chris -- Celestin, Gregory -- Chambers, Steven T -- Chez, Nancy -- Chirch, Lisa M -- Cimoch, Paul J -- Cohen, Daniel -- Cohn, Lillian E -- Conway, Brian -- Cooper, David A -- Cornelson, Brian -- Cox, David T -- Cristofano, Michael V -- Cuchural, George Jr -- Czartoski, Julie L -- Dahman, Joseph M -- Daly, Jennifer S -- Davis, Benjamin T -- Davis, Kristine -- Davod, Sheila M -- DeJesus, Edwin -- Dietz, Craig A -- Dunham, Eleanor -- Dunn, Michael E -- Ellerin, Todd B -- Eron, Joseph J -- Fangman, John J W -- Farel, Claire E -- Ferlazzo, Helen -- Fidler, Sarah -- Fleenor-Ford, Anita -- Frankel, Renee -- Freedberg, Kenneth A -- French, Neel K -- Fuchs, Jonathan D -- Fuller, Jon D -- Gaberman, Jonna -- Gallant, Joel E -- Gandhi, Rajesh T -- Garcia, Efrain -- Garmon, Donald -- Gathe, Joseph C Jr -- Gaultier, Cyril R -- Gebre, Wondwoosen -- Gilman, Frank D -- Gilson, Ian -- Goepfert, Paul A -- Gottlieb, Michael S -- Goulston, Claudia -- Groger, Richard K -- Gurley, T Douglas -- Haber, Stuart -- Hardwicke, Robin -- Hardy, W David -- Harrigan, P Richard -- Hawkins, Trevor N -- Heath, Sonya -- Hecht, Frederick M -- Henry, W Keith -- Hladek, Melissa -- Hoffman, Robert P -- Horton, James M -- Hsu, Ricky K -- Huhn, Gregory D -- Hunt, Peter -- Hupert, Mark J -- Illeman, Mark L -- Jaeger, Hans -- Jellinger, Robert M -- John, Mina -- Johnson, Jennifer A -- Johnson, Kristin L -- Johnson, Heather -- Johnson, Kay -- Joly, Jennifer -- Jordan, Wilbert C -- Kauffman, Carol A -- Khanlou, Homayoon -- Killian, Robert K -- Kim, Arthur Y -- Kim, David D -- Kinder, Clifford A -- Kirchner, Jeffrey T -- Kogelman, Laura -- Kojic, Erna Milunka -- Korthuis, P Todd -- Kurisu, Wayne -- Kwon, Douglas S -- LaMar, Melissa -- Lampiris, Harry -- Lanzafame, Massimiliano -- Lederman, Michael M -- Lee, David M -- Lee, Jean M L -- Lee, Marah J -- Lee, Edward T Y -- Lemoine, Janice -- Levy, Jay A -- Llibre, Josep M -- Liguori, Michael A -- Little, Susan J -- Liu, Anne Y -- Lopez, Alvaro J -- Loutfy, Mono R -- Loy, Dawn -- Mohammed, Debbie Y -- Man, Alan -- Mansour, Michael K -- Marconi, Vincent C -- Markowitz, Martin -- Marques, Rui -- Martin, Jeffrey N -- Martin, Harold L Jr -- Mayer, Kenneth Hugh -- McElrath, M Juliana -- McGhee, Theresa A -- McGovern, Barbara H -- McGowan, Katherine -- McIntyre, Dawn -- Mcleod, Gavin X -- Menezes, Prema -- Mesa, Greg -- Metroka, Craig E -- Meyer-Olson, Dirk -- Miller, Andy O -- Montgomery, Kate -- Mounzer, Karam C -- Nagami, Ellen H -- Nagin, Iris -- Nahass, Ronald G -- Nelson, Margret O -- Nielsen, Craig -- Norene, David L -- O'Connor, David H -- Ojikutu, Bisola O -- Okulicz, Jason -- Oladehin, Olakunle O -- Oldfield, Edward C 3rd -- Olender, Susan A -- Ostrowski, Mario -- Owen, William F Jr -- Pae, Eunice -- Parsonnet, Jeffrey -- Pavlatos, Andrew M -- Perlmutter, Aaron M -- Pierce, Michael N -- Pincus, Jonathan M -- Pisani, Leandro -- Price, Lawrence Jay -- Proia, Laurie -- Prokesch, Richard C -- Pujet, Heather Calderon -- Ramgopal, Moti -- Rathod, Almas -- Rausch, Michael -- Ravishankar, J -- Rhame, Frank S -- Richards, Constance Shamuyarira -- Richman, Douglas D -- Rodes, Berta -- Rodriguez, Milagros -- Rose, Richard C 3rd -- Rosenberg, Eric S -- Rosenthal, Daniel -- Ross, Polly E -- Rubin, David S -- Rumbaugh, Elease -- Saenz, Luis -- Salvaggio, Michelle R -- Sanchez, William C -- Sanjana, Veeraf M -- Santiago, Steven -- Schmidt, Wolfgang -- Schuitemaker, Hanneke -- Sestak, Philip M -- Shalit, Peter -- Shay, William -- Shirvani, Vivian N -- Silebi, Vanessa I -- Sizemore, James M Jr -- Skolnik, Paul R -- Sokol-Anderson, Marcia -- Sosman, James M -- Stabile, Paul -- Stapleton, Jack T -- Starrett, Sheree -- Stein, Francine -- Stellbrink, Hans-Jurgen -- Sterman, F Lisa -- Stone, Valerie E -- Stone, David R -- Tambussi, Giuseppe -- Taplitz, Randy A -- Tedaldi, Ellen M -- Theisen, William -- Torres, Richard -- Tosiello, Lorraine -- Tremblay, Cecile -- Tribble, Marc A -- Trinh, Phuong D -- Tsao, Alice -- Ueda, Peggy -- Vaccaro, Anthony -- Valadas, Emilia -- Vanig, Thanes J -- Vecino, Isabel -- Vega, Vilma M -- Veikley, Wenoah -- Wade, Barbara H -- Walworth, Charles -- Wanidworanun, Chingchai -- Ward, Douglas J -- Warner, Daniel A -- Weber, Robert D -- Webster, Duncan -- Weis, Steve -- Wheeler, David A -- White, David J -- Wilkins, Ed -- Winston, Alan -- Wlodaver, Clifford G -- van't Wout, Angelique -- Wright, David P -- Yang, Otto O -- Yurdin, David L -- Zabukovic, Brandon W -- Zachary, Kimon C -- Zeeman, Beth -- Zhao, Meng -- AI030914/AI/NIAID NIH HHS/ -- AI068636/AI/NIAID NIH HHS/ -- AI069415/AI/NIAID NIH HHS/ -- AI069419/AI/NIAID NIH HHS/ -- AI069423/AI/NIAID NIH HHS/ -- AI069424/AI/NIAID NIH HHS/ -- AI069428/AI/NIAID NIH HHS/ -- AI069432/AI/NIAID NIH HHS/ -- AI069434/AI/NIAID NIH HHS/ -- AI069450/AI/NIAID NIH HHS/ -- AI069452/AI/NIAID NIH HHS/ -- AI069465/AI/NIAID NIH HHS/ -- AI069471/AI/NIAID NIH HHS/ -- AI069472/AI/NIAID NIH HHS/ -- AI069474/AI/NIAID NIH HHS/ -- AI069477/AI/NIAID NIH HHS/ -- AI069484/AI/NIAID NIH HHS/ -- AI069495/AI/NIAID NIH HHS/ -- AI069501/AI/NIAID NIH HHS/ -- AI069502/AI/NIAID NIH HHS/ -- AI069511/AI/NIAID NIH HHS/ -- AI069513/AI/NIAID NIH HHS/ -- AI069532/AI/NIAID NIH HHS/ -- AI069556/AI/NIAID NIH HHS/ -- AI077505/AI/NIAID NIH HHS/ -- AI087145/AI/NIAID NIH HHS/ -- AI25859/AI/NIAID NIH HHS/ -- AI27661/AI/NIAID NIH HHS/ -- AI28568/AI/NIAID NIH HHS/ -- AI30914/AI/NIAID NIH HHS/ -- AI34835/AI/NIAID NIH HHS/ -- AI34853/AI/NIAID NIH HHS/ -- AI38844/AI/NIAID NIH HHS/ -- AI46370/AI/NIAID NIH HHS/ -- AI68634/AI/NIAID NIH HHS/ -- AI69467/AI/NIAID NIH HHS/ -- AL32782/PHS HHS/ -- HHSN261200800001E/PHS HHS/ -- K23 DA019809/DA/NIDA NIH HHS/ -- K24 AI051966/AI/NIAID NIH HHS/ -- K24 AI064086/AI/NIAID NIH HHS/ -- K24 AI064086-05/AI/NIAID NIH HHS/ -- K24 AI069994/AI/NIAID NIH HHS/ -- K24 AI069994-04/AI/NIAID NIH HHS/ -- K24 AI069994-05/AI/NIAID NIH HHS/ -- K24AI069994/AI/NIAID NIH HHS/ -- KL2 RR024977/RR/NCRR NIH HHS/ -- MH071205/MH/NIMH NIH HHS/ -- MH085520/MH/NIMH NIH HHS/ -- P-30 AI27763/AI/NIAID NIH HHS/ -- P-30-AI060354/AI/NIAID NIH HHS/ -- P30 AI027763/AI/NIAID NIH HHS/ -- P30 AI027763-19/AI/NIAID NIH HHS/ -- P30 AI027763-20/AI/NIAID NIH HHS/ -- P30 AI050410/AI/NIAID NIH HHS/ -- P30 AI060354/AI/NIAID NIH HHS/ -- P30 AI060354-08/AI/NIAID NIH HHS/ -- P30 AI060354-09/AI/NIAID NIH HHS/ -- R01 AI028568/AI/NIAID NIH HHS/ -- R01 AI028568-18/AI/NIAID NIH HHS/ -- R01 AI028568-19/AI/NIAID NIH HHS/ -- R01 AI028568-20/AI/NIAID NIH HHS/ -- R01 AI030914/AI/NIAID NIH HHS/ -- R01 AI030914-16/AI/NIAID NIH HHS/ -- R01 AI030914-17/AI/NIAID NIH HHS/ -- R01 AI077505/AI/NIAID NIH HHS/ -- R01 AI077505-04/AI/NIAID NIH HHS/ -- R01 AI077505-05/AI/NIAID NIH HHS/ -- R01 AI087145/AI/NIAID NIH HHS/ -- R01 AI087145-01/AI/NIAID NIH HHS/ -- R01 AI087145-02/AI/NIAID NIH HHS/ -- R01 MH054907/MH/NIMH NIH HHS/ -- R01 MH071205/MH/NIMH NIH HHS/ -- R01 MH071205-04/MH/NIMH NIH HHS/ -- R01 MH071205-05/MH/NIMH NIH HHS/ -- R24 AI067039/AI/NIAID NIH HHS/ -- R24 AI067039-06/AI/NIAID NIH HHS/ -- R24 AI067039-07/AI/NIAID NIH HHS/ -- R37 AI028568/AI/NIAID NIH HHS/ -- R37 AI028568-15/AI/NIAID NIH HHS/ -- RR024975/RR/NCRR NIH HHS/ -- T32 AI007061/AI/NIAID NIH HHS/ -- TL1 RR024978/RR/NCRR NIH HHS/ -- U01 AI027661-18/AI/NIAID NIH HHS/ -- U01 AI027661-19/AI/NIAID NIH HHS/ -- U01 AI032782-13/AI/NIAID NIH HHS/ -- U01 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HHS/ -- U01 AI069484-06/AI/NIAID NIH HHS/ -- U01 AI069495/AI/NIAID NIH HHS/ -- U01 AI069495-05/AI/NIAID NIH HHS/ -- U01 AI069495-06/AI/NIAID NIH HHS/ -- U01 AI069501/AI/NIAID NIH HHS/ -- U01 AI069501-05/AI/NIAID NIH HHS/ -- U01 AI069501-06/AI/NIAID NIH HHS/ -- U01 AI069502/AI/NIAID NIH HHS/ -- U01 AI069502-05/AI/NIAID NIH HHS/ -- U01 AI069502-06/AI/NIAID NIH HHS/ -- U01 AI069511/AI/NIAID NIH HHS/ -- U01 AI069511-05/AI/NIAID NIH HHS/ -- U01 AI069511-06/AI/NIAID NIH HHS/ -- U01 AI069513-05/AI/NIAID NIH HHS/ -- U01 AI069513-06/AI/NIAID NIH HHS/ -- U01 AI069532/AI/NIAID NIH HHS/ -- U01 AI069532-05/AI/NIAID NIH HHS/ -- U01 AI069532-06/AI/NIAID NIH HHS/ -- U01 AI069556-05/AI/NIAID NIH HHS/ -- U01 AI069556-06/AI/NIAID NIH HHS/ -- U01 MH085520/MH/NIMH NIH HHS/ -- U01 MH085520-01/MH/NIMH NIH HHS/ -- UL1 RR024131/RR/NCRR NIH HHS/ -- UL1 RR024131-06/RR/NCRR NIH HHS/ -- UL1 RR024131-07/RR/NCRR NIH HHS/ -- UL1 RR024975/RR/NCRR NIH HHS/ -- UL1 RR024975-04/RR/NCRR NIH HHS/ -- UL1 RR024975-05/RR/NCRR NIH HHS/ -- UM1 AI068634/AI/NIAID NIH HHS/ -- UM1 AI068634-06/AI/NIAID NIH HHS/ -- UM1 AI068634-07/AI/NIAID NIH HHS/ -- UM1 AI068636-06/AI/NIAID NIH HHS/ -- UM1 AI068636-07/AI/NIAID NIH HHS/ -- UM1 AI069477/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 Dec 10;330(6010):1551-7. doi: 10.1126/science.1195271. Epub 2010 Nov 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology (MIT) and Harvard, Boston, MA, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21051598" target="_blank"〉PubMed〈/a〉
    Keywords: African Americans/genetics ; Alleles ; Amino Acids/physiology ; *Antigen Presentation ; CD8-Positive T-Lymphocytes/immunology ; Cohort Studies ; Disease Progression ; European Continental Ancestry Group/genetics ; *Genes, MHC Class I ; Genome-Wide Association Study ; HIV Antigens/immunology ; HIV Infections/ethnology/*genetics/*immunology/virology ; HIV Long-Term Survivors ; *HIV-1/immunology ; HLA-A Antigens/chemistry/genetics/immunology/metabolism ; HLA-B Antigens/chemistry/*genetics/immunology/metabolism ; HLA-C Antigens/chemistry/genetics/immunology/metabolism ; Haplotypes ; Hispanic Americans/genetics ; Humans ; Immunity, Innate ; Logistic Models ; Models, Molecular ; Polymorphism, Single Nucleotide ; Protein Conformation ; Viral Load
    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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    Plasma homovanillic acid concentration and the severity of schizophrenic illness (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-03-29
    Description: Concentrations of plasma homovanillic acid before treatment were highly correlated with global severity of illness in schizophrenic patients, both before and after treatment. In contrast, a fixed dose of haloperidol did not affect those concentrations. Thus, in patients with a diagnosis of schizophrenia, plasma homovanillic acid may reflect the severity of illness, but not be influenced by short-term pharmacological perturbations by neuroleptics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, K L -- Davidson, M -- Mohs, R C -- Kendler, K S -- Davis, B M -- Johns, C A -- DeNigris, Y -- Horvath, T B -- MH37922/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1985 Mar 29;227(4694):1601-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3975630" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Haloperidol/pharmacology ; Homovanillic Acid/*blood ; Humans ; Male ; Phenylacetates/*blood ; Schizophrenia/*blood
