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Secondary structure in solution of two anti-HIV-1 hammerhead ribozymes as investigated by two-dimensional 1H 500 MHz NMR spectroscopy in waterTwo hammerhead chimeric RNA/DNA ribozymes (HRz) were synthesized in pure form. Both were 30 nucleotides long, and the sequences were such that they could be targeted to cleave the HIV-1 gag RNA. Named HRz-W and HRz-M, the former had its invariable core region conserved, the latter had a uridine in the invariable region replaced by a guanine. Their secodary structures were determined by 2D NOESY 1H 500 MHz NMR spectroscopy in 90% water and 10% D2(0), following the imino protons. The data show that both HRz-M and HRz-W form identical secondary structures with stem regions consisting of continuous stacks of AT and GT pairs. An energy minimized computer model of this stem region is provided. The results suggest that the loss of catalytic activity that is known to result when an invariant core residue is replaced is not related to the secondary structure of the ribozymes in the absence of substrate.
Document ID
20050000244
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sarma, R. H.
(Institute of Biomolecular Stereodynamics, State University of New York at Albany 12222)
Sarma, M. H.
Rein, R.
Shibata, M.
Setlik, R. S.
Ornstein, R. L.
Kazim, A. L.
Cairo, A.
Tomasi, T. B.
Date Acquired
August 22, 2013
Publication Date
January 9, 1995
Publication Information
Publication: FEBS letters
Volume: 357
Issue: 3
ISSN: 0014-5793
Subject Category
Exobiology
Funding Number(s)
CONTRACT_GRANT: RR00995
CONTRACT_GRANT: GM 29789
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Exobiology

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