NAMD - Scalable Molecular Dynamics

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Parallel Programming Laboratory

Bionumerics Research Group

NAMD, recipient of a 2002 Gordon Bell Award, is a parallel molecular dynamics code designed for high-performance simulation of large biomolecular systems. Based on Charm++ parallel objects, NAMD scales to hundreds of processors on high-end parallel platforms and tens of processors on commodity clusters using gigabit ethernet. NAMD uses the popular molecular graphics program VMD for simulation setup and trajectory analysis, but is also file-compatible with AMBER, CHARMM, and X-PLOR. NAMD is distributed free of charge with source code. You can build NAMD yourself or download binaries for a wide variety of platforms. Our tutorials show you how to use NAMD and VMD for biomolecular modeling.

NAMD reference paper: Scalable molecular dynamics with NAMD.

Other Spotlights

Spotlight: Hook and Sensor of Cells (Nov 2006)

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Mammalian cells adhere to each other forming tissues. The adhesion is due to a network of proteins, so-called extracellular matrix proteins, "gluing" the cells together. The cell membranes are too soft to provide anchoring points for the extracellular matrix proteins; rather, the cells furnish on their outer surface specialized hooks for anchoring the extracellular matrix proteins. The hooks, in the form of surface proteins, are linked directly through the membranes to the intracellular cytoskeleton that stabilizes and shapes cells. Integrins are an important family of such surface proteins that form hooks specific for certain types of extracellular matrix proteins. The hooks are flexible, they can be open for contacts or closed, the switch being induced by signals from inside or outside the cell through interactions with other proteins. The interactions between integrins and extracellular matrix proteins are rather complex, as the proteins are composed of many subunits; fortunately, their overall structures are presently being solved through crystallography. In a recent report a major component of an integrin and an extracellular matrix protein have been investigated through molecular modeling using NAMD, including steered molecular dynamics. The study described in detail how the extracellular matrix protein induces a transition in integrin, potentially strengthening its adhesion property. See also previous highlights: the May 2006 "Killer's Entry Route", Dec 2004 "Snap Fastener on Biological Cells", Dec 2003 "Body's Glue", and Mar 2002 "Cells Sense Push and Pull". More on modeling of extracellular matrix proteins and integrins can be found here.

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Spotlight: Hook and Sensor of Cells (Nov 2006)

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