ISSN:
1573-4978
Schlagwort(e):
ribonuclease
;
ribozyme
;
RNase P RNA
;
RNA structure
;
tRNA
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract The ubiquitous occurrence of ribonuclease P (RNase P) as a ribonucleoprotein and the catalytic properties of bacterial RNase P RNAs indicate that RNA fulfills an ancient and important role in the function of this enzyme. This review focuses on efforts to determine the structure of the bacterial RNase P RNA ribozyme. Phylogenetic comparative analysis of a library of bacterial RNase P RNA sequences has resulted in a well-developed secondary structure model and allowed identification of some elements of tertiary structure. The native structure has been redesigned by circular permutation to facilitate intra- and inter-molecular crosslinking experiments in order to gain further structural information. The crosslinking constraints, together with the constraints provided by comparative analyses, have been incorporated into a first-order model of the structure of the ribozyme-substrate complex. The developing structural perspective allows the design of self-cleaving pre-tRNA-RNase P RNA conjugates which are useful tools for additional structure-probing experiments.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00988715
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