Application of nanotags and nanobodies for live cell single-molecule imaging of the Z-ring inEscherichia coli

Abstract

AbstractUnderstanding where proteins are localized in a bacterial cell is essential for understanding their function and regulation. This is particularly important for proteins that are involved in cell division, which localize at the division septum and assemble into highly regulated complexes. Current knowledge of these complexes has been greatly facilitated by super-resolution imaging using fluorescent protein fusions. Herein we demonstrate with FtsZ that single-molecule PALM images can be obtainedin-vivousing a genetically fused nanotag (ALFA) and a corresponding nanobody fused to mEos3.2. The methodology presented is applicable to other bacterial proteins.