
pmid: 22197245
Cell division is achieved by a plasma membrane furrow that must ingress between the segregating chromosomes during anaphase [1-3]. The force that drives furrow ingression is generated by the actomyosin cytoskeleton, which is linked to the membrane by an as yet undefined molecular mechanism. A key component of the membrane furrow is anillin. Upon targeting to the furrow through its pleckstrin homology (PH) domain, anillin acts as a scaffold linking the actomyosin and septin cytoskeletons to maintain furrow stability (reviewed in [4, 5]). We report that the PH domain of anillin interacts with phosphatidylinositol phosphate lipids (PIPs), including PI(4,5)P(2), which is enriched in the furrow. Reduction of cellular PI(4,5)P(2) or mutations in the PH domain of anillin that specifically disrupt the interaction with PI(4,5)P(2), interfere with the localization of anillin to the furrow. Reduced expression of anillin disrupts symmetric furrow ingression that can be restored by targeting ectopically expressed anillin to the furrow using an alternate PI(4,5)P(2) binding module, a condition where the septin cytoskeleton is not recruited to the plasma membrane. These data demonstrate that the anillin PH domain has two functions: targeting anillin to the furrow by binding to PI(4,5)P(2) to maintain furrow organization and recruiting septins to the furrow.
Phosphatidylinositol 4,5-Diphosphate, Binding Sites, Agricultural and Biological Sciences(all), Biochemistry, Genetics and Molecular Biology(all), Cell Membrane, Green Fluorescent Proteins, Blood Proteins, Phosphoproteins, Actins, Protein Structure, Tertiary, Membrane Lipids, Contractile Proteins, Phosphatidylinositol Phosphates, Mutation, Animals, Drosophila Proteins, Humans, Septins, Cytokinesis, HeLa Cells
Phosphatidylinositol 4,5-Diphosphate, Binding Sites, Agricultural and Biological Sciences(all), Biochemistry, Genetics and Molecular Biology(all), Cell Membrane, Green Fluorescent Proteins, Blood Proteins, Phosphoproteins, Actins, Protein Structure, Tertiary, Membrane Lipids, Contractile Proteins, Phosphatidylinositol Phosphates, Mutation, Animals, Drosophila Proteins, Humans, Septins, Cytokinesis, HeLa Cells
| selected citations These citations are derived from selected sources. 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). | 109 | |
| 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). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
