The decoding center of the ribosome provides mRNA translation and the
fidelity of the codon-anticodon interactions along with mRNA transloca
tion in the course of protein biosynthesis. The three-dimensional stru
cture of the ribosome decoding center is still unknown. However, up to
now a number of direct and indirect experimental data on the structur
al and functional organization of the decoding center have been obtain
ed. In this paper the main components of the decoding center are descr
ibed on the basis of our own experimental results combined with data f
rom the literature. A model of their spatial arrangement at the small
ribosomal subunit is suggested.