    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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  • 3
    Electronic Resource
    Electronic Resource
    The cytoskeleton of murine leukemia virus (MuLV)-infected mouse fibroblasts as observed under varying conditions of formaldehyde fixation (1983)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 3 (1983), S. 567-577 
    Details
    ISSN: 0886-1544
    Keywords: cytoskeleton ; murine leukemia viruses ; formaldehyde fixation ; membrane permeability ; immunofluorescence ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Mouse fibroblasts chronically infected with Moloney murine leukemia virus (MuLV) were fixed using variable amounts of formaldehyde, then examined by indirect immunofluorescence light microscopy. Several antisera were employed to detect both external and internal antigens associated with the cells, eg, MuLV gp70, tubulin, vimentin, and actin. Our results indicate that the cell membranes could be partially permeabilized to IgG molecules directed against the three cytoskeletal antigens only after 3.7%, but not 1%, formaldehyde treatment. Complete permeabilization was achieved by subsequent acetone treatment of cells after 3.7% formaldehyde fixation. In such cells, normal-appearing cytoskeletal networks of microtubules and intermediate filaments were observed. Stress fibers were also seen; however, they appeared less numerous and thinner than those of uninfected mouse fibroblasts. Further, a significant amounts of F-actin fluorescence was localized in granules in the cytoplasm of infected cells. Similar observations were made using JLS-V9 mouse cells chronically infected with 334C virus, another MuLV. These results taken together suggest that subtle differences exist in the organization of actin within MuLV-infected and uninfected mouse fibroblasts.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cm.970030523
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  • 4
    Electronic Resource
    Electronic Resource
    Protein phosphorylation and dynamics of cytoskeletal structures associated with basal bodies in Paramecium (1987)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 8 (1987), S. 44-54 
    Details
    ISSN: 0886-1544
    Keywords: monoclonal antibody ; phosphoproteins ; basal bodies ; morphogenesis ; Paramecium ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The presence of phosphorylated proteins associated with microtubule organizing centers in tissue culture cells during mitosis has been demonstrated by the use of monoclonal antibodies raised against mitotic HeLa cells [Vandre et al., Proc. Natl. Acad. Sci. U.S.A. 81:4439-4443, 1984]. We report here that in Paramecium two of the mitosis specific antibodies, MPM-1 and MPM-2, decorate throughtout the cell cycle all the microtubule organizing centers (MTOCs) located in the cortex and in the oral apparatus (gullet). Immuno-electron microscopy showed that these antibodies labeled the electron-dense material surrounding basal bodies from which several microtubule networks as well as kinetodesmal fibers originate. During mitosis, these antibodies also stained other cortical cytoskeletal structures, the kinetodesmal fibers (MPM-1 and MPM-2) and the epiplasm (MPM-1). Among the different polypeptides recognized by the antibodies on immunoblots, three major ones of 60, 63, and 116 kDa were found to be common to the cortex (where several thousand ciliary basal bodies are anchored) and the oral apparatus (which comprises several