Crystal structures of the cell‐division protein FtsZ from Klebsiella pneumoniae and Escherichia coli. Issue 2 (10th February 2020)

• Record Type: Journal Article
• Authors: Yoshizawa, Takuya; Fujita, Junso; Terakado, Haruna; Ozawa, Mayuki; Kuroda, Natsuko; Tanaka, Shun-ichi; Uehara, Ryo; Matsumura, Hiroyoshi
• Is Part Of: Acta crystallographica. Volume 76:Issue 2(2020:Feb.)
• Page Start: 86
• Page End: 93
• Publication Date: 2020-02-10
• Subjects: cell division -- FtsZ -- Escherichia coli -- Klebsiella pneumoniae; Crystallography -- Periodicals; Crystals -- Periodicals; 548
• DOI: 10.1107/S2053230X2000076X
• Languages: English
• ISSNs: 2053-230X

Abstract

Abstract : In the presence of GTP, the tubulin‐like GTPase FtsZ polymerizes into filamentous structures, which are key to cell division. The enzymatic domains of FtsZ from Klebsiella pneumoniae (KpFtsZ) and Escherichia coli (EcFtsZ) formed straight protofilaments in crystals, and both structures adopted relaxed conformations. The T3 loop adopted a unique open conformation in KpFtsZ, while the T3 loop of EcFtsZ was partially disordered. Abstract : FtsZ, a tubulin‐like GTPase, is essential for bacterial cell division. In the presence of GTP, FtsZ polymerizes into filamentous structures, which are key to generating force in cell division. However, the structural basis for the molecular mechanism underlying FtsZ function remains to be elucidated. In this study, crystal structures of the enzymatic domains of FtsZ from Klebsiella pneumoniae (KpFtsZ) and Escherichia coli (EcFtsZ) were determined at 1.75 and 2.50 Å resolution, respectively. Both FtsZs form straight protofilaments in the crystals, and the two structures adopted relaxed (R) conformations. The T3 loop, which is involved in GTP/GDP binding and FtsZ assembly/disassembly, adopted a unique open conformation in KpFtsZ, while the T3 loop of EcFtsZ was partially disordered. The crystal structure of EcFtsZ can explain the results from previous functional analyses using EcFtsZ mutants.