[modeller_usage] side-chain chi1 different from the templates

Dear Modeller's I have built a 3D model on 4 structures aligned from Clustalw. In the model built, there is a threonine that bears a dihedral angle different from all equivalent threonines of the templates. Locally I cannot see why this threonine should be different. Would you help me to explain this unprecedented side-chain orientation ? Thank you Aline -- Dr. Aline Thomas Institut de Biologie Structurale Laboratoire de Dynamique Moleculaire 41 rue Jules Horowitz 38027 Grenoble cedex France tel : (+33) (0)4 38 78 95 72 fax : (+33) (0)4 38 78 54 94