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'Dielectric relaxation' in keywords Facet   Publication Year 1999  [X]
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1999[X]
1Author    Adalberto Bonincontro3, Alessio De Francesco3, Gianfranco RisuleobRequires cookie*
 Title    Dielectric Properties of Ribosomal Core Particles Lacking a Select Population of Proteins  
 Abstract    In this communication we present a comparative investigation of the dielectric properties of native E. coli 70S and ribosomal cores obtained by LiCl treatment. Previous data obtained in our laboratory showed that ribosomes exhibit two different dielectric dispersions. We show that elimination of some select proteins modifies only the first one and therefore the overall dielectric properties of the ribosome result altered. Ribosomal RNA and proteins remaining in the core particle are mainly responsible for the second dielectric dispersion. Our experi­ mental approach allows an estimation of the size of RNA traits exposed to solvent both in native ribosomes and in core particles where a higher portion of rRNA interacts with the external environment. Furthermore our results are consistent with the idea that proteins remaining after high salt treatment are necessary and sufficient for the maintenance of the basic structural properties of the ribosome. 
  Reference    Z. Naturforsch. 54c, 569—5 (1999); received March 12/May 3 1999 
  Published    1999 
  Keywords    Ribosomal Cores, Dielectric Relaxation, Ribonucleoprotein Particle, Structure 
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 TEI-XML for    default:Reihe_C/54/ZNC-1999-54c-0569.pdf 
 Identifier    ZNC-1999-54c-0569 
 Volume    54