Essential roles of KIF4 and its binding partner PRC1 in organized central spindle midzone formation.

ABSTRACT: A number of proteins accumulate in the anaphase spindle midzone, but the interaction and precise role of these proteins in midzone organization remain obscure. Here, we found that the microtubule-bundling protein PRC1 bound separately to the three motor proteins, KIF4, MKLP1 and CENP-E, but not to the chromosomal passenger proteins. In KIF4-deficient cells, the central spindle was disorganized, and all midzone-associated proteins including PRC1 failed to concentrate at the midline, instead being dispersed along the loosened microtubule bundles of the central spindle. This suggests that KIF4 is essential for the organization of central spindles and for midzone formation. In PRC1-deficient cells, no midzone was formed, KIF4 and CENP-E did not localize to the disconnected half-spindle, and MK

SUBMITTER: Kurasawa Y 

PROVIDER: S-EPMC514520 | biostudies-literature | 2004 Aug

REPOSITORIES: biostudies-literature