Biopolym. Cell. 2005; 21(5):446-453.
Analysis of unstructured regions of human cytoplasmic tyrosyl-tRNA synthetase by methods of bioinformatics
1Odynets K. A., 1Kornelyuk A. I.
  1. Institute of Molecular Biology and Genetics, NAS of Ukraine
    150, Akademika Zabolotnoho Str., Kyiv, Ukraine, 03680


The prediction of unstructured regions of mammalian cytoplasmic tyrosyl-tRNA synthetase is carried out by bioinformatics methods using 15 web-servers. High probability of unfolded state for flexible “KMSKS» loop of catalytic centre (residue Pro216-Lys231), which getting certain conformation during catalytic act is shown. For the region of intermodule linker (residues Asp343-Glu359) the highest probability of its unstructured state is shown. The comparison of these data with B-factor values for Ca-atoms of crystallographic structures of N- and C-terminal modules shows a strong correlation between the bioinformatics and X-ray analyses data. The presence of flexible intermodular linker is a characteristic feature of proteins which contain the EMAP II-like-terminal module. The hypothesis is proposed about a possible conformational rearrangement of this linker region which may be essential upon the complex formation between these proteins and tRNAs.
Keywords: tyrosyl-tRNA synthetase, disordered regions, bioinformatics


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