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EC Number
Natural Substrates
Commentary (Nat. Sub.)
GTP-binding proteins from the tubulin family, including alpha,beta-tubulin are key components of the cytoskeleton and play central roles in chromosome segregation and cell division. The nucleotide switch of alpha,beta-tubulin is triggered by GTP hydrolysis and regulates microtubule assembly dynamics. Unassembled tubulin-GTP is in the inactive, curved conformation as in tubulin-GDP rings, and is driven into the straight microtubule conformation by the assembly contacts. Binding of the GTP gamma-phosphate only lowers the free energy difference between the curved and straight forms
enzyme FtsZDr acts as a GTPase exhibiting polymerization/depolymerization dynamics in vitro and FtsZ ring formation in vivo
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