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  • Title: Mapping contacts of the S12-S7 intercistronic region of str operon mRNA with ribosomal protein S7 of E. coli.
    Author: Golovin A, Spiridonova V, Kopylov A.
    Journal: FEBS Lett; 2006 Oct 30; 580(25):5858-62. PubMed ID: 17027976.
    Abstract:
    In E. coli, S7 initiates 30S ribosome assembly by binding to 16S rRNA. It also regulates translation of the S12 and S7 cistrons of the 'streptomycin' operon transcript by binding to the S12-S7 intercistronic region. Here, we describe the contacts of N-terminally His(6)-tagged S7 with this region as mapped by UV-induced cross-linking. The cross-links are located at U(-34), U(-35), quite distant from the start codons of the two cistrons. In order to explain the mechanism of translational repression of S12-S7, we consider a possible conformational rearrangement of the intercistronic RNA structure induced by S7 binding.
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