Posts Tagged Dynamics
The proton driven turbine cranking out ATP – beautifully animated.
More background info at http://www.mrc-mbu.cam.ac.uk/research/atp-synthase.
shared by Rajini Rao via google+.
To continue with examples in communicating “what is it all good for”: the University of British Columbia’s former “iCapture Centre” (now James Hogg Research Centre) has done a great piece on linking Asthma treatment with the underlying genetic and molecular mechanisms. (Here is Part1 and Part2)
They did some impressive work for nature on RNAi:
This series of three animations was created for Nature Reviews Genetics in 2004, built originally to live on Nature’s site temporarily, perhaps a month or so.
Seven years later, with millions of hits, it has proven to be one of the most popular things Nature has ever had on its site.
Plans are in the works to revisit the piece, since much has been learned about RNAi in the interrim. Look for the new RNAi animation by the end of 2011.
Proteins are not static entities – since we live at about 300 degrees above absolute zero there is constant Brownian motion. However, looking at deposited X-Ray structures, one might get the impression that the structures are rigidly sitting in vacuum – nothing could be further from the truth! I like the analogy with early photography :
because the photoplates were not that sensitive, long exposure times were necessary. Hence people had to hold very, very still for several minutes in order to get a decent picture. Photographers had special setups and chairs with neckbraces to keep the poor subject in place. This apparatus is the analogy to a protein crystal – it keeps the proteins in place, floppy and moving parts will not show up on the resulting electron-density maps.
The photographs of our great-grandfathers leave us with the impression that they were very stiff people, largely devoid of any humour. That’s probably not true, but how happy and lively would you look if you had to sit still for quite some time in your best outfit with your head squeezed onto some weird mechanical contraption? The same holds true for proteins. Read the rest of this entry »
Along the lines of Cloud and High Performance Computing (HPC) Amazon pushes its web-services into research applications : “With Amazon Web Services businesses and researchers can easily fulfill their high performance computational requirements with the added benefit of ad-hoc provisioning and pay-as-you-go pricing.” The image above has a link to the tutorial on setting up a HPC environment in less than 10 minutes – demonstrating the setup of a 7-node virtual cluster and running a molecular dynamics simulation with CHARMM.
Similarly, the power of current many-core (>500 cores!) general-purpose graphics processing units (gpGPUs) can be awesome, of course the code has to be adjusted to take full advantage of the architecture. The release of the CUDA Toolkit 4.0 (Common Universal Device Architecture) in April simpliﬁed parallel programming already
and foreshadowed future CPU-GPU architectures. Think yesterdays beowulf-cluster shrunk to a single card that fits into your desktop machine. Depending on the application, GPUs seems to pack at least 10x the punch of a comparable CPU, for Amber this factor seems to be about 20x. NVidia has a test-drive of Amber available … Simulators, start your engines! Also there are a couple of standard Bioinformatics applications readily available for GPUs. Just last week, they announced “New NVIDIA Tesla GPU Smashes World Record in Scientific Computation“. Allegedly, this was achieved on only 4(!) GPUs – that fits into a midi-tower under the desk. Imagine if you’d stuff a full-height 19inch rack with these beasts – you’d not quite get to something like the Nebulae or Tianhe1A but definitely would land somewhere among the TOP500 Supercomputers in the world.
And finally in this category, also Googles App-Engine (GAE) is developing nicely, although I haven’t yet found a bioinformatics-related pet-project that would motivate me to test it more thoroughly. “App Engine enables your application to scale automatically without worrying about managing machines.“. Yep, that’s the spirit.