Highlights of our Work
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Human immunodeficiency virus type 1 (HIV-1) is the major cause of
AIDS, for which treatments need to be developed continuously as the
virus becomes quickly resistant to new drugs. When the virus infects
a human cell it releases into the cell its capsid, a closed, stable
container protecting the viral genetic material. However, interaction
with the cell triggers at some point an instability of the capsid,
leading to a well timed release of the genetic material that merges
then with the cell's genes and begins to control the cell. The dual
role of the capsid, to be functionally both stable and unstable, makes
it in principle an ideal target for antiviral drugs and, in fact,
treatments of other viral infections successfully target the
respective capsids. The size of the HIV-1 capsid (about 1,300
proteins), and its irregular shape had prevented so far the resolution
of a full capsid atomic-level structure. However, in a tour de force
effort, groups of experimental and computational scientists have now
resolved the capsid's chemical structure (deposited to the protein
data bank under the accession codes 3J3Q
and 3J3Y).
As reported
recently (see also journal cover), the
researchers combined NMR structure analysis, electron microscopy and
data-guided molecular dynamics
simulations utilizing VMD to prepare
and analyze simulations performed using NAMD on one of the most powerful computers
worldwide, Blue
Waters, to obtain and characterize the HIV-1 capsid. The
discovery can guide now the design of novel drugs for enhanced
antiviral therapy.
More information is available on our virus website, in video, and in a press release.