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Joshua P. Ramsay


Ph.D. in Genetics, Department of Microbiology & Immunology, University of Otago, New Zealand, 2008

Current position

Lecturer in Microbiology and Molecular Genetics, Curtin University, Australia


  1. Tan, H., West, J. A., Ramsay, J. P., Monson, R. E., Griffin, J. L., Toth, I. K. and Salmond, G. P. (2014). Comprehensive overexpression analysis of cyclic-di-GMP signalling proteins in the phytopathogen Pectobacterium atrosepticum reveals diverse effects on motility and virulence phenotypes. Microbiology 160(Pt 7): 1427-1439.
  2. Fineran, P. C., Cans, M. C. I., Ramsay, J. P., Wilf, N. M., Cossyleon, D., McNeil, M. B., Williamson, N. R., Monson, R. E., Becher, S. A. and Stanton, J.-A. L. (2013). Draft genome sequence of Serratia sp. strain ATCC 39006, a model bacterium for analysis of the biosynthesis and regulation of prodigiosin, a carbapenem, and gas vesicles. Genome announcements 1(6): e01039-01013.
  3. Wilf, N. M., Reid, A. J., Ramsay, J. P., Williamson, N. R., Croucher, N. J., Gatto, L., Hester, S. S., Goulding, D., Barquist, L. and Lilley, K. S. (2013). RNA-seq reveals the RNA binding proteins, Hfq and RsmA, play various roles in virulence, antibiotic production and genomic flux in Serratia sp. ATCC 39006. BMC genomics 14(1): 822.
  4. Ramsay, J. P., Major, A. S., Komarovsky, V. M., Sullivan, J. T., Dy, R. L., Hynes, M. F., Salmond, G. P. and Ronson, C. W. (2013). A widely conserved molecular switch controls quorum sensing and symbiosis island transfer in Mesorhizobium loti through expression of a novel antiactivator. Mol Microbiol 87(1): 1-13. 
  5. Ronson, C. W., Hynes, M. F., Ramsay, J. P. and Sullivan, J. T. (2013). Symbiosis Islands. Encyclopedia of Genetics, 2nd edition, 598–600.
  6. Ramsay, J. P. and Salmond, G. P. (2012). Quorum sensing-controlled buoyancy through gas vesicles: Intracellular bacterial microcompartments for environmental adaptation. Commun Integr Biol 5(1): 96-98.
  7. Ramsay, J. P., Williamson, N. R., Spring, D. R. and Salmond, G. P. (2011). A quorum-sensing molecule acts as a morphogen controlling gas vesicle organelle biogenesis and adaptive flotation in an enterobacterium. Proc Natl Acad Sci U S A 108(36): 14932-14937.
  8. Wilf, N. M., Williamson, N. R., Ramsay, J. P., Poulter, S., Bandyra, K. J. and Salmond, G. P. (2011). The RNA chaperone, Hfq, controls two luxR-type regulators and plays a key role in pathogenesis and production of antibiotics in Serratia sp. ATCC 39006. Environ Microbiol 13(10): 2649-2666.
  9. Ramsay, J. P., Sullivan, J. T., Jambari, N., Ortori, C. A., Heeb, S., Williams, P., Barrett, D. A., Lamont, I. L. and Ronson, C. W. (2009). A LuxRI-family regulatory system controls excision and transfer of the Mesorhizobium loti strain R7A symbiosis island by activating expression of two conserved hypothetical genes. Mol Microbiol 73(6): 1141-1155.
  10. Ramsay, J. P., Sullivan, J. T., Stuart, G. S., Lamont, I. L. and Ronson, C. W. (2006). Excision and transfer of the Mesorhizobium loti R7A symbiosis island requires an integrase IntS, a novel recombination directionality factor RdfS, and a putative relaxase RlxS. Mol Microbiol 62(3): 723-734.
  11. Glaser, R. L., Ramsay, J. P. and Morison, I. M. (2006). The imprinted gene and parent-of-origin effect database now includes parental origin of de novo mutations. Nucleic Acids Res 34(Database issue): D29-31.
  12. Morison, I. M., Ramsay, J. P. and Spencer, H. G. (2005). A census of mammalian imprinting. Trends Genet 21(8): 457-465.
Protocols by Joshua P. Ramsay
  1. High-throughput β-galactosidase and β-glucuronidase Assays Using Fluorogenic Substrates