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    Determining the structural dynamics of MMP-3/TIMP complex from NMR relaxation

    Gieselman, Nicholas
    Bhaskaran, Rajagopalan
    Van Doren, Steven
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    [PDF] DeterminingStructuralDynamicsMMP3.pdf (18.67Kb)
    Date
    2008
    Contributor
    University of Missouri-Columbia. Office of Undergraduate Research
    Format
    Presentation
    Metadata
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    Abstract
    MMP-3, or Stromelysin 1, is an proteolytic enzyme of the extracellular matrix that is involved in the repair of wounds. It is implicated in inflammation and cartilage damage and inflammation in rheumatoid arthritis and damage to the blood-brain barrier immediately after stroke. While a natural inhibitor does exist, it stops all processes, good and bad. MMP-3 must be selectively inhibited, and for this reason, we must understand how Tissue Inhibitor of Metalloproteinases (TIMP) inhibits MMP-3. Using NMR spectroscopy, the chemical shift of the 15N and 1H atoms, as well as the 15N NMR relaxation data (R1;, R&sub2;, and heteronuclear NOE) of the MMP-3 protein was recorded. Using NMRpipe, this data was converted into a spectrum, showing the contoured peaks. Using the NMR program Sparky, the relaxation data were fitted, and converted into a relaxation rate constant for each residue. For more accurate results, the data was filtered twice: coarse and fine. After coarse filtering, it was realized that the R2 data were collected at different a frequency than the R1 data. This renders the data less compatible. Preparation of new samples to be done at the correct frequencies will be completed sometime in the near future. Once this is accomplished, the new relaxation data for R2 can be calculated, and the dynamics of the MMP-3/TIMP complex can be calculated accurately.
    URI
    http://hdl.handle.net/10355/1861
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