Cysteine proteinases play key roles in host-parasite interactions, including host invasion, parasite differentiation, and intracellular survival. Toxoplasma gondii expresses five cysteine proteases, including one cathepsin L-like (TgCPL), one cathepsin B-like (TgCPB) and three cathepsin C-like (TgCPC1, 2 and 3) proteases. We performed the Structural modeling of catalytic domain of TgCPC1 with server I-TASSER, the template selected for homology modeling was Dipeptidyl peptidase I (Cathepsin C) (PDB code: 1JQP). The C-Score of structural modeling of catalytic domain was -0.5; in the L-domain there are nine α-helices and two β-strands and in the right domain there are four β-strands and two α-helices. Cys-440, His-651 and Asn-676, form the cysteine protease catalytic triad in the active site. Adjacent to active site there is a Tyr441 this residue may be involved in the binding of the N terminus of the peptide substrate. A tyrosine residue (Tyr 578) that binds a chloride ion in the crystal structures of rat and human Cathepsin C is also conserved. © Springer International Publishing Switzerland 2014.
CITATION STYLE
León, M. M., Giraldo, D. M. M., Molina, D. A., Arenas, A. F., & Gómez, J. E. (2014). Structural modeling of Toxoplasma gondii TGME49_289620 proteinase. In Advances in Intelligent Systems and Computing (Vol. 232, pp. 301–305). Springer Verlag. https://doi.org/10.1007/978-3-319-01568-2_43
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