Structural changes accompanying GTP hydrolysis in microtubules: information from a slowly hydrolyzable analogue guanylyl-(alpha,beta)-methylene-diphosphonate.
1995; Rockefeller University Press; Volume: 128; Issue: 1 Linguagem: Inglês
10.1083/jcb.128.1.117
ISSN1540-8140
AutoresAnthony A. Hyman, Denis Chrétien, Isabelle Arnal, Richard H. Wade,
Tópico(s)Protist diversity and phylogeny
ResumoWe have used cryoelectron microscopy to try to understand the structural basis for the role of GTP hydrolysis in destabilizing the microtubule lattice. We have measured a structural difference introduced into microtubules by replacing GTP with guanylyl-(alpha,beta)-methylene-diphosphonate (GMPCPP). In a stable GMPCPP microtubule lattice, the moiré patterns change and the tubulin subunits increase in size by 1.5 A. This information provides a clue to the role of hydrolysis in inducing the structural change at the end of a microtubule during the transition from a growing to a shrinking phase.
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