Hello All- I trust everyone had a nice holiday break and a Happy New Year! Today, we are excited to kick the new year off with a new release of our QM/MM refinement and analysis plugin for the Phenix platform. The full announcement, along with links to the details and licensing information, is available at this URL: http://www.quantumbioinc.com/news/show/DDS-012017 Thanks to our many users - academic, industrial, and government - who have provided feedback and support for this effort. This plugin, available within the DivCon Discovery Suite version 7.1, has a number of significant improvements applicable to users of Phenix including: * QM/MM X-ray Refinement Standard: Version 7.1 represents a complete overhaul of our MM and QM/MM implementation for improved stability, performance, and usability. Our fully automated QM/MM implementation has now come out of "beta" status and it is ready for production use. The implementation also supports truncated residues, multiple regions, and integrated ligand atom typing. * Application: Fragment Based Drug Design: Phenix/DivCon coupled with the novel, our patent pending XModeScore tool has been applied to several key areas including protomer/tautomer determination, binding mode selection, crystal water positioning, and now even fragment-based screening. We have provided a tutorial of MOE-based fragment docking coupled with XModeScore-based selection. * New Structure/Chemistry Analyses: The question we often hear from new users is how one can evaluate the performance of QM and QM/MM X-ray refinement vs. more conventional methods. We have now packaged several before/after analyses within refinement including Clash Scores (using phenix.molprobity); Strain, Interaction Energies, and ZDD (using DivCon); and GBVI/WSA dG binding score prediction (using MOE - as available). * New Feature [beta] - Protonation: Fast, integrated protonation and hydrogen bond network optimization is a perpetual problem in the field (especially in X-ray crystallography). This method uses a combination of dead end elimination and graph theory along with crystallographic symmetry and density - as available - to quickly and accurately determine the correct protonation states of bound ligands, active sites, waters, and protein/DNA/RNA. If you are interested in using or evaluating our linear scaling, quantum mechanics software in your drug discovery efforts or if you would like to schedule an on-line or on-site meeting to discuss the technology, please email [email protected] and let us know. And as with last year, we are waiving the license free for non-profit, academic users as per academic license agreement. Our academic, commercial, consulting, and evaluation licenses are available on-line (most for electronic signature): http://www.quantumbioinc.com/products/software_licensing Have a great 2017! -Lance ____________________ Lance M. Westerhoff, Ph.D. President and General Manager QuantumBio Inc. WWW: http://www.quantumbioinc.com Email: [email protected] Phone: 814-235-6908 Fax: 814-235-6909 This message and any attachments are solely for the intended recipient and should be considered confidential. If you are not the intended recipient, please immediately and permanently delete.