Petr V. Sergiev

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Ribosomes synthesize proteins according to the information encoded in mRNA. During this process, both the incoming amino acid and the nascent peptide are bound to tRNA molecules. Three binding sites for tRNA in the ribosome are known: the A-site for aminoacyl-tRNA, the P-site for peptidyl-tRNA and the E-site for the deacylated tRNA leaving the ribosome.(More)
Regulation of gene expression at the level of translation accounts for up to three orders of magnitude in its efficiency. We systematically compared the impact of several mRNA features on translation initiation at the first gene in an operon with those for the second gene. Experiments were done in a system with internal control based on dual cerulean and(More)
The Database of Ribosomal Cross-links (DRC) provides a complete collection of all the published data produced by cross-linking studies on the Escherichia coli ribosome, as well as on its components and functional ligands. The DRC currently includes data on 986 cross-links from >100 research papers, yielded by >40 different reagents. For each cross-link,(More)
Five nearly universal methylated guanine-(N2) residues are present in bacterial rRNA in the ribosome. To date four out of five ribosomal RNA guanine-(N2)-methyltransferases are described. RsmC(YjjT) methylates G1207 of the 16S rRNA. RlmG(YgjO) and RlmL(YcbY) are responsible for the 23S rRNA m(2)G1835 and m(2)G2445 formation, correspondingly. RsmD(YhhF) is(More)
Modification of ribosomal RNA is ubiquitous among living organisms. Its functional role is well established for only a limited number of modified nucleotides. There are examples of rRNA modification involvement in the gene expression regulation in the cell. There is a need for large data set analysis in the search for potential functional partners for rRNA(More)
The functional centers of the ribosome in all organisms contain ribosomal RNA (rRNA) modifications, which are introduced by specialized enzymes and come at an energy cost for the cell. Surprisingly, none of the modifications tested so far was essential for growth and hence the functional role of modifications is largely unknown. Here, we show that the(More)
The decoding center of the ribosome provides mRNA translation and the fidelity of the codon--anticodon interactions along with mRNA translocation in the course of protein biosynthesis. The three-dimensional structure of the ribosome decoding center is still unknown. However, up to now a number of direct and indirect experimental data on the structural and(More)
Genome sequencing now progressing much faster than our understanding of the majority of gene functions. Studies of physiological functions of various genes would not be possible without the ability to manipulate the genome. Methods of genome engineering can now be used to inactivate a gene to study consequences, introduce heterologous genes into the genome(More)
Sea urchins are marine invertebrates of extreme diversity of life span. Red sea urchin S. franciscanus is among the longest living creatures of the Ocean. Its lifetime is estimated to exceed a century, while the green sea urchin L. variegatus hardly survives more than four years. We sequenced and compared the genomes of these animals aiming at determination(More)
Chemical landscape of natural RNA species is decorated with the large number of modified nucleosides. Some of those could easily be detected by reverse transcription, while others permit only high-performance liquid chromatography or mass-spectrometry detection. Presence of m(6)A nucleoside at a particular position of long RNA molecule is challenging to(More)