Closing of the nucleotide pocket of kinesin-family motors upon binding to microtubules

Nariman Naber, Todd J. Minehardt, Sarah Rice, Xiaoru Chen, Jean Grammer, Marija Matuska, Ronald D. Vale, Peter A. Kollman, Roberto Car, Ralph G. Yount, Roger Cooke, Edward Pate

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

We have used adenosine diphosphate analogs containing electron paramagnetic resonance (EPR) spin moieties and EPR spectroscopy to show that the nucleotide-binding site of kinesin-family motors closes when the motor-diphosphate complex binds to microtubules. Structural analyses demonstrate that a domain movement in the switch 1 region at the nucleotide site, homologous to domain movements in the switch 1 region in the G proteins [heterotrimeric guanine nucleotide-binding proteins], explains the EPR data. The switch movement primes the motor both for the free energy-yielding nucleotide hydrolysis reaction and for subsequent conformational changes that are crucial for the generation of force and directed motion along the microtubule.

Original languageEnglish (US)
Pages (from-to)798-801
Number of pages4
JournalScience
Volume300
Issue number5620
DOIs
StatePublished - May 2 2003

All Science Journal Classification (ASJC) codes

  • General

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