Our Project


    White nose syndrome is caused by the fungus Pseudogymnoascus destructans, and affects two bat species in Michigan, tricolored and northern long-eared bats. The fungus infects bats during their hibernation, causing the collagen in their noses to slowly degrade due to proteolytic enzymes produced by the fungus1. This causes the bats to awaken from hibernation prematurely, which results in them becoming lethargic with no resources to sustain life and die. There is currently no widespread treatment to prevent P. destructans infections in bats. (Citation)

    It has been shown that collagen degeneration is due to serine proteases produced by the fungus1. We aim to engineer E. coli that secrete a serine protease inhibitor to prevent collagen degradation. This could be deployed in caves, perhaps as a spray, which would increase bat survival.

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References


1.O'Donoghue AJ, Knudsen GM, Beekman C, Perry JA, Johnson AD, DeRisi JL, Craik CS, Bennett RJ. Destructin-1 is a collagen-degrading endopeptidase secreted by Pseudogymnoascus destructans, the causative agent of white-nose syndrome. Proc Natl Acad Sci U S A. 2015 Jun 16;112(24):7478-83. doi: 10.1073/pnas.1507082112. Epub 2015 May 5. Erratum in: Proc Natl Acad Sci U S A. 2015 Jun 16;112(24):E3152. doi: 10.1073/pnas.1509071112. PMID: 25944934; PMCID: PMC4475985.

2.Micalizzi EW, Smith ML. Volatile organic compounds kill the white-nose syndrome fungus, Pseudogymnoascus destructans, in hibernaculum sediment. Can J Microbiol. 2020 Oct;66(10):593-599. doi: 10.1139/cjm-2020-0071. Epub 2020 Jun 2. PMID: 32485113.

3.Sun Z, Lu W, Jiang A, Chen J, Tang F, Liu JN. Expression, purification and characterization of aprotinin and a human analogue of aprotinin. Protein Expr Purif. 2009 Jun;65(2):238-43. doi: 10.1016/j.pep.2008.12.010. Epub 2008 Dec 27. PMID: 19152836.

4.Marks CB, Vasser M, Ng P, Henzel W, Anderson S. Production of native, correctly folded bovine pancreatic trypsin inhibitor by Escherichia coli. J Biol Chem. 1986 Jun 5;261(16):7115-8. PMID: 2423515.

5.Reeder SM, Palmer JM, Prokkola JM, Lilley TM, Reeder DM, Field KA. Pseudogymnoascus destructans transcriptome changes during white-nose syndrome infections. Virulence. 2017 Nov 17;8(8):1695-1707. doi: 10.1080/21505594.2017.1342910. Epub 2017 Jul 13. PMID: 28614673; PMCID: PMC5810475.