论文
论文标题：Symmetry breaking in the female germline cyst
作者：D. Nashchekin, L. Busby, M. Jakobs, I. Squires, D. St. Johnston
期刊：Science
发表时间：2021/11/12
数字识别码：10.1126/science.abj3125
摘要：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 (MT) 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 MTs in the cell with the most fusome material. Our data suggest that this weak asymmetry is amplified by Dynein-dependent transport of Patronin-stabilized MTs. This forms a polarized MT 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.
在哺乳动物和果蝇中，雌性多细胞雌性生殖细胞包囊（Female germline cyst）中只有一个细胞会成为卵母细胞，但是这颗卵母细胞是如何打破对称性从中脱颖而出的还不得而知。为了揭开这一问题的答案，英国剑桥大学D. St. Johnston研究组与D. Nashchekin（第一作者）合作在Science发文题为Symmetry breaking in the female germline cyst，发现微管负极稳定蛋白Patronin/CAMSAP通过标记果蝇中的卵母细胞，促使生殖细胞打破对称性从而特化形成卵母细胞的具体分子机制。
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