Global

Molecular Biology Experts

Andrew Marcus

Professor,
Chemistry and Biochemistry Associate Member, IMB
Institute of molecular biology
Afghanistan

Biography

 The Marcus group studies the structure and dynamics of macromolecules in biological environments. These include the diffusive motions and internal structural changes of proteins in membranes and in living cells, as well as the conformational fluctuations of macromolecular machines that interact with and manipulate DNA. To elucidate the conformations of macromolecular complexes, and to monitor their time dependent behavior, we develop and apply linear and nonlinear spectroscopic methods that are sensitive to the electronic couplings between fluorescent chromophore labels. Spectroscopic characterization of exciton-coupled dimer probes, which are attached at specific locations on the macromolecules, allows us to observe functionally important macromolecular conformations. For example, by using fluorescent nucleic acid analogues placed at sites near the forks and junctions of primer-template DNA, we study the effects of protein-DNA interactions on local base-stacking conformation. In collaboration with UofO Prof. Peter von Hippel, we are investigating the mechanisms of polymerase and helicase, two protein-DNA complexes central to gene expression. Extension of our techniques to single molecule fluorescence imaging allows us to observe bio-molecular events in real time.

Research Interest

  Protein dynamics, intracellular transport.

Global Experts from Afghanistan

Global Experts in Subject

Share This Profile
Recent Expert Updates
  • Matthew L Stone
    Matthew L Stone
    pediatrics
    University of Virginia Health System; Charlottesville, VA
    United States of America
  • Dr.   Matthew
    Dr. Matthew
    pediatrics
    University of Virginia Health System; Charlottesville, VA
    United States of America
  • Dr.  L Stone Matthew
    Dr. L Stone Matthew
    pediatrics
    University of Virginia Health System; Charlottesville, VA
    United States of America
  • Dr.  L Stone
    Dr. L Stone
    pediatrics
    University of Virginia Health System; Charlottesville, VA
    United States of America
  • Dr. Matthew L Stone
    Dr. Matthew L Stone
    pediatrics
    University of Virginia Health System; Charlottesville, VA
    United States of America
  • Dr.  R Sameh
    Dr. R Sameh
    pediatrics
    King Abdul Aziz University
    United Arab Emirates
  • Dr.   R Ismail,
    Dr. R Ismail,
    pediatrics
    King Abdul Aziz University
    United Arab Emirates
  • Sameh R Ismail,
    Sameh R Ismail,
    pediatrics
    King Abdul Aziz University
    United Arab Emirates
  • Dr.   Sameh R Ismail,
    Dr. Sameh R Ismail,
    pediatrics
    King Abdul Aziz University
    United Arab Emirates
  • Dr.   William
    Dr. William
    pediatrics
    Maimonides Medical Center
    United States of America