1aci
From Proteopedia
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L11 RIBOSOMAL PROTEIN RNA BINDING DOMAIN, NMR, 20 STRUCTURES
Overview
Ribosomal protein L11 interacts with a 58-nucleotide domain of large, subunit ribosomal RNA; both the protein and its RNA target have been, highly conserved. The antibiotic thiostrepton recognizes the same RNA, domain, and binds to the ribosome cooperatively with L11. Experiments, presented here show that RNA recognition and thiostrepton cooperativity, can be attributed to C- and N-terminal domains of L11, respectively. Under, trypsin digestion conditions that degrade Bacillus stearothermophilus L11, to small fragments, the target RNA protects the C-terminal 77 residues, from digestion, and thiostrepton and RNA in combination protect the entire, protein. A 76-residue C-terminal fragment of L11 was overexpressed and, shown to fold into a stable structure binding ribosomal RNA with, essentially the same properties as full-length L11. An, L11.thiostrepton.RNA complex was 100-200-fold more stable than expected on, the basis of L11-RNA and thiostrepton-RNA binding affinities; similar, measurements with the C-terminal fragment detected no cooperativity with, thiostrepton. L11 function is thus more complex than simple interaction, with ribosomal RNA; we suggest that thiostrepton mimics some ribosomal, component or factor that normally interacts with the L11 N-terminal, domain.
About this Structure
1ACI is a Single protein structure of sequence from Geobacillus stearothermophilus. Full crystallographic information is available from OCA.
Reference
Cooperative interactions of RNA and thiostrepton antibiotic with two domains of ribosomal protein L11., Xing Y, Draper DE, Biochemistry. 1996 Feb 6;35(5):1581-8. PMID:8634289
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