Structural highlights
Function[RL25_ECOLI] This is one of the proteins that binds to the 5S RNA in the ribosome where it forms part of the central protuberance. Binds to the 5S rRNA independently of L5 and L18. Not required for binding of the 5S rRNA/L5/L18 subcomplex to 23S rRNA.[HAMAP-Rule:MF_01336] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe crystal structure of Escherichia coli ribosomal protein L25 bound to an 18-base pair portion of 5S ribosomal RNA, which contains "loop E," has been determined at 1.8-A resolution. The protein primarily recognizes a unique RNA shape, although five side chains make direct or water-mediated interactions with bases. Three beta-strands lie in the widened minor groove of loop E formed by noncanonical base pairs and cross-strand purine stacks, and an alpha-helix interacts in an adjacent widened major groove. The structure of loop E is largely the same as that of uncomplexed RNA (rms deviation of 0.4 A for 11 base pairs), and 3 Mg(2+) ions that stabilize the noncanonical base pairs lie in the same or similar locations in both structures. Perhaps surprisingly, those residues interacting with the RNA backbone are the most conserved among known L25 sequences, whereas those interacting with the bases are not. Structure of Escherichia coli ribosomal protein L25 complexed with a 5S rRNA fragment at 1.8-A resolution.,Lu M, Steitz TA Proc Natl Acad Sci U S A. 2000 Feb 29;97(5):2023-8. PMID:10696113[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences | ||||||||||||||||||
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