hundred basal bodies around which various arrays of cytoplasmic microtubules are organized). Alkaline phosphatase treatment abolished the immunoreactivity of the polypeptides and the labeling observed by immunofluorescence. These results demonstrate that phosphorylated proteins are associated with all the known active microtubule organizing centers present in the cortex throughout the cell cycle of Paramecium. Furthermore they indicate that in Paramecium phosphorylation of proteins could also be involved in the cell cycle dependent dynamics of cortical cytoskeletal structures other than microtubules.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cm.970080107
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  • 5
    Electronic Resource
    Electronic Resource
    Distribution of phosphorylated spindle-associated proteins in the diatom Stephanopyxis turris (1989)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 12 (1989), S. 33-41 
    Details
    ISSN: 0886-1544
    Keywords: phosphorylation ; MPM-2 ; mitotic spindle ; microtubule-associated protein ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Mitotic spindles isolated from the diatom Stephanopyxis turris become thiophosphorylated in the presence of ATPγS at specific locations within the mitotic apparatus, resulting in a stimulation of ATP-dependent spindle elongation in vitro. Here, using indirect immunofluorescence, we compare the staining pattern of an antibody against thiophosphorylated proteins to that of MPM-2, an antibody against mitosis-specific phosphoproteins, in isolated spindles. Both antibodies label spindle poles, kinetochores, and the midzone. Neither antibody exhibits reduced labeling in salt-extracted spindles, although prior salt extraction inhibits thiophosphorylation in ATPγS. Furthermore, both antibodies recognize a 205 kd band on immunoblots of spindle extracts. Microtubule-organizing centers and mitotic spindles label brightly with the MPM-2 antibody in intact cells. These results show that functional mitotic spindles isolated from S. turris are phosphorylated both in vivo and in vitro. We discuss the possible role of phosphorylated cytoskeletal proteins in the control of mitotic spindle function.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cm.970120105
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  • 6
    Electronic Resource
    Electronic Resource
    Epitope mapping of monoclonal antibodies against caldesmon and their effects on the binding of caldesmon to Ca++/calmodulin and to actin or actin-tropomyosin filaments (1991)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 20 (1991), S. 95-108 
    Details
    ISSN: 0886-1544
    Keywords: actomyosin ; smooth muscle contraction ; nonmuscle cell motility ; microinjection ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The effects of monoclonal anti-caldesmon antibodies, C2, C9, C18, C21, and C23, on the binding of caldesmon to F-actin/F-actin-tropomyosin filaments and to Ca++/calmodulin were examined in an in vitro reconstitution system. In addition, the antibody epitopes were mapped by Western blot analysis of NTCB (2-nitro-5-thiocyanobenzoic acid) and CNBr (cyanogen bromide) fragments of caldesmon. Both C9 and C18 recognize an amino terminal fragment composed of amino acid residues 19 to 153. The C23 epitope lies within a fragment ranging from residues 230 to 386. Included in this region is a 13-residue repeat sequence. Interestingly this repetitive sequence shares sequence similarity with a sequence found in nuclear lamin A, a protein which is also recognized