Abstract

FtsZ is the bacterial tubulin homolog that forms Z-ring, which is a dynamic ring like structure, at the site of cell division to assemble the divisome and generate constrictive force for septum formation. SepF is the key protein that anchors the constricting Z-ring to the protruding septal membrane in Mycobacterium tuberculosis, via its interaction with the intrinsically disordered C-terminal tail of FtsZ. We characterized the cytosolic component of mycobacterial SepF, and its interaction with cognate FtsZ, using negative stained electron microscopy, small angle X-ray scattering, 90 degree angle light scattering and isothermal titration calorimetry.

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