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M9650261.TXT
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1996-03-09
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Document 0261
DOCN M9650261
TI Assignment and modeling of the Rev Response Element RNA bound to a Rev
peptide using 13C-heteronuclear NMR.
DT 9605
AU Battiste JL; Tan R; Frankel AD; Williamson JR; Department of Chemistry,
Massachusetts Institute of Technology,; Cambridge 02139, USA.
SO J Biomol NMR. 1995 Dec;6(4):375-89. Unique Identifier : AIDSLINE
MED/96141450
AB The Rev Response Element (RRE) RNA-Rev protein interaction is important
for regulation of gene expression in the human immunodeficiency virus. A
model system for this interaction, which includes stem IIB of the RRE
RNA and an arginine-rich peptide from the RNA-binding domain of Rev, was
studied using multidimensional heteronuclear NMR. Assignment of the RNA
when bound to the peptide was obtained from NMR experiments utilizing
uniformly and specifically 13C-labeled RNA. Isotopic filtering
experiments on the specifically labeled RNA enable unambiguous
assignment of unusual nonsequential NOE patterns present in the internal
loop of the RRE. A three-dimensional model of the RNA in the complex was
obtained using restrained molecular dynamics calculations. The internal
loop contains two purine-purine base pairs, which are stacked to form
one continuous helix flanked by two A-form regions. The formation of a
G-G base pair in the internal loop requires an unusual structure of the
phosphate backbone. This structural feature is consistent with
mutational data as being important for the binding of Rev to the RRE.
The G-G base pair may play an important role in opening the normally
narrow major groove of A-form RNA to permit binding of the Rev basic
domain.
DE Gene Products, rev/GENETICS/*METABOLISM Genes, env/*GENETICS Human
HIV/*GENETICS Models, Molecular Nuclear Magnetic Resonance Nucleic
Acid Conformation Protein Binding Protein Conformation RNA,
Viral/*GENETICS/METABOLISM Support, Non-U.S. Gov't Support, U.S.
Gov't, P.H.S. JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).