by C23 antibody. Therefore, it is likely that the C23 epitope corresponds to this 13-residue repeat sequence. A carboxyl-terminal 10K fragment contains the epitopes for antibodies C2 and C21. Among these antibodies, only C21 drastically inhibits the binding of caldesmon to F-actin/F-actin-tropomyosin filaments and tc Ca++/calmodulin. When the molar ratio of monoclonal antibody C21 to caldesmon reached 1.0, a maximal inhibition (90%) on the binding of caldesmon to F-actin filaments was observed. However, it required double amounts of C21 antibody to exhibit a maximal inhibition of 70% on the binding of caldesmon to F-actin-tropomyosin filaments. These results suggest that the presence of tropomyosin in F-actin enhances caldesmon's binding. Furthermore, C21 antibody also effectively inhibits the caldesmon binding to Ca++/calmodolin. The kinetics of C21 inhibition on caldesmon's binding to Ca++/calmodulin is very similar to the inhibition obtained by preincubation of caldesmon with free Ca++/calmodulin. This result suggests that there is only one Ca++/calmodulin binding domain on caldesmon and this domain appears to be very close to the C21 epitope. Apparently, the Ca++/calmodulin-binding domain and the actin-binding domain are very close to each other and may interfere with each other. In an accompanying paper, we have further demonstrated that microinjection of C21 antibody into living chicken embryo fibroblasts inhibit intracellular granule movement, suggesting an in vivo interference with the functional domains [Hegmann et al., 1991: Cell Motil. Cytoskeleton 20:109-120].
    Additional Material: 11 Ill.
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    URL: http://dx.doi.org/10.1002/cm.970200203
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    Spectrin and ankyrin in brain (1983)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 3 (1983), S. 623-633 
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    ISSN: 0886-1544
    Keywords: spectrin ; ankyrin ; brain membranes ; spectrin subunits ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Further similarity between mammalian erythrocyte spectrin and pig brain spectrin has been demonstrated by (a) formation of hybrid molecules with brain α-chains and erythrocyte β-chains and by (b) identification of an ankyrin protein in brain membranes. Hybrid spectrin molecules prepared from brain α-chains and erythrocyte β-chains were visualized by low-angle rotary shadowing as double-stranded rods (dimers) 100 nM in length. 125I-labeled brain α-chain that was hybridized with erythrocyte β-subunit acquired ability to bind to ankyrin sites on erythrocyte membranes. 125I-labeled brain α-chain bound only to β-subunits of erythrocyte and brain spectrin following transfer of these polypeptides to nitrocellulose paper from sodium dodecyl sulfate (SDS) gels. Thus brain spectrin and mammalian erythrocyte spectrin have shared functional sites involved in association of their subunits. Additional evidence for similarity of brain and erythrocyte membranes is the finding of a 210,000 Mr membrane protein in brain that cross-reacts with erythrocyte ankyrin and has a water-soluble domain of 72,000 Mr that is produced by protease digestion. The 72,000 Mr domain of brain ankyrin has been isolated by affinity chromatography on erythrocyte spectrin-Sepharose, and was demonstrated to bind directly to erythrocyte and brain spectrin. The brain 72,000 Mr fragment has distinct peptide maps from the erythrocyte 72,000 Mr ankyrin fragment and thus is not a result of erythrocyte contamination.
