This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. Bacteriophage Epsilon15 is a generalized transducing phage infecting the human/animal pathogen Salmonella enterica serovar Anatum. Epsilon 15 has been studied for its ability to recognize and bind O-antigen as well as its capacity to alter host lipopolysaccharide in the lysogenic state. The viral protein responsible for O-antigen recognition is the tailspike protein. The virion contains at least six structural proteins and an approximately 40 kb dsDNA genome of known sequence. At the sequence level, the structural proteins most closely resemble the Bcep phages of Burkholderia, a human pathogen affecting cystic fibrosis patients. The virion structural proteins and chromosome together make a particle with a mass of approximately 66 Megadaltons and a diameter of roughly 6500 ?. Jon King's lab has used mass spectrometric methods to identify those open reading frames encoding virion structural proteins. The structure of this virus will reveal the arrangement of structural proteins and, in particular, the configuration of those subunits more directly involved in attachment to the host and passage of DNA into the cytoplasm. A genetic approach is now underway to isolate amber mutants in virus structural proteins. Macromolecular subassemblies formed during infections with these mutant phage will be purified and imaged by reconstruction. These mutant phage will also serve as reagents for imaging the interactions between virus and lipopolysaccharide and receptor proteins at the surface of the host.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR002250-26
Application #
8361071
Study Section
Special Emphasis Panel (ZRG1-BCMB-T (41))
Project Start
2011-01-01
Project End
2011-12-31
Budget Start
2011-01-01
Budget End
2011-12-31
Support Year
26
Fiscal Year
2011
Total Cost
$98,074
Indirect Cost
Name
Baylor College of Medicine
Department
Physiology
Type
Schools of Medicine
DUNS #
051113330
City
Houston
State
TX
Country
United States
Zip Code
77030
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