The role of kinesin and other soluble factors in organelle movement along microtubules

T. A. Schroer, B. J. Schnapp, T. S. Reese, Michael Sheetz

Research output: Contribution to journalArticle

127 Citations (Scopus)

Abstract

Kinesin is a force-generating ATPase that drives the sliding movement of microtubules on glass coverslips and the movement of plastic beads along microtubules. Although kinesin is suspected to participate in microtubule-based organelle transport, the exact role it plays in this process is unclear. To address this question, we have developed a quantitative assay that allows us to determine the ability of soluble factors to promote organelle movement. Salt-washed organelles from squid axoplasm exhibited a nearly undetectable level of movement on purified microtubules. Their frequency of movement could be increased >20-fold by the addition of a high speed axoplasmic supernatant. Immunoadsorption of kinesin from this supernatant decreased the frequency of organelle movement by more than 70%; organelle movements in both directions were markedly reduced. Surprisingly, antibody purified kinesin did not promote organelle movement either by itself or when it was added back to the kinesin-depleted supernatant. This result suggested that other soluble factors necessary for organelle movement were removed along with kinesin during immunoadsorption of the supernatant. A high level of organelle motor activity was recovered in a high salt eluate of the immunoadsorbent that contained only little kinesin. On the basis of these results we propose that organelle movement on microtubules involves other soluble axoplasmic factors in addition to kinesin.

Original languageEnglish (US)
Pages (from-to)1785-1792
Number of pages8
JournalJournal of Cell Biology
Volume107
Issue number5
DOIs
StatePublished - Jan 1 1988
Externally publishedYes

Fingerprint

Kinesin
Microtubules
Organelles
Salts
Decapodiformes
Immunosorbents
Aptitude
Plastics
Glass
Adenosine Triphosphatases
Motor Activity
Antibodies

ASJC Scopus subject areas

  • Cell Biology

Cite this

The role of kinesin and other soluble factors in organelle movement along microtubules. / Schroer, T. A.; Schnapp, B. J.; Reese, T. S.; Sheetz, Michael.

In: Journal of Cell Biology, Vol. 107, No. 5, 01.01.1988, p. 1785-1792.

Research output: Contribution to journalArticle

Schroer, T. A. ; Schnapp, B. J. ; Reese, T. S. ; Sheetz, Michael. / The role of kinesin and other soluble factors in organelle movement along microtubules. In: Journal of Cell Biology. 1988 ; Vol. 107, No. 5. pp. 1785-1792.
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