Potential for the detection of molecular complexes and determination of interaction geometry by 2DIR: application to...

The ability to detect molecular complexes and determine their geometries is crucial to our understanding of all biological phenomena, including protein structures and functions. We recently demonstrated that a novel 2DIR technique, EVV 2DIR spectroscopy, can be used for this purpose. In this paper, we evaluate the potential utility of the method for the analysis of protein composition, structure and function. In order to do this we apply computational tools to a group of selected biological systems, for which our calculated spectra all showed features that can in principle be detected with existing sensitivities. We also investigate the possibility of using our technique to detect and analyse hydrogen-bonded systems through a tyrosine-water model.