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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 259 (1998), S. 123-129 
    ISSN: 1617-4623
    Keywords: Key words RNA polymerase assembly ; Protein-protein contact ; Functional site mapping ; Yeast two-hybrid screening
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract [Rpb1 and Rpb2] Mapping of the contact sites␣on two large subunits of the fission yeast Schizosaccharomyces pombe RNA polymerase II with two small subunits, Rpb3 and Rpb5, was carried out using the two-hybrid screening system in the budding yeast Saccharomyces cerevisiae. Rpb5 was found to interact with any fragment of Rpb1 that contained the region H, which is conserved among the subunit 1 homologues of all RNA polymerases, including the β' subunit of prokaryotic RNA polymerases. In agreement with the fact that Rpb5 is shared among all three forms of eukaryotic RNA polymerases, the region H of RNA polymerase I subunit 1 (Rpa190) was also found to interact with Rpb5. On the other hand, two-hybrid screening of Rpb2 fragments from RNA polymerase II indicated the presence of an Rpb3 contact site in the region H which is conserved among the subunit 2 homologues of all RNA polymerases, including the β subunit of prokaryotic RNA polymerases. Possible functions of the regions H in the subunits 1 and 2 are discussed.
    Type of Medium: Electronic Resource
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