): This proposal aims at defining the interactions that the retroviral structural proteins (Gag) make with each other and with other viral components to form infectious virus particles. Of particular interest is the mechanism by which Gag proteins oligomerize to form virions. Analysis will include the structures of Gag monomers, interactions made between Gag proteins, and Gag-RNA associations. To this end, biophysical and molecular approaches will be applied to determine the virus particle structure. Two specific approaches are proposed. The first utilizes purified histidine-tagged retrovirus Gag proteins and derivatives to make two dimensional and helical proteins and protein plus RNA arrays on lipid monolayers, bilayers, and rod structures containing novel nickel-chelating lipids. Arrays will be analyzed to define Gag and RNA interactions by image enhancement-electron diffraction methods. Gag-RNA binding studies will be performed to identify factors required for specific encapsidation of viral RNAs. The second approach utilizes wild type and mutant virus particles to evaluate their effects on particle assembly and structure. Cysteines will be substituted into the Gag protein and used in crosslinking studies. This will be used to identify proteins which bind to the Gag major homology region (MHR) and the Fv1 N/B tropism determinant.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
2R01GM052914-04
Application #
2701696
Study Section
Virology Study Section (VR)
Project Start
1995-09-01
Project End
2002-08-31
Budget Start
1998-09-01
Budget End
1999-08-31
Support Year
4
Fiscal Year
1998
Total Cost
Indirect Cost
Name
Oregon Health and Science University
Department
Neurosciences
Type
Schools of Medicine
DUNS #
009584210
City
Portland
State
OR
Country
United States
Zip Code
97239