1g70 | pdb_00001g70

COMPLEX OF HIV-1 RRE-IIB RNA WITH RSG-1.2 PEPTIDE

spinqualitylabelsall models 1g70 Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1g70 is a 2 chain structure with sequence from Human immunodeficiency virus 1. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed We have used NMR spectroscopy to determine the solution structure of a complex between an oligonucleotide derived from stem IIB of the Rev responsive element (RRE-IIB) of HIV-1 mRNA and an in vivo selected, high affinity binding Arg-rich peptide. The peptide binds in a partially alpha-helical conformation into a pocket within the RNA deep groove. Comparison with the structure of a complex between an alpha-helical Rev peptide and RRE-IIB reveals that the sequence of the bound peptide determines the local conformation of the RRE peptide binding site. A conformational switch of an unpaired uridine base was revealed; this points out into the solvent in the Rev peptide complex, but it is stabilized inside the RNA deep groove by stacking with an Arg side chain in the selected peptide complex. The conformational switch has been visualized by NMR chemical shift mapping of the uridine H5/H6 atoms during a competition experiment in which Rev peptide was displaced from RRE-IIB by the higher affinity binding selected peptide. Peptide-triggered conformational switch in HIV-1 RRE RNA complexes.,Gosser Y, Hermann T, Majumdar A, Hu W, Frederick R, Jiang F, Xu W, Patel DJ Nat Struct Biol. 2001 Feb;8(2):146-50. PMID:11175904 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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