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The chromosomal passenger complex (CPC), containing Aurora B kinase, Inner Centromere Protein, Survivin, and Borealin, regulates chromosome condensation and interaction between kinetochores and microtubules at metaphase, then relocalizes to midzone microtubules at anaphase and regulates central spindle organization and cytokinesis. However, the precise role(s) played by the CPC in anaphase have been obscured by its prior functions in metaphase. Here we identify a missense allele of Drosophila Survivin that allows CPC localization and function during metaphase but not cytokinesis. Analysis of mutant cells showed that Survivin is essential to target the CPC and the mitotic kinesin-like protein 1 orthologue Pavarotti (Pav) to the central spindle and equatorial cell cortex during anaphase in both larval neuroblasts and spermatocytes. Survivin also enabled localization of Polo kinase and Rho at the equatorial cortex in spermatocytes, critical for contractile ring assembly. In neuroblasts, in contrast, Survivin function was not required for localization of Rho, Polo, or Myosin II to a broad equatorial cortical band but was required for Myosin II to transition to a compact, fully constricted ring. Analysis of this “separation-of-function” allele demonstrates the direct role of Survivin and the CPC in cytokinesis and highlights striking differences in regulation of cytokinesis in different cell systems.
Male, INNER CENTROMERE, Survivin, CHROMOSOMAL PASSENGER COMPLEX, Video Recording, Spindle Apparatus, CONTRACTILE RING, Chromosomes, Inhibitor of Apoptosis Proteins, Species Specificity, Spermatocytes, Chromosome Segregation, Animals, Drosophila Proteins, AURORA-B KINASE, Kinetochores, Alleles, Cytokinesis, CENTRAL-SPINDLE, CENTROMERE PROTEIN INCENP, Articles, Drosophila melanogaster, Microscopy, Fluorescence, DROSOPHILA-MELANOGASTER, CLEAVAGE FURROW, Larva, Mutation, HISTONE H3 PHOSPHORYLATION, MEIOTIC CYTOKINESIS, Anaphase, Microtubule-Associated Proteins
Male, INNER CENTROMERE, Survivin, CHROMOSOMAL PASSENGER COMPLEX, Video Recording, Spindle Apparatus, CONTRACTILE RING, Chromosomes, Inhibitor of Apoptosis Proteins, Species Specificity, Spermatocytes, Chromosome Segregation, Animals, Drosophila Proteins, AURORA-B KINASE, Kinetochores, Alleles, Cytokinesis, CENTRAL-SPINDLE, CENTROMERE PROTEIN INCENP, Articles, Drosophila melanogaster, Microscopy, Fluorescence, DROSOPHILA-MELANOGASTER, CLEAVAGE FURROW, Larva, Mutation, HISTONE H3 PHOSPHORYLATION, MEIOTIC CYTOKINESIS, Anaphase, Microtubule-Associated Proteins
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 31 | |
popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |