1W5B

FtsZ dimer, GTP soak (M. jannaschii)

Summary for 1W5B

• Entry DOI: 10.2210/pdb1w5b/pdb
• Related: 1FSZ 1W58 1W59 1W5A 1W5E 1W5F
• Descriptor: CELL DIVISION PROTEIN FTSZ HOMOLOG 1, GUANOSINE-5'-TRIPHOSPHATE (3 entities in total)
• Functional Keywords: cell division, cell division protein, cell-division protein, ftsz, gtp-binding, multigene family, septation, tubulin, filament, z-ring, gtpase
• Biological source: METHANOCALDOCOCCUS JANNASCHII
• Cellular location: Cytoplasm : Q57816
• Total number of polymer chains: 2
• Total formula weight: 78986.61

Authors

Oliva, M.A.,Cordell, S.C.,Lowe, J. (deposition date: 2004-08-06, release date: 2004-12-01, Last modification date: 2023-12-13)

Primary citation

Oliva, M.A.,Cordell, S.C.,Lowe, J.
Structural Insights Into Ftsz Protofilament Formation
Nat.Struct.Mol.Biol., 11:1243-, 2004

PubMed Abstract: The prokaryotic tubulin homolog FtsZ polymerizes into a ring structure essential for bacterial cell division. We have used refolded FtsZ to crystallize a tubulin-like protofilament. The N- and C-terminal domains of two consecutive subunits in the filament assemble to form the GTPase site, with the C-terminal domain providing water-polarizing residues. A domain-swapped structure of FtsZ and biochemical data on purified N- and C-terminal domains show that they are independent. This leads to a model of how FtsZ and tubulin polymerization evolved by fusing two domains. In polymerized tubulin, the nucleotide-binding pocket is occluded, which leads to nucleotide exchange being the rate-limiting step and to dynamic instability. In our FtsZ filament structure the nucleotide is exchangeable, explaining why, in this filament, nucleotide hydrolysis is the rate-limiting step during FtsZ polymerization. Furthermore, crystal structures of FtsZ in different nucleotide states reveal notably few differences.

PubMed: 15558053
DOI: 10.1038/NSMB855

Experimental method

X-RAY DIFFRACTION (2.2 Å)