Stephen Juris
Associate Professor
Department of Biology
Department of Chemistry & Biochemistry
Biochemistry, Molecular Mechanisms, Microbial Pathogenesis
Biosciences 3104
989-774-3257


Dr. Juris is a professor of Biology/Chemistry & Biochemistry at Central Michigan University

Education

  • B.S., Boston College, 1996
  • Ph.D., University of Michigan, 2002
  • Postdoc., Harvard Medical School, 2002-2006

Teaching Areas

  • Basic Biology
  • Cell Biology
  • Biochemistry
  • Immunology

Research Fields

  • Molecular Mechanisms of Microbial Pathogenesis

Current Research Projects

My research interests are focused on the biochemical and cell biological action of bacterial toxins that target the actin cytoskeleton. Pathogenic bacteria often secrete toxins that target the cytoskeleton in order to subvert the immune defenses of their host. These toxins must gain access to the cytosol of target cells via transport across a biological membrane in order to carry out their function. Once ‚Äčinside the target cell, these bacterial toxins carry out a multitude of different activities including proteolysis, phosphorylation, or other post-translational modification of host proteins in order to down-regulate signaling cascades connected with the actin cytoskeleton in order to inhibit innate immune processes including phagocytosis and chemotaxis. My goals are to understand the transport of the actin-targeting toxin MARTX from Vibrio cholerae across cellular membranes and its subsequent action on the actin cytoskeleton within target cells. My lab utilizes biochemistry, cell biology, biophysics and genetics to study these questions.

Research is currently being conducted in my lab to describe pollen grain diversity across the Brassicaceae. Trends in pollen evolution will be examined relative to recent advances in phylogenetic reconstruction and tribal classifications within the family. Pollen morphological data from scanning electron and light microscopy will be used to examine pollen evolutionary patterns and correlated floral evolution across the Brassicaceae.

Publications

  • Yajing Ji, Austin Bowersock, Alec R. Badour, Neeraj Vij, Stephen J. Juris, David E. Ash, and Dillip K. Mohanty. 2016. Dichotomous Effects of Isomeric Secondary Amines Containing an Aromatic Nitrile and Nitro Group on Human Aortic Smooth Muscle Cells via Inhibition of Cystathionine-g-lyase. Biochimie. 133:103-111.
  • Stephen J. Juris, Anja Mueller, Brian T. L. Smith, Samantha Johnston, Robert Walker, and Robert D. Kross. 2011. Biodegradable Polysaccharide Gels for Skin Scaffolds. Journal of Biomaterials and Nanobiotechnology. 2: 216-225.
  • Hughes, M.A., D.L. Burns, S.J. Juris, W.J. Tang, K.H. Clement, L.J. Eaton, C.D. Kelly-Cirino, M.L. McKee, B.S. Powell, B.L. Bishop, T.L. Rudge, N. Shine, A. Verma, M.S. Willis, and S.A. Morse. 2009. The case for developing consensus standards for research in microbial pathogenesis: Bacillus anthracis toxins as an example. Infection and Immunity 77: 4182-4186.
  • Basilio, D., S.J. Juris, R.J. Collier, and A. Finkelstein. 2009. Evidence for a proton-protein symport mechanism in the anthrax toxin channel. Journal of General Physiology 133:307-314.
  • Juris, S.J., R.A. Melnyk, R.E. Bolcome III, J. Chan, and R.J. Collier. 2007. Crosslinked forms of the isolated N-terminal domain of the lethal factor are potent inhibitors of anthrax toxin. Infection and Immunity 75:5052-5058.
  • Juris, S.J., K. Shah, K. Shokat, J.E. Dixon, and P.O. Vacratsis. 2006. Identification of otubain 1 as a novel substrate for the Yersinia protein kinase using chemical genetics and mass spectrometry. FEBS Letters 580:179-183.
  • Krantz, B.A., R.A. Melnyk, S. Zhang, S.J. Juris, D.B. Lacy, Z. Wu, A. Finkelstein, and R.J. Collier. 2005. A phenylalanine clamp catalyzes protein translocation through the anthrax toxin pore. Science 309:777-781.