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Research Interest:
The Ausubel lab has developed a system using model organisms as hosts
for pathogen infection. Specifically, Arabidopsis thaliana and
Caenorhabditis elegans are genetically tractable organisms that
can be infected with Pseudomonas aeruginosa. The utility of this
system allows for the rapid screening for bacterial mutants attenuated
in pathogenesis and subsequent identification of microbial virulence factors.
In addition, host mutants can be isolated and further characterized with
this system with the goal of identifying host mechanisms that result in
pathogen resistance. Recently, our lab has isolated several C. elegans
mutants exhibiting enhanced susceptibility
to infection-mediated killing by P. aeruginosa (esp
mutants). My main focus is on the phenotypic and molecular characterization
of one of these Esp mutants, namely, esp-3.
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Publicarions:
- Villanueva, J.M. and Ausubel, F.M. (Manuscript in
preparation) (2002).
Esp-3 encodes a novel
serine threonine protein kinase involved in Cenorhabditis elegans
innate immunity.
- Miyata, S., Villanueva, J.M., Lee, D.G., Sifri,
C.D., Ausubel, F.M., and Drenkard, E. (Manuscript in preparation) (2002).
Efficacy of screening for Pseudomonas aeruginosa
mutants attenuated in virulence using a Galleria mellonella infection
model.
- Villanueva, J.M., Broadhvest, J., Hauser, B.A.,
Meister, R.J., Schneitz, K., and Gasser, C.S. (1999).
INNER NO OUTER, regulates
abaxial-adaxial patterning in Arabidopsis ovules.
Genes and Development. 13, 3160-3169.
- Hauser, B.A., Villanueva, J.M., and Gasser, C.S.
(1998)
Arabidopsis TSO1
regulates directional processes in cells during floral organogenesis.
Genetics 150, 411-423.
- Baker, S.C., Robinson-Beers, K., Villanueva, J.M.,
Gaiser, J.C., and Gasser, C.S. (1996)
Interaction Among Genes Regulating Ovule Development
in Arabidopsis thaliana.
Genetics 145, 1109-1124.
- Davis, R.E., Singh, H., Botka, C., Hardwick, C.,
Ashraf el Meanawy, M., Villanueva, J. (1994).
RNA trans-splicing in Fasciola hepatica.
Identification of a spliced leader (SL) RNA and SL sequences on mRNAs.
Journal of Biological Chemistry 269, 20026-20030.
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