The Drosophila claret segregation protein is a minus-end directed motor molecule.

Published

Journal Article

A product encoded at the claret locus in Drosophila is needed for normal chromosome segregation in meiosis in females and in early mitotic divisions of the embryo. The predicted amino-acid sequence of the segregation protein was shown recently to be strikingly similar to Drosophila kinesin heavy chain. We have expressed the claret segregation protein in bacteria and have found that the bacterially expressed protein has motor activity in vitro with several novel features. The claret motor is slow (4 microns min-1), unlike either kinesin or dyneins. It has the directionality, the ability to generate torque and the sensitivity to inhibitors reported previously for dyneins. The finding of minus-end directed motor activity for a protein with sequence similarity to kinesin suggests that the dynein and kinesin motor domains are ancestrally related. The minus-end directed motor activity of the claret motor is consistent with a role for this protein in producing chromosome movement along spindle microtubules during prometaphase and/or anaphase.

Full Text

Duke Authors

Cited Authors

  • Walker, RA; Salmon, ED; Endow, SA

Published Date

  • October 1990

Published In

Volume / Issue

  • 347 / 6295

Start / End Page

  • 780 - 782

PubMed ID

  • 2146510

Pubmed Central ID

  • 2146510

Electronic International Standard Serial Number (EISSN)

  • 1476-4687

International Standard Serial Number (ISSN)

  • 0028-0836

Digital Object Identifier (DOI)

  • 10.1038/347780a0

Language

  • eng