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Crystal structures of the cell‐division protein FtsZ from Klebsiella pneumoniae and Escherichia coli
Author(s) -
Yoshizawa Takuya,
Fujita Junso,
Terakado Haruna,
Ozawa Mayuki,
Kuroda Natsuko,
Tanaka Shun-ichi,
Uehara Ryo,
Matsumura Hiroyoshi
Publication year - 2020
Publication title -
acta crystallographica section f
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 37
ISSN - 2053-230X
DOI - 10.1107/s2053230x2000076x
Subject(s) - ftsz , gtpase , escherichia coli , cell division , gtp' , mutant , tubulin , bacterial cell structure , klebsiella pneumoniae , biology , bacterial protein , crystallography , chemistry , microbiology and biotechnology , bacteria , biochemistry , cell , enzyme , genetics , microtubule , gene
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.