Easy-to-use and complete desktop-modeling environment for a biologist or a chemist interested in molecular structure and function.

Platforms Available : Windows 7/Vista/XP/NT/2000, Linux/i386/AMD64, SGI IRIX, Mac OS X

ICM-Pro add-ons : ICM-Homology, and ICM-VLS

ICM-Pro Background

ICM-Pro empowers a biologist or chemist with lightning fast access and high quality interactive 3D views to the entire sturctural database. In just a few seconds you can browse hundreds of structures of interest load them, analyze and visualize sequences, structures, alignments, sites, study pockets and bound ligands and drugs, study surfaces, electrostatics, mutations, sequence conservations, perform docking of small molecules as well as protein-protein docking. ICM supports multiple input formats. You can search structural database by field, sequence pattern and get an interactive table for instant viewing. ICM offers a rich graphical environment and powerful views for professional quality of images and molecular animation videos.

Features

	Protein Structure Analysis. ICM-Pro provides a direct link to the Protein Data Bank (PDB). Once you have downloaded a structure you can analyse the structure - flagging problem regions, superimpose multiple structures, analyse distances and angles, calculate contact and surface areas and electrostatic properties amd much etc... Read more...
	Crystallographic Analysis Tools. The key to understanding a protein structure is to fully evaluate the underlying crystallographic information contained within a PDB file. For example it is important to understand the full biological unit of a protein to identify if crystal-crystal contacts have influenced the structure or for example, contour the electron density to see how much of a ligand was seen by the crystallographer in the active site. Read more...
	Small Molecule Docking. ICM-Pro provides a unique set of tools for the modeling of protein/ligand interactions. ICM-Pro performs fast and accurate docking of fully continuously flexible small molecule ligands to a protein represented by grid interaction potentials. There are also inbuilt procedures to account for induced fit which include multiple receptor docking (4D docking) and explicit receptor docking. Read more...
	Protein- Protein Docking. ICM-Pro contains a well validated and successful protein-protein docking algorithm. ICM-Pro has consistently performed very well at the worldwide CAPRI protein-protein docking competition. ICM-Pro also contains an algorithm to predict protein-protein docking interaction sites. Read more...
	Protein Structure Prediction. ICM-Pro has a good record in protein modeling. There are procedures which will regularize or build the backbone, shake up the side-chains and loops by global energy optimization. You can also perform simulations of small peptide folding. Read more...
	Bioinformatics Tools. The ICM-Pro package allows users to search a sequence database with high-quality global pairwise and multiple alignment algorithms. Also allows pattern searches, prosite and profile searches. Multiple sequence alignments are fast, the algorithm produces evolutionary trees, principal component views, annotation transfer from sequence to structures, threading and alignment visualization tools. Read more...
	Electrostatics. The Poisson equation for a molecule of any size can be efficiently solved using the boundary element algorithm that does not depend on any grid, and uses the exact analytical molecular surface as the boundary. ICM-REBEL calculates the accurate electrostatic potential of a molecule using boundary element algorithm and generates a 3D surface skin model colored by potential.Solves the Poisson equation for a molecule with exact positions of electric charges. Read more...
	Chemistry Tools. A variety of chemistry tools are available. Chemicals can be sketched in the ICM Molecular Editor and viewed in a chemical spreadsehhet. Read more...
	Molecular Graphics.Utilize a full and robust array of graphics tools all accessible from a GUI interface. Display your molecules in wire, CPK, ball&stick, worm, ribbon, accessible surface, transparent molecular surface, perspective, depth cueing, smooth and rugged solid surfaces. Use both hardware and side-by-side stereo. Read more...

Minimum Specifications

See the Minimum Specifications required to run the ICM-Pro software.

References

ICM Methods

Abagyan, R.A., Totrov, M.M., and Kuznetsov, D.A. (1994) ICM: A New Method For Protein Modeling and Design: Applications To Docking and Structure Prediction From The Distorted Native Conformation J. Comp. Chem. 15, 488-506. A description of the original ICM method.

Abagyan, R.A. and Totrov, M.M. (1994) Biased Probability Monte Carlo Conformational Searches and Electrostatic Calculations For Peptides and Proteins J. Mol. Biol. 235, 983-1002. Description of the ICM highly efficient global optimization procedure.

Abagyan, R.A. and Totrov, M.M. (2001) Rapid boundary element solvation electrostatics calculations in folding simulations: successful folding of a 23-residue peptide. Biopolymers. 60(2):124-33 Description of the electrostatics REBEL method

Drug Binding Pocket Identification

An J, Totrov M, Abagyan R. (2005) Pocketome via comprehensive identification and classification of ligand binding envelopes. Mol Cell Proteomics. 2005 Jun;4(6):752-61. A new fully-validated algorithm for the prediction of ligand binding sites with high accuracy.

Fernandez-Recio, J., Totrov, M., Skorodumov, C., Abagyan, R. (2005) Optimal Docking Area: A New Method for Predicting Protein-Protein Interaction Sites. Proteins 57:400-13. A state-of-the-art method for the prediction of protein-protein interaction sites.

Protein-Protein Docking

Fernandez-Recio, J., Totrov, M., and Abagyan, R. ICM-DISCO (2003) Docking by Global Energy Optimization with Fully Flexible Side-Chains Proteins 52:113-117. The ICM Protein-Protein docking method, which ranked highly in the worldwide CAPRI docking competition. See the two papers below by Mendez et al. for evaluation of results.

Mendez R, Leplae R, Lensink MF, Wodak SJ. (2005) Assessment of CAPRI predictions in rounds 3-5 shows progress in docking procedures. Proteins. 2005 Aug 1;60(2):150-69.

Mendez R, Leplae R, De Maria L, Wodak SJ. (2003) Assessment of blind predictions of protein-protein interactions: current status of docking methods. Proteins. 2003 Jul 1;52(1):51-67.