Construction of three-dimensional models of Arabidopsis thaliana FtsZ-proteins on basis of crystal structure of archaebacterial FtsZ-GDP complex

Demchuk O.N., Nyporko A.Yu., Blume Ya.B.

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Three-dimensional models of FtsZ-protein complexes with GDF from Arabidopsis thaliana L. localized in cytosol (Entrez database code NP190843) and in chloroplasts (Entrez database code AAA82068) were developed. Crystal structure of the FtsZ-GDP complex from archaea Methanococcus jannaschii (PDB-code 1FSZ) was used as a matrix. Secondary structures of computed models contain ten β-strands. A chloroplast form of FtsZ-protein has ten α-helices and four 3₁₀-helices, whereas cytosolic form of protein has nine and three structures correspondently and neither a0-helix before nucleotide-binding domain nor C-terminal 3₁₀-helix in secondary domain. The T2-loop of nucleotide-binding pocket of chloroplast form of FtsZ-ptotein in position 49 contains non-charged alanin residue instead of the charged one which is typical for cytosolic and bacterial forms of proteins. At low sequence homology of FtsZ-proteins (approximately 47 %) the developed models demonstrate high coincidence with matrix both in the structures of nucleotide-binding pocket and in the whole molecule. The models are completely suitable for further studies of possible sites of binding with dinitroaniline herbicides.

Tsitologiya i Genetika 2006, vol. 40, no. 1, pp. 10-20

Demchuk O.N., Nyporko A.Yu., Blume Ya.B. Construction of three-dimensional models of Arabidopsis thaliana FtsZ-proteins on basis of crystal structure of archaebacterial FtsZ-GDP complex, Tsitol Genet., 2006, vol. 40, no. 1, pp. 10-20.