Nucleic Acids Research, Vol 24, Issue 8 1497-1503, Copyright © 1996 by Oxford University Press
CJ Green, R Rivera-Leon and BS Vold
A deletion mutant of the catalytic RNA component of Escherichia coli RNase
P missing residues 87-241 retains the ability to interact with the protein
component to form a functional catalyst. The deletion of this
phylogenetically conserved region significantly increases the Km,
indicating that the deleted structures may be important for binding to the
precursor tRNA substrate but not for the cleavage reaction. Under some
reaction conditions, this RNase P deletion mutant can become a relatively
non-specific nuclease, indicating that this RNA's catalytic center may be
more exposed. The catalytic core of the RNase P is formed by less than one
third of the 377 residues of the RNase P RNA.
ARTICLES
The catalytic core of RNase P
SRI International, Menlo Park, CA 94025-3493, USA.
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