QSite

A high-performance QM/MM program

QSite

Overview

QSite is a multi-scale simulation tool that utilizes the QM/MM method, which combines the principles of quantum mechanics and molecular mechanics. It is designed to accurately predict the molecular configurations, energetics, and the electronic structures of a reactive system through quantum chemical treatment of atoms, providing crucial insights into reactive chemistry essential for understanding chemical transformation in the presence of intermolecular interactions. QSite is equally applicable for describing non-reacting chemical systems.

Key Capabilities

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High performance

Outperforms other QM/MM programs because it takes advantage of Jaguar, long recognized as the industry leader in QM calculations.

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Advanced technology

Provides an innovative approach to the QM/MM interface specifically addressing protein systems and interactions between QM and MM regions.

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Transition metal convergence

Achieves a high degree of accuracy in metalloproteins thanks to Jaguar’s advanced capabilities; it reliably and efficiently converges to the correct ground state of transition metal containing systems.

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Wavefunction choices

Offers different levels of theory to evaluate the QM region: Hartree Fock, DFT, and local MP2. This allows the user to choose the best balance between computational cost and accuracy.

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Advanced calculation setup and analysis

Automatically applies special interface parameters, making it simple to set up calculations. Computed results, such as molecular orbitals and electron densities, can be visualized within Maestro.

Documentation & Tutorials

Get answers to common questions and learn best practices for using Schrödinger’s software.

Life Science Tutorial

Defining QM and MM regions in QSite

Define regions to treat with QM and with MM for a QSite calculation.

Materials Science Tutorial

Kinetic Monte Carlo (KMC) Charge Mobility

Learn how to calculate charge mobility in semiconducting molecular devices.

Related Products

Learn more about the related computational technologies available to progress your research projects.

FEP+

High-performance free energy calculations for drug discovery

Jaguar

Quantum mechanics solution for rapid and accurate prediction of molecular structures and properties

Maestro

Complete modeling environment for your molecular discovery

MS Mobility

Atomistic simulation and analysis of charge mobility in solid-state films of organic semiconductors

MS Maestro

Complete modeling environment for your materials discovery

Publications

Browse the list of peer-reviewed publications using Schrödinger technology in related application areas.

Materials Science Publication

Sub-micro- and nano-sized polyethylene terephthalate deconstruction with engineered protein nanopores

Life Science Publication

Light Harvesting by Equally Contributing Mechanisms in a Photosynthetic Antenna Protein

Life Science Publication

Mechanistic and Computational Studies of the Reductive Half-Reaction of Tyrosine to Phenylalanine Active Site Variants of d-Arginine Dehydrogenase

Life Science Publication

Water in the active site of ketosteroid isomerase

Life Science Publication

Insights into the different dioxygen activation pathways of methane and toluene monooxygenase hydroxylases

Life Science Publication

Carbon Monoxide Dehydrogenase Reaction Mechanism: A Likely Case of Abnormal CO2 Insertion to a Ni-H- Bond

Life Science Publication

Unexpected electron transfer mechanism upon AdoMet cleavage in radical SAM proteins

Life Science Publication

Lead identification of acetylcholinesterase inhibitors-histamine H3 receptor antagonists from molecular modeling

Life Science Publication

Structure-guided discovery of cyclin-dependent kinase inhibitors

Life Science Publication

Intermediates in dioxygen activation by methane monooxygenase: a QM/MM study

Training & Resources

Online certification courses

Level up your skill set with hands-on, online molecular modeling courses. These self-paced courses cover a range of scientific topics and include access to Schrödinger software and support.

Tutorials

Learn how to deploy the technology and best practices of Schrödinger software for your project success. Find training resources, tutorials, quick start guides, videos, and more.