8h1o
Cryo-EM structure of KpFtsZ-monobody double helical tubeCryo-EM structure of KpFtsZ-monobody double helical tube
Structural highlights
FunctionW9BCK7_KLEPN Essential cell division protein that forms a contractile ring structure (Z ring) at the future cell division site. The regulation of the ring assembly controls the timing and the location of cell division. One of the functions of the FtsZ ring is to recruit other cell division proteins to the septum to produce a new cell wall between the dividing cells. Binds GTP and shows GTPase activity.[HAMAP-Rule:MF_00909][RuleBase:RU000631] Publication Abstract from PubMedFtsZ polymerizes into protofilaments to form the Z-ring that acts as a scaffold for accessory proteins during cell division. Structures of FtsZ have been previously solved, but detailed mechanistic insights are lacking. Here, we determine the cryoEM structure of a single protofilament of FtsZ from Klebsiella pneumoniae (KpFtsZ) in a polymerization-preferred conformation. We also develop a monobody (Mb) that binds to KpFtsZ and FtsZ from Escherichia coli without affecting their GTPase activity. Crystal structures of the FtsZ-Mb complexes reveal the Mb binding mode, while addition of Mb in vivo inhibits cell division. A cryoEM structure of a double-helical tube of KpFtsZ-Mb at 2.7 A resolution shows two parallel protofilaments. Our present study highlights the physiological roles of the conformational changes of FtsZ in treadmilling that regulate cell division. Structures of a FtsZ single protofilament and a double-helical tube in complex with a monobody.,Fujita J, Amesaka H, Yoshizawa T, Hibino K, Kamimura N, Kuroda N, Konishi T, Kato Y, Hara M, Inoue T, Namba K, Tanaka SI, Matsumura H Nat Commun. 2023 Jul 10;14(1):4073. doi: 10.1038/s41467-023-39807-5. PMID:37429870[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
|
| ||||||||||||||||||