The early application of dynamic light scattering (DLS) in protein crystallography marked an important advancement in understanding protein solutions prior to crystallization. Initially, DLS was employed to assess the homogeneity and size distribution of protein molecules in solution, which are critical parameters influencing potential “crystallizability” and subsequent crystal quality.
In these early studies, researchers used DLS to detect and quantify aggregates, impurities, or multiple populations of particles that could hinder successful crystallization. By measuring fluctuations in scattered light intensity caused by Brownian motion, they could determine the hydrodynamic radius of proteins and identify conditions that promote monodispersity—an essential factor for obtaining well-ordered crystals.
Furthermore, early applications of DLS provided insights into protein stability and conformational states, helping scientists optimize buffer conditions, pH, and ionic strength. This pre-crystallization characterization reduced trial-and-error efforts and increased the likelihood of producing high-quality crystals suitable for x-ray diffraction studies.
Overall, the use of DLS in protein crystallography serves as a rapid, non-invasive tool to evaluate sample quality, guide experimental conditions, and improve the efficiency of the crystallization process.
Contact us today to discuss our NanoBrook series of dynamic light scattering instruments used to determine molecular/particle size, distribution and aggregation/agglomeration state.