Pavarotti Encodes a Kinesin-like Protein Required to Organize the Central Spindle and Contractile Ring for Cytokinesis

Overview

Journal Genes Dev

Specialty Molecular Biology

Date 1998 May 29

PMID 9585508

Citations 161

Authors

R R Adams

A A TAVARES

A SALZBERG

H J Bellen

D M Glover

Affiliations

Soon will be listed here.

Abstract

Mutations in the Drosophila gene pavarotti result in the formation of abnormally large cells in the embryonic nervous system. In mitotic cycle 16, cells of pav mutant embryos undergo normal anaphase but then develop an abnormal telophase spindle and fail to undertake cytokinesis. We show that the septin Peanut, actin, and the actin-associated protein Anillin, do not become correctly localized in pav mutants. pav encodes a kinesin-like protein, PAV-KLP, related to the mammalian MKLP-1. In cellularized embryos, the protein is localized to centrosomes early in mitosis, and to the midbody region of the spindle in late anaphase and telophase. We show that Polo kinase associates with PAV-KLP with which it shows an overlapping pattern of subcellular localization during the mitotic cycle and this distribution is disrupted in pav mutants. We suggest that PAV-KLP is required both to establish the structure of the telophase spindle to provide a framework for the assembly of the contractile ring, and to mobilize mitotic regulator proteins.

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