RNase P RNA-mediated catalysis

2002 ◽  
Vol 30 (6) ◽  
pp. 1153-1158 ◽  
Author(s):  
L. A. Kirsebom
Keyword(s):  
Catalytic Activity ◽  
Metal Ions ◽  
Specific Interaction ◽  
Rnase P ◽  
Substrate Complex ◽  
Mediated Catalysis

The endoribonuclease RNase P is involved in the processing of tRNA precursors to generate mature 5′ termini. The catalytic activity of RNase P is associated with an RNA, RNase P RNA. A specific interaction between the 3′ end of the substrate and RNase P RNA, to form an RNase P RNA-substrate complex, is referred to as the ‘73–294-interaction’. This interaction has an important role for efficient and correct cleavage to occur. Here our understanding of the contribution of the 73–294-interaction and metal ions, with respect to efficient and correct cleavage in RNase P RNA-mediated catalysis, will be discussed.

The effect of partial exchange of sulphonated macroporous styrene-divinylbenzene copolymers for different ions on their catalytic activity

1981 ◽  
Vol 46 (10) ◽  
pp. 2354-2363 ◽  
Author(s):  
Svatomír Kmošták ◽  
Karel Setínek
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Metal Ions ◽  
Gas Phase ◽  
Transition Metal Ions ◽  
Exchange Capacity ◽  
Total Exchange Capacity ◽  
Styrene Divinylbenzene ◽  
Na Ions ◽  
Type Of Transition

The catalytic activity of sulphonated macroporous styrene-divinylbenzene copolymers, the exchange capacity of which was neutralized from 30, 50 and 80% by Fe(III) ions and from 30% by Na ions and that of Wofatit Y-37 ion exchanger neutralized from 10% of its total exchange capacity by several transition metal ions and by sodium has been studied in isomerisation of cyclohexene and dehydration of 1-propanol in the gas phase at 130 °C. It was demonstrated that in both reactions transition metal ions exhibit additional effect to the expected neutralization of the polymer acid groups. In the case of cyclohexene isomerization, this effect depends on the degree of crosslinking of polymer mass of the catalyst. Such dependence has not been, however, observed in dehydration of 1-propanol. The type of transition metal ions did not exhibit any significant effect on the catalytic activity of the polymer catalysts studied.

Role of Metal Ions In The Cleavage Mechanism by The E. Coli Rnase P Holoenzyme

1997 ◽  
Vol 16 (5-6) ◽  
pp. 721-725 ◽  
Author(s):  
Jens M. Warneckes ◽  
Christopher J. Green ◽  
Roland K. Hartmann
Keyword(s):  
Metal Ions ◽  
Rnase P ◽  
E Coli

New cobalt(ii) coordination designs and the influence of varying chelate characters, ligand charges and incorporated group I metal ions on enzyme-like oxidative coupling activity

2020 ◽  
Vol 44 (35) ◽  
pp. 14849-14858
Author(s):  
Hammed Olawale Oloyede ◽  
Joseph Anthony Orighomisan Woods ◽  
Helmar Görls ◽  
Winfried Plass ◽  
Abiodun Omokehinde Eseola
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Active Site ◽  
Oxidative Coupling ◽  
Reaction Conditions ◽  
Group I ◽  
Mediated Catalysis

In transition-metal-mediated catalysis, design of new, well defined coordination architectures and subjecting them to catalysis testing under the same reaction conditions is a necessity tool for improved understanding of desirable active site geometries and characteristics.

Efficient Catalytic Activity of Transition Metal Ions in Vilsmeier-Haack Reactions with Acetophenones

2013 ◽  
Vol 45 (11) ◽  
pp. 721-733 ◽  
Author(s):  
F. Aneesa ◽  
K. C. Rajanna ◽  
M. Venkateswarlu ◽  
K. Rajendar Reddy ◽  
Y. Arun Kumar
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions
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