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- W2330331334 abstract "Controlled RNA degradation is known to be achieved via the exosome in Eukarya and Archaea, and the RNA degradosome in Bacteria. In this issue of the Biochemical Journal, Taghbalout et al. demonstrate in Escherichia coli that many additional proteins of the RNA degradation and processing network co-localize with the RNA degradosome in supramolecular structures. The latter appear as extended cytoplasmic membrane-associated assemblies that coil around the periphery of the cell when visualized by immunofluorescence microscopy. The co-localizing ensemble of RNA metabolic proteins includes RNaseE, PNPase (polynucleotide phosphorylase), the DEAD-box RNA helicase RhlB, the oligo-RNase Orn, RNases II and III, PAP I [poly(A) polymerase I], RppH (RNA pyrophosphohydrolase), proteins RraA and RraB that are negative regulators of RNaseE, and the RNA chaperone Hfq. Not all cellular RNA-binding proteins associate with these structures, as shown for EF-Tu (elongation factor Tu) and Rho helicase. Formation of the supramolecular architecture was shown to not be dependent on two other known cytoskeletal systems or on RNA de novo synthesis or nucleoid positioning within the cell. This novel dimension of compartmentalization in bacteria that lack classic cell compartments opens new perspectives on how RNA homoeostasis is achieved, organized and regulated in bacteria such as E. coli." @default.
- W2330331334 created "2016-06-24" @default.
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- W2330331334 date "2014-01-20" @default.
- W2330331334 modified "2023-09-23" @default.
- W2330331334 title "Supramolecular membrane-associated assemblies of RNA metabolic proteins in <i>Escherichia coli</i>" @default.
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- W2330331334 doi "https://doi.org/10.1042/bj20131676" @default.
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