Reference Report

Reference
Citation	Swan, A., Schupbach, T. (2007). The Cdc20 (Fzy)/Cdh1-related protein, Cort, cooperates with Fzy in cyclin destruction and anaphase progression in meiosis I and II in Drosophila. Development 134(5): 891--899. (Export to RIS)
FlyBase ID	FBrf0194687
Publication Type	Research paper
PubMed ID	17251266
PubMed Abstract	Meiosis is a highly specialized cell division that requires significant reorganization of the canonical cell-cycle machinery and the use of meiosis-specific cell-cycle regulators. The anaphase-promoting complex (APC) and a conserved APC adaptor, Cdc20 (also known as Fzy), are required for anaphase progression in mitotic cells. The APC has also been implicated in meiosis, although it is not yet understood how it mediates these non-canonical divisions. Cortex (Cort) is a diverged Fzy homologue that is expressed in the female germline of Drosophila, where it functions with the Cdk1-interacting protein Cks30A to drive anaphase in meiosis II. Here, we show that Cort functions together with the canonical mitotic APC adaptor Fzy to target the three mitotic cyclins (A, B and B3) for destruction in the egg and drive anaphase progression in both meiotic divisions. In addition to controlling cyclin destruction globally in the egg, Cort and Fzy appear to both be required for the local destruction of cyclin B on spindles. We find that cyclin B associates with spindle microtubules throughout meiosis I and meiosis II, and dissociates from the meiotic spindle in anaphase II. Fzy and Cort are required for this loss of cyclin B from the meiotic spindle. Our results lead to a model in which the germline-specific APC(Cort) cooperates with the more general APC(Fzy), both locally on the meiotic spindle and globally in the egg cytoplasm, to target cyclins for destruction and drive progression through the two meiotic divisions.
DOI	10.1242/dev.02784
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Secondary IDs
Language of Publication	English
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Publication Type	Journal
Abbreviation	Development
Title	Development
Publication Year	1987-
ISBN/ISSN	0950-1991
Data from Reference
Alleles (15)
	Cks30A^KO Cks30A^{Scer\UAS.T:Zzzz\FLAG} cort^QW55 cort^RH65 cort^{Scer\UAS.P\T.T:Ivir\HA1} cort^unspecified CycB^{CBTPM.Scer\UAS.P\T.T:Avic\GFP} fzy⁶ fzy⁷ fzy^Scer\UAS.cSa rap^Scer\UAS.cSa Scer\GAL4^en-e16E Scer\GAL4^{nos.UTR.T:Hsim\VP16} Scer\GAL4^ptc-559.1 w^+mC
Constructs (6)
	P{GAL4::VP16-nos.UTR} P{UAS-Cks30A-FLAG} P{UAS-fzr.S} P{UAS-fzy.S} P{UASp-CBTPM-GFP} P{UASp-cort.HA}
Genes (11)
	Cks30A cort CycA CycB CycB3 fzy rap Scer\GAL4 sub T:Ivir\HA1 w
Insertions (2)
	P{en2.4-GAL4}e16E P{GawB}ptc^559.1
Natural transposons (1)
	P-element