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Early Zygotic Gene Product Dunk Interacts with Anillin to Regulate Myosin II During Cleavage

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Journal Mol Biol Cell
Date 2023 Jul 26
PMID 37494082
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Abstract

cellularization is a special form of cleavage that converts syncytial embryos into cellular blastoderms by partitioning the peripherally localized nuclei into individual cells. An early event in cellularization is the recruitment of nonmuscle myosin II ("myosin") to the leading edge of cleavage furrows, where myosin forms an interconnected basal array before reorganizing into individual cytokinetic rings. The initial recruitment and organization of basal myosin are regulated by a cellularization-specific gene, , but the underlying mechanism is unclear. Through a genome-wide yeast two-hybrid screen, we identified anillin (Scraps in ), a conserved scaffolding protein in cytokinesis, as the primary binding partner of Dunk. Dunk colocalizes with anillin and regulates its cortical localization during the formation of cleavage furrows, while the localization of Dunk is independent of anillin. Furthermore, Dunk genetically interacts with anillin to regulate the basal myosin array during cellularization. Similar to Dunk, anillin colocalizes with myosin since the very early stage of cellularization and is required for myosin retention at the basal array, before the well-documented function of anillin in regulating cytokinetic ring assembly. Based on these results, we propose that Dunk regulates myosin recruitment and spatial organization during early cellularization by interacting with and regulating anillin.

References
1.
Mason F, Xie S, Vasquez C, Tworoger M, Martin A . RhoA GTPase inhibition organizes contraction during epithelial morphogenesis. J Cell Biol. 2016; 214(5):603-17. PMC: 5004446. DOI: 10.1083/jcb.201603077. View

2.
Sokac A, Biel N, De Renzis S . Membrane-actin interactions in morphogenesis: Lessons learned from Drosophila cellularization. Semin Cell Dev Biol. 2022; 133:107-122. PMC: 9532467. DOI: 10.1016/j.semcdb.2022.03.028. View

3.
Schweisguth F, Lepesant J, Vincent A . The serendipity alpha gene encodes a membrane-associated protein required for the cellularization of the Drosophila embryo. Genes Dev. 1990; 4(6):922-31. DOI: 10.1101/gad.4.6.922. View

4.
Afshar K, Stuart B, Wasserman S . Functional analysis of the Drosophila diaphanous FH protein in early embryonic development. Development. 2000; 127(9):1887-97. DOI: 10.1242/dev.127.9.1887. View

5.
Martin A, Kaschube M, Wieschaus E . Pulsed contractions of an actin-myosin network drive apical constriction. Nature. 2008; 457(7228):495-9. PMC: 2822715. DOI: 10.1038/nature07522. View