RRC ID 29064
Author Lakshmikanth GS, Warrick HM, Spudich JA.
Title A mitotic kinesin-like protein required for normal karyokinesis, myosin localization to the furrow, and cytokinesis in Dictyostelium.
Journal Proc Natl Acad Sci U S A
Abstract Dictyostelium mitotic kinesin Kif12 is required for cytokinesis. Myosin II localization to the cleavage furrow is severely depressed in Kif12-null (Deltakif12) cells, which accounts in part for the cytokinesis failure. Myosin II-null cells, however, undergo mitosis-coupled cytokinesis when adhering to a surface, whereas the Deltakif12 cells cannot. During mitosis, the rate of change of internuclear separation in Deltakif12 cells is reduced compared with wild-type cells, indicating multiple roles of this molecular motor during mitosis and cytokinesis. GFP-Kif12, which rescues wild-type behavior when expressed in the Deltakif12 strain, is concentrated in the nucleus in interphase cells, translocates to the cytoplasm at the onset of mitosis, appears in the centrosomes and spindle, and later is concentrated in the spindle midbody. Given these results, we hypothesize a mechanism for myosin II translocation to the furrow to set up the contractile ring.
Volume 101(47)
Pages 16519-24
Published 2004-11-23
DOI 10.1073/pnas.0407304101
PII 0407304101
PMID 15546981
PMC PMC528903
MeSH Animals Cell Cycle Cell Nucleus Division Cytokinesis Dictyostelium / cytology* Dictyostelium / genetics Dictyostelium / metabolism* Gene Targeting Genes, Protozoan Genetic Complementation Test Green Fluorescent Proteins / genetics Green Fluorescent Proteins / metabolism Kinesins / genetics Kinesins / metabolism Mitosis Models, Biological Myosins / genetics Myosins / metabolism Protozoan Proteins / genetics Protozoan Proteins / metabolism Recombinant Fusion Proteins / genetics Recombinant Fusion Proteins / metabolism
IF 9.412
Times Cited 19
Cellular slime molds S00413