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'Membrane Proteins' in keywords Facet   Publication Year 1985  [X]
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1Author    M. H. Ecker, A.-M Dünger, G. Wachlin, F. MachRequires cookie*
 Title    Untersuchungen über die Regulation der Proteinsynthese auswachsender Sporen von Bacillus subtilis Studies on Protein Synthesis of Outgrowing Spores of Bacillus subtilis  
 Abstract    Two-dimensional gel electrophoresis according to O'Farrell [6] was used to study synthesis of membrane bound proteins during outgrowth of Bacillus subtilis spores. Three major classes of membrane bound proteins were distinguished, depending on the time of onset and duration of their synthesis: la — a great amount of proteins typical of vegetative cells made throughout all stages of outgrowth and vegetative growth; lb — vegetative proteins synthesized during middle and later outgrowth stages as well as during vegetative growth (sequential activation); II — outgrowth-specific proteins synthesized during early outgrowth but not in vegetative cells. A similar classification was made for total proteins [9]. In a temperature-sensitive mutant defective in early outgrowth the sequential activation of vegetative genes (group lb) is especially inhibited under restrictive conditions, whereas the syn­ thesis of group Ia-proteins and outgrowth-specific proteins (II) could be detected during early outgrowth stages. We suggest that the expression of outgrowth genes, whose products might be found among the outgrowth-specific proteins, could be involved in the sequential reactivation of vegetative genes during outgrowth. The vegetative proteins of group la (continuous synthesis) are produced throughout growth and differentiation. On the other hand the synthesis of vegetative proteins, group lb , is switched off during sporulation and switched on during outgrowth. The control mechanisms of the expression of these two groups of vegetative genes during growth and differen­ tiation are discussed. 
  Reference    Z. Naturforsch. 40c, 421 (1985); eingegangen am 25. Oktober 1984/21. Februar 1985 
  Published    1985 
  Keywords    Bacillus subtilis, Spore Outgrowth, Protein Synthesis, Membrane Proteins 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0421.pdf 
 Identifier    ZNC-1985-40c-0421 
 Volume    40 
2Author    Hans-Joachim Soli, Ellen OlschewskiRequires cookie*
 Title    Photoaffinity Labeling o f Spinach Thylakoids and Cytochrome ^  
 Abstract    /-C o m p le x by the Hydrophobic Reagent 3-(Trifluorom ethyl)-3-(/n-[125I]iodophenyl)-diazirine W alter O ettm eier, In isolated spinach thylakoids the hydrophobic photo­ reactive probe 3-(trifluoromethyl)-3-(m-[I25I]iodophenyl-diazirine almost exclusively labels the photosystem I reac­ tion center and the light-harvesting chlorophyll alb protein. In isolated cytochrome b6//-complex, all four components of the complex get labeled, but to a different extent. The amount of labeling in the protein components is correlated to the number of polypeptide segments embedded in the membrane system. 
  Reference    Z. Naturforsch. 40c, 454 (1985); received February 25 1985 
  Published    1985 
  Keywords    Photoaffinity Label, Carbene Reagent, Spinach Thylakoids, Cytochrome b j f -complex, Membrane Proteins 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0454_n.pdf 
 Identifier    ZNC-1985-40c-0454_n 
 Volume    40