Symmetry breaking in the female germline cyst.
Symmetry breaking in the female germline cyst.
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DOI:
10.1126/science.abj3125
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发表时间:
2021-11-12
期刊:
影响因子:
--
通讯作者:
St Johnston D
中科院分区:
文献类型:
--
作者:
Nashchekin D;Busby L;Jakobs M;Squires I;St Johnston D
In mammals and flies, only one cell in a multicellular female germline cyst becomes an oocyte, but how symmetry is broken to select the oocyte is unknown. Here we show that the microtubule minus end-stabilizing protein, Patronin/CAMSAP marks the future Drosophila oocyte and is required for oocyte specification. The spectraplakin, Shot, recruits Patronin to the fusome, a branched structure extending into all cyst cells. Patronin stabilizes more microtubules in the cell with most fusome. Our data suggest that this weak asymmetry is amplified by Dynein-dependent transport of Patronin-stabilized microtubules. This forms a polarized microtubule network, along which Dynein transports oocyte determinants into the presumptive oocyte. Thus, Patronin amplifies a weak fusome anisotropy to break symmetry and select one cell to become the oocyte.
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DOI:
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发表时间:
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期刊:
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影响因子:
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