MOE 2024 - Molecular Operating Environment

Version: 2024
Installation: /sw/moe/moe2024
Module: moe/2024
License: Commercial (CCG License required)

Overview

MOE (Molecular Operating Environment) is a comprehensive software package for computational chemistry, molecular modeling, and cheminformatics designed for pharmaceutical, biotechnology, and academic research.

MOE integrates visualization, modeling, and simulation tools in a single platform for drug discovery and molecular analysis.

Key Features: - Molecular visualization and 3D graphics - Protein and ligand modeling - Structure-based design - Pharmacophore modeling - Virtual screening and docking - QSAR analysis - Sequence analysis - Chemical database management - SVL (Scientific Vector Language) scripting

Quick Start

Loading the Module

module load moe/2024

Launching MOE

# Start MOE graphical interface
moe

# Start MOE in batch mode
moe -batch input.svl

# Run MOE with specific license server
MOE_LICENSE=port@server moe

Main Applications

1. MOE GUI - Graphical Interface

moe

Interactive molecular visualization
Structure building and editing
Computational chemistry workflows
Database browsing and searching

2. MOE Batch - Command-Line Execution

moe -batch script.svl

Run SVL scripts without GUI
Automated workflows
High-throughput processing

3. MOE/web - Web Server

moeweb start

Web-based access to MOE functionality
Remote molecular modeling

Common Workflows

Protein Preparation

# Open protein structure
moe protein.pdb

# In MOE GUI:
# - Compute → Prepare → Structure Preparation
# - Add hydrogens
# - Optimize H-bond network
# - Energy minimize

Molecular Docking

# MOE docking workflow
moe -batch dock_workflow.svl

Example SVL script for docking:

// dock_workflow.svl
function Dock_Workflow []
    local receptor = 'protein.pdb';
    local ligands = 'ligands.sdf';

    // Load receptor
    ReadPDB receptor;

    // Define binding site
    SetActiveSite [];

    // Run docking
    Dock [ligands: ligands, receptor: receptor];

    // Save results
    WriteMDB 'docking_results.mdb';
endfunction

Virtual Screening

# Screen compound library
moe -batch virtual_screen.svl

Pharmacophore Modeling

# Create pharmacophore from active compounds
moe -load actives.mdb

File Formats

MOE supports multiple molecular file formats:

Format	Extension	Description
MOE	`.moe`	Native MOE format
MDB	`.mdb`	MOE molecular database
PDB	`.pdb`	Protein Data Bank
SDF	`.sdf`, `.sd`	Structure Data File
MOL2	`.mol2`	Tripos MOL2
SMILES	`.smi`	Simplified molecular input
FASTA	`.fasta`	Sequence files

SVL Scripting

MOE's Scientific Vector Language (SVL) enables automation:

// Example: Calculate molecular properties
function CalcProperties [molfile]
    local mol = ReadMolecule molfile;
    local mw = mol_Weight mol;
    local logp = xlogP mol;
    local hba = HBA mol;
    local hbd = HBD mol;

    print ['MW': mw, 'LogP': logp, 'HBA': hba, 'HBD': hbd];
endfunction

Run SVL scripts:

moe -batch calculate.svl
moe -exec "print mol_Weight 'molecule.mol2'"

Environment Variables

Variable	Purpose
`MOE`	MOE installation directory
`MOE_LICENSE`	License server (format: `port@server`)
`MOE_SVL_LOAD`	Additional SVL library paths
`MOE_BATCH`	Batch mode settings

Integration with Cluster

Batch Jobs

MOE can run on cluster compute nodes via Slurm:

#!/bin/bash
#SBATCH --job-name=moe_docking
#SBATCH --cpus-per-task=4
#SBATCH --mem=8G
#SBATCH --time=24:00:00

module load moe/2024

# Run MOE batch job
moe -batch docking_script.svl -cpus 4

Parallel Processing

MOE supports multicore calculations:

moe -cpus 8 -batch parallel_job.svl

Sample Data

MOE includes sample files for learning:

# Sample projects and tutorials
ls $MOE/sample/

# Protein-ligand examples
ls $MOE/sample/project/

# SVL script examples
ls $MOE/lib/svl/run/

Documentation

Local HTML Documentation: $MOE/html/index.htm
Official Website: https://www.chemcomp.com/
MOE Manual: https://www.chemcomp.com/MOE-Molecular_Operating_Environment.htm
SVL Reference: $MOE/html/moe/fcnindex.htm
Tutorials: $MOE/html/tutorials/

Accessing Documentation

# Open documentation in browser
firefox $MOE/html/index.htm &

# Or copy path to your local machine
echo $MOE/html/index.htm

Tips and Best Practices

Save Work Frequently: MOE projects can be large; save regularly
Use MDB Format: MOE database format is efficient for large datasets
Script Repetitive Tasks: Use SVL for automation
Memory Management: Large molecules may need increased memory
License Management: Check license availability before long jobs

Troubleshooting

License Issues

# Check license status
moe -licenseinfo

# Set license server explicitly
export MOE_LICENSE=1055@license-server

Graphics Problems

# Software rendering mode
moe -softgl

# Check OpenGL support
glxinfo | grep OpenGL

Performance Issues

Use -cpus N to specify number of processors
Increase memory allocation for large systems
Consider batch mode for long calculations

Support

For technical support and questions: - Chemical Computing Group: https://www.chemcomp.com/Support.htm - MOE Support Forum: https://www.chemcomp.com/forum/ - Cluster Admin: Contact cluster administrators for module-specific issues

schrodinger/2025-3 - Alternative molecular modeling suite
vmd/2.0 - Molecular visualization
gromacs/2025.0 - Molecular dynamics simulations

Last Updated: October 2025
Module Maintainer: XLence Cluster Administration