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Science 2 July 2004:
Vol. 305. no. 5680, pp. 93 - 96
DOI: 10.1126/science.1097775
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Reports

Mitotic Golgi Partitioning Is Driven by the Membrane-Fissioning Protein CtBP3/BARS

Cristina Hidalgo Carcedo,1 Matteo Bonazzi,2 Stefania Spanò,1 Gabriele Turacchio,2 Antonino Colanzi,1 Alberto Luini,2* Daniela Corda1*

Organelle inheritance is an essential feature of all eukaryotic cells. As with other organelles, the Golgi complex partitions between daughter cells through the fission of its membranes into numerous tubulovesicular fragments. We found that the protein CtBP3/BARS (BARS) was responsible for driving the fission of Golgi membranes during mitosis in vivo. Moreover, by in vitro analysis, we identified two stages of this Golgi fragmentation process: disassembly of the Golgi stacks into a tubular network, and BARS-dependent fission of these tubules. Finally, this BARS-induced fission of Golgi membranes controlled the G2-to-prophase transition of the cell cycle, and hence cell division.

1 Laboratory of Cell Regulation, Department of Cell Biology and Oncology, Consorzio Mario Negri Sud, Via Nazionale, 66030 Santa Maria Imbaro (Chieti), Italy.
2 Laboratory of Membrane Traffic, Department of Cell Biology and Oncology, Consorzio Mario Negri Sud, Via Nazionale, 66030 Santa Maria Imbaro (Chieti), Italy.

* To whom correspondence should be addressed. E-mail: luini{at}dcbo.negrisud.it, corda{at}negrisud.it

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