Download MendeleyA molecular switch controls assembly of bacterial focal adhesions.
Attia, B., My, L., Castaing, J.P., Dinet, C., Le Guenno, H., Schmidt, V., Espinosa, L., Anantharaman, V., Aravind, L., Sebban-Kreuzer, C., Nouailler, M., Bornet, O., Viollier, P., Elantak, L., Mignot, T.(2024) Sci Adv 10: eadn2789-eadn2789
- PubMed: 38809974
- DOI: https://doi.org/10.1126/sciadv.adn2789
- Primary Citation of Related Structures:
7Z3C, 7ZOK - PubMed Abstract:
Cell motility universally relies on spatial regulation of focal adhesion complexes (FAs) connecting the substrate to cellular motors. In bacterial FAs, the Adventurous gliding motility machinery (Agl-Glt) assembles at the leading cell pole following a Mutual gliding-motility protein (MglA)-guanosine 5'-triphosphate (GTP) gradient along the cell axis. Here, we show that GltJ, a machinery membrane protein, contains cytosolic motifs binding MglA-GTP and AglZ and recruiting the MreB cytoskeleton to initiate movement toward the lagging cell pole. In addition, MglA-GTP binding triggers a conformational shift in an adjacent GltJ zinc-finger domain, facilitating MglB recruitment near the lagging pole. This prompts GTP hydrolysis by MglA, leading to complex disassembly. The GltJ switch thus serves as a sensor for the MglA-GTP gradient, controlling FA activity spatially.
Organizational Affiliation:
Laboratoire d'Ingénierie des Systèmes Macromoléculaires (LISM), Institut de Microbiologie de la Méditerranée (IMM), CNRS - Aix-Marseille Université UMR7255, 31 Chemin Joseph Aiguier CS70071, 13402 Marseille Cedex 20, France.