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    URL: http://dx.doi.org/10.1002/cm.970030527
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  • 8
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    β-Tubulin mutation suppresses microtubule dynamics in vitro and slows mitosis in vivo (1995)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 30 (1995), S. 285-300 
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    ISSN: 0886-1544
    Keywords: microtubule dynamics ; β-tubulin ; mitosis ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Microtubule (MT) dynamics vary both spatially and temporally within cells and are thought to be important for proper MT cellular function. Because MT dynamics appear to be closely tied to the guanosine triphosphatase (GTPase) activity of β-tubulin subunits, we examined the importance of MT dynamics in the budding yeast S. cerevisiae by introducing a T107K point mutation into a region of the single β-tubulin gene, TUB2, known to affect the assembly-dependent GTPase activity of MTs in vitro. Analysis of MT dynamic behavior by video-enhanced differential interference contrast microscopy, revealed that T107K subunits slowed both the growth rates and catastrophic disassembly rates of individual MTs in vitro. In haploid cells tub2-T107K is lethal; but in tub2-T107K/tub2-590 heterozygotes the mutation is viable, dominant, and slows cell-cycle progression through mitosis, without causing wholesale disruption of cellular MTs. The correlation between the slower growing and shortening rates of MTs in vitro, and the slower mitosis in vivo suggests that MT dynamics are important in budding yeast and may regulate the rate of nuclear movement and segregation. The slower mitosis in mutant celis did not result in premature cytokinesis and cell death, further suggesting that cell-cycle control mechanisms “sense” the mitotic slowdown, possibly by monitoring MT dynamics directly. © 1995 Wiley-Liss, Inc.
    Additional Material: 5 Ill.
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    URL: http://dx.doi.org/10.1002/cm.970300406
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  • 9
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    Regulation of endothelial cell gap formation and barrier dysfunction: Role of myosin light chain phosphorylation (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 163 (1995), S. 510-522 
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    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Endothelial cell (EC) contraction results in intercellular gap formation and loss of the selective vascular barrier to circulating macromolecules. We tested the hypothesis that phosphorylation of regulatory myosin light chains (MLC) by Ca2+/calmodulin-dependent myosin light chain kinase (MLCK) is critical to EC barrier dysfunction elicited by thrombin. Thrombin stimulated a rapid (〈15 sec) increase in [Ca2+]i which preceded maximal MLC phosphorylation (60 sec) with a 6 to 8-fold increase above constitutive levels of phosphorylated MLC. Dramatic cellular shape changes indicative of contraction and gap formation were observed at 5 min with maximal increases in albumin permeability occurring by 10 min. Neither the Ca2+ ionophore, A23187, nor phorbol myristate acetate (PMA), a direct activator of protein kinase C (PKC), alone or in combination, produced MLC phosphorylation. The combination was synergistic, however, in stimulating EC contraction/gap formation and barrier dysfunction (3 to 4-fold increase). Down-regulation or inhibition of PKC activity attenuated thrombin-induced MLC phosphorylation (∼40% inhibition) and both thrombin- and PMA-induced albumin clearance (∼50% inhibition). Agents which augmented [cAMP]i partially blocked thrombin-induced MLC phosphorylation (∼50%) and completely inhibited both thrombin- and PMA-induced EC permeability (100% inhibition). Furthermore, cAMP produced significant reduction in the basal levels of constitutive MLC phosphorylation. Finally, MLCK inhibition (with either ML-7 or KT 5926) or Ca2+/calmodulin antagonism (with either trifluoperazine or W-7) attenuated thrombin-induced MLC phosphorylation and barrier dysfunction. These results suggest a model wherein EC contractile events, gap formation and barrier dysfunction occur via MLCK-dependent and independent mechanisms and are significantly modulated by both PKC and cAMP-dependent protein kinase A activities. © 1995 Wiley-Liss, Inc.
    Additional Material: 7 Ill.
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    URL: http://dx.doi.org/10.1002/jcp.1041630311
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  • 10
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    Electronic Resource
    Transferrin is made and bound by photoreceptor cells (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 156 (1993), S. 280-285 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Retinal pigment epithelial cells, which form one aspect of the blood-retinal barrier, control the access of blood-borne components such as diferric transferrin to the neural retina. It has recently been shown that RPE cells remove iron from diferric transferrin in a low pH compartment and subsequently release it in a low molecular weight form that can be chelated by apo-transferrin (Hunt and Davis: J. Cell Physiol. 152:102-110, 1992). It is now shown that photoreceptor cells can bind diferric transferrin to receptors on their inner segments. Moreover, polymerase chain reaction and in situ hybridization show that cells of the neural retina, particularly photoreceptors, make apo-transferrin. © 1993 Wiley-Liss, Inc.
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    URL: http://dx.doi.org/10.1002/jcp.1041560209
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