%0 Journal Article
%T A theoretical model of the tridimensional structure of Bacillus thuringiensis subsp. medellin Cry 11Bb toxin deduced by homology modelling
%A Gutierrez Pablo
%A Alzate Oscar
%A Orduz Sergio
%J Mem¨®rias do Instituto Oswaldo Cruz
%D 2001
%I Instituto Oswaldo Cruz, Minist¨¦rio da Sa¨²de
%X Cry11Bb is an insecticidal crystal protein produced by Bacillus thuringiensis subsp. medellin during its stationary phase; this  -endotoxin is active against dipteran insects and has great potential for mosquito borne disease control. Here, we report the first theoretical model of the tridimensional structure of a Cry11 toxin. The tridimensional structure of the Cry11Bb toxin was obtained by homology modelling on the structures of the Cry1Aa and Cry3Aa toxins. In this work we give a brief description of our model and hypothesize the residues of the Cry11Bb toxin that could be important in receptor recognition and pore formation. This model will serve as a starting point for the design of mutagenesis experiments aimed to the improvement of toxicity, and to provide a new tool for the elucidation of the mechanism of action of these mosquitocidal proteins.
%K homology modelling
%K -endotoxin structure
%K Cry proteins
%K Bacillus thuringiensis
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762001000300013