The objective is to gain knowledge of the genetics and physiology of poliovirus. Two specific areas will receive primary attention: viral RNA synthesis and viral genetics. The study of RNA metabolism will focus on the recent evidence that the host-factor needed to allow initiation of minus strand synthesis by the viral polymerase may be terminal uridyl transferase (TUT). The association of host-factor with TUT will be examined critically, primarily through the generation of monoclonal antibodies. The possibility will be examined that viral RNA synthesis involves first the formation of a hairpin, and then its cleavage leaving VPg at the 5'-end. Viral genetic studies will concentrate on the use of an infectious polio cDNA clone to generate and study defined mutants. Five good mutants have already been generated using three insertion or deletion methods and more mutants will be sought using the same methods. Complementation and recombination among the mutants will be studied. Inertypic recombinants will be examined to determine what sequences are involved in recombination. The phenotypes of the mutants will be examined to link individual proteins to specific functions and to understand the range of functions involved in poliovirus growth. Because poliovirus is a prototype of all picornaviruses, these studies will be applicable to many viral systems.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Method to Extend Research in Time (MERIT) Award (R37)
Project #
5R37AI022346-04
Application #
3481175
Study Section
Virology Study Section (VR)
Project Start
1984-07-01
Project End
1990-12-31
Budget Start
1987-01-01
Budget End
1987-12-31
Support Year
4
Fiscal Year
1987
Total Cost
Indirect Cost
Name
Whitehead Institute for Biomedical Research
Department
Type
DUNS #
076580745
City
Cambridge
State
MA
Country
United States
Zip Code
02142
Pear, W S; Aster, J C; Scott, M L et al. (1996) Exclusive development of T cell neoplasms in mice transplanted with bone marrow expressing activated Notch alleles. J Exp Med 183:2283-91
Connor, R I; Chen, B K; Choe, S et al. (1995) Vpr is required for efficient replication of human immunodeficiency virus type-1 in mononuclear phagocytes. Virology 206:935-44
Gurish, M F; Pear, W S; Stevens, R L et al. (1995) Tissue-regulated differentiation and maturation of a v-abl-immortalized mast cell-committed progenitor. Immunity 3:175-86
Saksela, K; Cheng, G; Baltimore, D (1995) Proline-rich (PxxP) motifs in HIV-1 Nef bind to SH3 domains of a subset of Src kinases and are required for the enhanced growth of Nef+ viruses but not for down-regulation of CD4. EMBO J 14:484-91
Saksela, K; Stevens, C; Rubinstein, P et al. (1994) Human immunodeficiency virus type 1 mRNA expression in peripheral blood cells predicts disease progression independently of the numbers of CD4+ lymphocytes. Proc Natl Acad Sci U S A 91:1104-8
Chen, B K; Saksela, K; Andino, R et al. (1994) Distinct modes of human immunodeficiency virus type 1 proviral latency revealed by superinfection of nonproductively infected cell lines with recombinant luciferase-encoding viruses. J Virol 68:654-60
Andino, R; Silvera, D; Suggett, S D et al. (1994) Engineering poliovirus as a vaccine vector for the expression of diverse antigens. Science 265:1448-51
Cheng, G; Ye, Z S; Baltimore, D (1994) Binding of Bruton's tyrosine kinase to Fyn, Lyn, or Hck through a Src homology 3 domain-mediated interaction. Proc Natl Acad Sci U S A 91:8152-5
Saksela, K; Muchmore, E; Girard, M et al. (1993) High viral load in lymph nodes and latent human immunodeficiency virus (HIV) in peripheral blood cells of HIV-1-infected chimpanzees. J Virol 67:7423-7
Andino, R; Rieckhof, G E; Achacoso, P L et al. (1993) Poliovirus RNA synthesis utilizes an RNP complex formed around the 5'-end of viral RNA. EMBO J 12:3587-98

Showing the most recent 10 out of 25 publications