Mycobacterium tuberculosis cell membrane (Mtb cell membrane)

The Mycobacterium tuberculosis (Mtb) cell membrane is a fundamental phospholipid bilayer that serves as the innermost boundary of the bacterial cell envelope, separating the cytoplasm from the periplasmic space and the complex outer cell wall (Jackson, 2014). It is a highly specialized and dynamic structure that acts as a metabolic hub, housing essential machinery for bioenergetics, including the electron transport chain and the ATP synthase complex (Cook et al., 2014). The membrane is also responsible for the regulated transport of ions, nutrients, and effector proteins via specialized transporters such as the MmpL family (Tahlan et al., 2012). As a therapeutic target, the Mtb cell membrane is critical because its disruption or the inhibition of its associated proteins can lead to rapid bacterial death in both replicating and non-replicating states (Andries et al., 2005). Drugs like bedaquiline specifically target membrane-bound ATP synthase, while others like pyrazinamide are thought to collapse the membrane potential, making the membrane a cornerstone of modern anti-tuberculosis drug development (Zhang et al., 2003). Furthermore, the unique lipid composition of the mycobacterial membrane provides a selective barrier that contributes to the pathogen's intrinsic resistance to many standard antibiotics (Nikaido, 2003).

Other names

Mtb plasma membraneMtb cytoplasmic membraneMtb inner membrane

Inhibition of membrane-bound ATP synthase (Andries et al., 2005), disruption of the proton motive force and membrane potential (Zhang et al., 2003), inhibition of transmembrane transporters such as MmpL3 (Tahlan et al., 2012), and interference with the respiratory electron transport chain (Cook et al., 2014).