Homology modeling and phylogenetic relationships of catalases of an opportunistic pathogen Rhizopus oryzae.

Aims: A homology modeling methodology was developed and used to obtain the 3D structures for four putative catalases of Rhizopus oryzae in order to assess their functionality.

Main Methods: Homology models were built using different modeling strategies using non-protein compounds as steric constraints, a symmetry constraint to force identical chains and an additional loop modeling algorithm. Percent structural overlap values (SO) were calculated for each model-template pair to qualify the homology models.