U1-Research 2F Microscope Lab-Grad-hero
Mike Wedemeyer

Michael Wedemeyer

Graduate Student

Locations

  • Biochemistry

Contact Information

Biography

Mentor: Brian Volkman, PhD
Year Entered MCW: 2015
Previous Education: BS, Biomolecular Engineering, Milwaukee School of Engineering

Research Interests

Chemokines are the body’s most sophisticated system for coordinating the migration of cells and thus represent a critical component in development, the adaptive immune response, and cancer metastasis. The complex protein-protein interface between chemokines and their receptors represents a medically important target for research and drug development, but the selectivity in the network of over 140 chemokine-GPCR interactions remains poorly understood. My interests reflect the facets of my research into chemokine selectivity, and include structural modeling, GPCR signal transduction, and protein engineering.

Structural Modeling
Through great effort, several groups have solved crystal structures of chemokine-bound receptors. To leverage this information to the benefit of the large chemokine family, I have developed a homology-based modeling protocol. These models are being used to guide and interpret ongoing structure-function studies, and are being applied in docking, in silico mutagenesis, and molecular dynamics experiments.

GPCR Signal Transduction
Chemokine receptors are a subset of class A GPCRs, however their binding partners are much larger than the small molecule or peptide ligands commonly seen in this subfamily. The extracellular interaction with the chemokine is dissimilar to these other ligands, yet downstream interactions are remarkably conserved. I am greatly interested in the mechanisms and microstates involved in converting chemokine binding into G protein activation, and I am investigating residue variance among chemokines at critical positions through mutagenesis and signaling assays.

Protein Engineering

Spatial and temporal control of chemokine signaling will be vital for any translational research involving cell migration. To aide in these studies and to define the molecular basis of chemokine selectivity, orthogonal chemokine tools are being developed through rational mutagenesis and protein chimeras.
 

Publications

Modeling the complete chemokine-receptor interaction.
(Wedemeyer MJ, Mueller BK, Bender BJ, Meiler J, Volkman BF.) Methods Cell Biol. 2019;149:289-314.

Heterogeneous stock rats: a model to study the genetics of despair-like behavior in adolescence. 
(Holl K, He H, Wedemeyer M, Clopton L, Wert S, Meckes JK, Cheng R, Kastner A, Palmer AA, Redei EE, Solberg Woods LC.) Genes Brain Behav. 2018; 17(2):139-148

Design of artificial red blood cells using polymeric hydrogel microcapsules: hydrogel stability improvement and polymer selection. 
(Zhang W, Bissen MJ, Savela ES, Clausen JN, Fredricks SJ, Guo X, Paquin ZR, Dohn RP, Pavelich IJ, Polovchak AL, Wedemeyer MJ, Shilling BE, Dufner EN, O'Donnell AC, Rubio G, Readnour LR, Brown TF, Lee JC, Kaltchev MG, Chen J, Tritt CS) Int J Artif Organs. 2016; 1;39(10):518-523.