Internal Coordinate Mechanics
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Internal Coordinate Mechanics (ICM) is a software program and algorithm to predict low-energy conformations of
coenzymes.[1]
Software
ICM also is a programming environment for various tasks in
internal coordinates such as bond lengths, bond angles torsion angles and phase angles. The efficient and general global optimization method which evolved from the original ICM method is still the central piece of the program. It is this basic algorithm which is used for peptide prediction, homology modeling and loop simulations, flexible macromolecular docking and energy refinement. However the complexity of problems related to structure prediction and analysis, as well as the desire for perfection, compactness and consistency, led to the program's expansion into neighboring areas such as graphics, chemistry, sequence analysis and database searches, mathematics
, statistics and plotting.
The original meaning became too narrow, but the name was kept. The current integrated ICM shell contains hundreds of variables, functions, commands, database and web tools, novel algorithms for structure prediction and analysis into a powerful, yet compact program which is still called ICM. The seven principal areas are centered on a general core of shell-language and data analysis and visualization.
References
- PMID 20946603.
- Abagyan, R.A. and Totrov, M.M. Biased Probability Monte Carlo Conformational Searches and Electrostatic Calculations For Peptides and Proteins J. Mol. Biol., 235, 983–1002, 1994. PMID 8289329
- Abagyan, R.A., Totrov, M.M., and Kuznetsov, D.A. ICM: A New Method For Protein Modeling and Design: Applications To Docking and Structure Prediction From The Distorted Native Conformation. J. Comput. Chem., 15, 488–506, 1994.
- Totrov, M.M. and Abagyan, R.A. Efficient Parallelization of The Energy, Surface and Derivative Calculations For internal Coordinate Mechanics. J. Comput. Chem., 15, 1105–1112, 1994.
External links
- The NERF algorithm for efficient conversion of sequential torsion angles to Cartesian coordinates
- www.molsoft.com
- iSee (interactive Structurally enhanced experience)
- EDS (Electron Density Server) Archived 2017-07-02 at the Wayback Machine (ICM supports electron density visualization)