Abstract
Pb2+‐induced hydrolysis of RNase P RNAs from Escherichia coli and the thermophilic eubacterium Thermus thermophilus HB8 revealed one prominent site‐specific cleavage in the two RNAs and several minor cleavage sites in structurally corresponding regions of both RNAs. Data presented here and in a previous study [Kazakov, S. & Altman, S. (1991) Proc. Natl Acad. Sci. USA 88, 9193–9197] provide evidence for several ubiquitous metal‐ion‐binding sites in eubacterial RNase P RNA subunits. With the T. thermophilus RNase P RNA, susceptibility to Pb2+‐induced strand scission at the most prominent site was hypersensitive at the temperature of highest enzyme activity (55°C). Pb2+ hydrolysis at this site was strongly reduced at a temperature of 37°C, where processing is also inefficient. For E. coli RNase P RNA, specific changes in the lead hydrolysis pattern were observed due to the presence of excess tRNA. Thus, Pb2+‐induced hydrolysis seems suitable to sense different conformations of RNase P RNAs. The T. thermophilus RNase P RNA, in particular, displayed significant processing activity after severe fragmentation by Pb2+, and therefore appears to be suited for reconstituting an active enzyme from RNA subfragments.
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Dates
Type | When |
---|---|
Created | 20 years, 5 months ago (March 4, 2005, 4:49 a.m.) |
Deposited | 1 year, 11 months ago (Aug. 31, 2023, 3:54 a.m.) |
Indexed | 1 year, 2 months ago (June 26, 2024, 8:54 p.m.) |
Issued | 31 years, 7 months ago (Jan. 1, 1994) |
Published | 31 years, 7 months ago (Jan. 1, 1994) |
Published Online | 20 years, 5 months ago (March 3, 2005) |
Published Print | 31 years, 7 months ago (Jan. 1, 1994) |
@article{CIESIOLKA_1994, title={Lead‐ion‐induced cleavage of RNase P RNA}, volume={219}, ISSN={1432-1033}, url={http://dx.doi.org/10.1111/j.1432-1033.1994.tb19913.x}, DOI={10.1111/j.1432-1033.1994.tb19913.x}, number={1–2}, journal={European Journal of Biochemistry}, publisher={Wiley}, author={CIESIOLKA, Jerzy and HARDT, Wolf‐Dietrich and SCHLEGL, Judith and ERDMANN, Volker A. and HARTMANN, Roland K.}, year={1994}, month=jan, pages={49–56} }