Purification of kinesin-related protein complexes from eggs and embryos.

Published

Journal Article

We have developed a biochemical screen for the identification of kinesin-related proteins (KRPs) in their natural host cells and the subsequent purification of these KRPs as native, functional multimeric complexes. The screen involves immunoblotting with pan-kinesin peptide antibodies that recognize several presumptive KRPs in cytosolic extracts; the antibodies have been used so far to monitor the purification of two bona fide kinesin-related motor protein complexes. These two KRPs were purified via AMPPNP-induced microtubule affinity binding, ATP-induced elution from AMPPNP microtubules, gel filtration fractionation, and sucrose density gradient centrifugation. KRP(85/95) from sea urchin (Strongylocentrotus purpuratus) eggs behaves as a heterotrimeric complex of 85-, 95-, and 115-kDa subunits that moves toward the plus ends of microtubule tracks at approximately 0.4 micron/s. KRP(130) from fruitfly (Drosophila melanogaster) embryos behaves as a homotetrameric complex of four 130-kDa subunits that moves toward the plus ends of microtubule tracks at approximately 0.04 micron/s. To our knowledge, KRP(85/95) and KRP(130) are the only KRPs to have been purified from native tissue as functional multimeric motor complexes.

Full Text

Duke Authors

Cited Authors

  • Cole, DG; Scholey, JM

Published Date

  • April 1995

Published In

Volume / Issue

  • 68 / 4 Suppl

Start / End Page

  • 158S - 160S

PubMed ID

  • 7787059

Pubmed Central ID

  • 7787059

International Standard Serial Number (ISSN)

  • 0006-3495

Language

  • eng

Conference Location

  • United States