Structure of Mycobacterium tuberculosis FtsZ reveals unexpected, G protein-like conformational switches.Leung, A.K., Lucile White, E., Ross, L.J., Reynolds, R.C., DeVito, J.A., Borhani, D.W.
(2004) J.Mol.Biol. 342: 953-970
- PubMed: 15342249
- DOI: 10.1016/j.jmb.2004.07.061
- Primary Citation of Related Structures:  1RLU, 1RQ7
- PubMed Abstract:
- 2-Alkoxycarbonylaminopyridines: inhibitors of Mycobacterium tuberculosis FtsZ
White, E.L.,Suling, W.J.,Ross, L.J.,Seitz, L.E.,Reynolds, R.C.
(2002) J.ANTIMICROB.CHEMOTHER. 50: 111
- Crystallization of the Mycobacterium tuberculosis cell-division protein FtsZ
Leung, A.K.W.,White, E.L.,Ross, L.J.,Borhani, D.W.
(2000) Acta Crystallogr.,Sect.D 56: 1634
- Slow polymerization of Mycobacterium tuberculosis FtsZ
White, E.L.,Ross, L.J.,Reynolds, R.C.,Seitz, L.E.,Moore, G.D.,Borhani, D.W.
(2000) J.Bacteriol. 182: 4028
- Polymerization of C-Terminally Truncated Mycobacterium tuberculosis FtsZ Is Unlikely to be Physiologically Relevant
Borhani, D.W.,White, E.L.
() TO BE PUBLISHED --: --
We report three crystal structures of the Mycobacterium tuberculosis cell division protein FtsZ, as the citrate, GDP, and GTPgammaS complexes, determined at 1.89, 2.60, and 2.08A resolution. MtbFtsZ crystallized as a tight, laterally oriented dimer d ...
We report three crystal structures of the Mycobacterium tuberculosis cell division protein FtsZ, as the citrate, GDP, and GTPgammaS complexes, determined at 1.89, 2.60, and 2.08A resolution. MtbFtsZ crystallized as a tight, laterally oriented dimer distinct from the longitudinal polymer observed for alphabeta-tubulin. Mutational data on Escherichia coli FtsZ suggest that this dimer interface is important for proper protofilament and "Z-ring" assembly and function. An alpha-to-beta secondary structure conformational switch at the dimer interface is spatially analogous to, and has many of the hallmarks of, the Switch I conformational changes exhibited by G-proteins upon activation. The presence of a gamma-phosphate in the FtsZ active site modulates the conformation of the "tubulin" loop T3 (spatially analogous to the G-protein Switch II); T3 switching upon gamma-phosphate ligation is directly coupled to the alpha-to-beta switch by steric overlap. The dual conformational switches observed here for the first time in an FtsZ link GTP binding and hydrolysis to FtsZ (and tubulin) lateral assembly and Z-ring contraction, and they are suggestive of an underappreciated functional analogy between FtsZ, tubulin and G-proteins.
Drug Discovery Division, Southern Research Institute, Birmingham, AL 35205, USA.