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  • Artikel  (226)
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  • Artikel  (226)
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  • 1
    Digitale Medien
    Digitale Medien
    THE ACTION OF MOLECULAR CHAPERONES IN THE EARLY SECRETORY PATHWAY (2001)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Genetics 35 (2001), S. 149-191 
    Details
    ISSN: 0066-4197
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Biologie
    Notizen: Abstract The endoplasmic reticulum (ER) serves as a way-station during the biogenesis of nearly all secreted proteins, and associated with or housed within the ER are factors required to catalyze their import into the ER and facilitate their folding. To ensure that only properly folded proteins are secreted and to temper the effects of cellular stress, the ER can target aberrant proteins for degradation and/or adapt to the accumulation of misfolded proteins. Molecular chaperones play critical roles in each of these phenomena.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.genet.35.102401.090313
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    EMERGING PRINCIPLES OF CONFORMATION-BASED PRION INHERITANCE (2004)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Biochemistry 73 (2004), S. 617-656 
    Details
    ISSN: 0066-4154
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Chemie und Pharmazie , Biologie
    Notizen: The prion hypothesis proposes that proteins can act as infectious agents. Originally formulated to explain transmissible spongiform encephalopathies (TSEs), the prion hypothesis has been extended with the finding that several non-Mendelian traits in fungi are due to heritable changes in protein conformation, which may in some cases be beneficial. Although much remains to be learned about the specific role of cellular cofactors, mechanistic parallels between the mammalian and yeast prion phenomena point to universal features of conformation-based infection and inheritance involving propagation of ordered beta-sheet-rich protein aggregates commonly referred to as amyloid. Here we focus on two such features and discuss recent efforts to explain them in terms of the physical properties of amyloid-like aggregates. The first is prion strains, wherein chemically identical infectious particles cause distinct phenotypes. The second is barriers that often prohibit prion transmission between different species. There is increasing evidence suggesting that both of these can be manifestations of the same phenomenon: the ability of a protein to misfold into multiple self-propagating conformations. Even single mutations can change the spectrum of favored misfolded conformations. In turn, changes in amyloid conformation can shift the specificity of propagation and alter strain phenotypes. This model helps explain many common and otherwise puzzling features of prion inheritance as well as aspects of noninfectious diseases involving toxic misfolded proteins.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.biochem.72.121801.161837
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    EMERGING PRINCIPLES OF CONFORMATION-BASED PRION INHERITANCE (2004)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Biochemistry 73 (2004), S. 617-656 
    Details
    ISSN: 0066-4154
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Chemie und Pharmazie , Biologie
    Notizen: The prion hypothesis proposes that proteins can act as infectious agents. Originally formulated to explain transmissible spongiform encephalopathies (TSEs), the prion hypothesis has been extended with the finding that several non-Mendelian traits in fungi are due to heritable changes in protein conformation, which may in some cases be beneficial. Although much remains to be learned about the specific role of cellular cofactors, mechanistic parallels between the mammalian and yeast prion phenomena point to universal features of conformation-based infection and inheritance involving propagation of ordered beta-sheet-rich protein aggregates commonly referred to as amyloid. Here we focus on two such features and discuss recent efforts to explain them in terms of the physical properties of amyloid-like aggregates. The first is prion strains, wherein chemically identical infectious particles cause distinct phenotypes. The second is barriers that often prohibit prion transmission between different species. There is increasing evidence suggesting that both of these can be manifestations of the same phenomenon: the ability of a protein to misfold into multiple self-propagating conformations. Even single mutations can change the spectrum of favored misfolded conformations. In turn, changes in amyloid conformation can shift the specificity of propagation and alter strain phenotypes. This model helps explain many common and otherwise puzzling features of prion inheritance as well as aspects of noninfectious diseases involving toxic misfolded proteins.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.biochem.72.121801.161837
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    The structural basis of yeast prion strain variants (2007)
    [s.l.] : Nature Publishing Group
    Nature 449 (2007), S. 233-237 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Among the many surprises to arise from studies of prion biology, perhaps the most unexpected is the strain phenomenon whereby a single protein can misfold into structurally distinct, infectious states that cause distinguishable phenotypes. Similarly, proteins can adopt a spectrum of ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature06108
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Systems Biology Many things from one (2006)
    [s.l.] : Nature Publishing Group
    Nature 444 (2006), S. 561-562 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The census bureau will tell you that the typical American family has 2.1 children, but there are no families (we hope) that precisely match this mean. Similarly, biologists have come to realize that population-based measurements can obscure critical information about cell-to-cell diversity. The use ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature05407
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    The physical basis of how prion conformations determine strain phenotypes (2006)
    [s.l.] : Nature Publishing Group
    Nature 442 (2006), S. 585-589 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] A principle that has emerged from studies of protein aggregation is that proteins typically can misfold into a range of different aggregated forms. Moreover, the phenotypic and pathological consequences of protein aggregation depend critically on the specific misfolded form. A striking example ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature04922
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Conformational variations in an infectious protein determine prion strain differences (2004)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 428 (2004), S. 323-328 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] A remarkable feature of prion biology is the strain phenomenon wherein prion particles apparently composed of the same protein lead to phenotypically distinct transmissible states. To reconcile the existence of strains with the ‘protein-only’ hypothesis of prion transmission, it has ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature02392
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Global analysis of protein localization in budding yeast (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 425 (2003), S. 686-691 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] A fundamental goal of cell biology is to define the functions of proteins in the context of compartments that organize them in the cellular environment. Here we describe the construction and analysis of a collection of yeast strains expressing full-length, chromosomally tagged green fluorescent ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature02026
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Generation of prion transmission barriers by mutational control of amyloid conformations (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 424 (2003), S. 948-951 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Self-propagating β-sheet-rich protein aggregates are implicated in a wide range of protein-misfolding phenomena, including amyloid diseases and prion-based inheritance. Two properties have emerged as common features of amyloids. Amyloid formation is ubiquitous: many unrelated proteins form ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature01894
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Release of both native and non-native proteins from a cis -only GroEL ternary complex (1996)
    [s.l.] : Nature Publishing Group
    Nature 383 (1996), S. 96-99 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] To produce a 'as-only' GroEL complex, which is able to bind polypeptide and GroES on only one and the same ring, we formed a mixed-ring GroEL complex, in which one ring was composed of wild-type subunits and the other of subunits with apical domain substitutions that prevent both polypeptide and ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/383096a0
    Standort Signatur Erwartet Verfügbarkeit
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