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1

Editing of plant mitochondrial transfer RNAs

100%

Fey J., Weil J. H., Tomita K., Cosset A., Dietrich A., Small I., Maréchal-Drouard L.

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2001

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vol. 48

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issue 2

383-389

EN

Editing in plant mitochondria consists in C to U changes and mainly affects messenger RNAs, thus providing the correct genetic information for the biosynthesis of mitochondrial (mt) proteins. But editing can also affect some of the plant mt tRNAs encoded by the mt genome. In dicots, a C to U editing event corrects a C:A mismatch into a U:A base-pair in the acceptor stem of mt tRNAPhe (GAA). In larch mitochondria, three C to U editing events restore U:A base-pairs in the acceptor stem, D stem and anticodon stem, respectively, of mt tRNAHis (GUG). For both these mt tRNAs editing of the precursors is a prerequisite for their processing into mature tRNAs. In potato mt tRNACys (GCA), editing converts a C28:U42 mismatch in the anticodon stem into a U28:U42 non-canonical base-pair, and reverse transcriptase minisequencing has shown that the mature mt tRNACys is fully edited. In the bryophyte Marchantia polymorpha this U residue is encoded in the mt genome and evolutionary studies suggest that restoration of the U28 residue is necessary when it is not encoded in the gene. However, in vitro studies have shown that neither processing of the precursor nor aminoacylation of tRNACys requires C to U editing at this position. But sequencing of the purified mt tRNACys has shown that is present at position 28, indicating that C to U editing is a prerequisite for the subsequent isomerization of U into Ψ at position 28.

2

Structure-function relationships in class CA1 cysteine peptidase propeptides

100%

Wiederanders B.

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2003

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vol. 50

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issue 3

691-713

EN

Regulation of proteolytic enzyme activity is an essential requirement for cells and tissues because proteolysis at a wrong time and location may be lethal. Proteases are synthesized as inactive or less active precursor molecules in order to prevent such inappropriate proteolysis. They are activated by limited intra- or intermolecular proteolysis cleaving off an inhibitory peptide. These regulatory proenzyme regions have attracted much attention during the last decade, since it became obvious that they harbour much more information than just triggering activation. In this review we summarize the structural background of three functions of clan CA1 cysteine peptidase (papain family) proparts, namely the selectivity of their inhibitory potency, the participation in correct intracellular targeting and assistance in folding of the mature enzyme. Today, we know more than 500 cysteine peptidases of this family from the plant and animal kingdoms, e.g. papain and the lysosomal cathepsins L and B. As it will be shown, the propeptide functions are determined by certain structural motifs conserved over millions of years of evolution.

3

Influence of Intensification Factors on Quality of Fe Agglomerates Made with Alternative Fuel

86%

Semanová Z., Legemza J., Hrubovčáková M., Findorák R., Fröhlichová M.

Archives of Metallurgy and Materials

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2018

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vol. 63

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issue 4

4

Development of the diatomite production, reserves and its processing in the Czech Republic in 1999‒2018

86%

Zahradník J., Jirásek J., Zahradník J., Sivek M.

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vol. 35

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issue 2

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2 Acta Biochimica Polonica

1 Archives of Metallurgy and Materials

1 Gospodarka Surowcami Mineralnymi

1 2019

1 2018

1 2003

1 2001

1 Cosset A.

1 Dietrich A.

1 Fey J.

1 Findorák R.

1 Fröhlichová M.

1 Hrubovčáková M.

1 Jirásek J.

1 Legemza J.

1 Maréchal-Drouard L.

1 Semanová Z.

1 Sivek M.

1 Small I.

1 Tomita K.

1 Weil J. H.

1 Wiederanders B.

1 Zahradník J.

Editing of plant mitochondrial transfer RNAs

Structure-function relationships in class CA1 cysteine peptidase propeptides

Influence of Intensification Factors on Quality of Fe Agglomerates Made with Alternative Fuel

Development of the diatomite production, reserves and its processing in the Czech Republic in 1999‒2018