1a60

NMR STRUCTURE OF A CLASSICAL PSEUDOKNOT: INTERPLAY OF SINGLE-AND DOUBLE-STRANDED RNA, 24 STRUCTURES

spinqualitylabelsall models 1a60, 24 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1a60 is a 1 chain structure with sequence from Turnip yellow mosaic virus. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Pseudoknot formation folds the 3' ends of many plant viral genomic RNAs into structures that resemble transfer RNA in global folding and in their reactivity to transfer RNA-specific proteins. The solution structure of the pseudoknotted T arm and acceptor arm of the transfer RNA-like structure of turnip yellow mosaic virus (TYMV) was determined by nuclear magnetic resonance (NMR) spectroscopy. The molecule is stabilized by the hairpin formed by the 5' end of the RNA, and by the intricate interactions related to the loops of the pseudoknot. Loop 1 spans the major groove of the helix with only two of its four nucleotides. Loop 2, which crosses the minor groove, interacts closely with its opposing helix, in particular through hydrogen bonds with a highly conserved adenine. The structure resulting from this interaction between the minor groove and single-stranded RNA at helical junctions displays internal mobility, which may be a general feature of RNA pseudoknots that regulates their interaction with proteins or other RNA molecules. NMR structure of a classical pseudoknot: interplay of single- and double-stranded RNA.,Kolk MH, van der Graaf M, Wijmenga SS, Pleij CW, Heus HA, Hilbers CW Science. 1998 Apr 17;280(5362):434-8. PMID:9545221 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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