Purification of Kinesin from Bovine Brain and Assay of Microtubule-Stimulated ATPase Activity

Mark C. Wagner, K. Kevin Pfister, Scott T. Brady, George S. Bloom

Research output: Contribution to journalArticle

20 Scopus citations


The protocols described here have proved to be an effective method for preparation of kinesin suitable for biochemical, biophysical, and immunological analyses. Beginning with a 1.2-liter cytosolic extract of bovine brain containing ∼24 g of protein, 2 mg of ∼95% pure kinesin can be obtained within 2 days. There are four major enrichment steps, as summarized in Fig. 6 and Table I. Based on quantitative SDS-PAGE, we estimate that these steps result in a purification of more than 300-fold. The ATPase activity in the presence of microtubules is substantial, and the kinetic properties are consistent with cellular levels of ATP (Km ∼0.2 mM) and [figure presented] [table presented] microtubules (apparent Km for activation ∼1.9 μM) in the axon.9 Minor modifications should allow the procedure to be enlarged or reduced in scale, or adapted to the brains of other vertebrate species. The availability of such procedures will greatly facilitate future studies of the cell and molecular biology of kinesin.

Original languageEnglish (US)
Pages (from-to)157-175
Number of pages19
JournalMethods in Enzymology
Issue numberC
StatePublished - Jan 1991
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology

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