The Pyrenoid
The Pyrenoid
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核糖体
DOI：
10.1016/j.cub.2020.02.051
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发表时间：
2020
期刊：
影响因子：
9.2
通讯作者：
Jonikas, Martin
中科院分区：
文献类型：
--
作者：
Wang, Lianyong;Jonikas, Martin
在细胞分裂过程中，类蛋白核是如何遗传的？在衣藻的营养生长过程中，类蛋白核通常通过分裂来分裂；类蛋白核似乎被分裂的叶绿体的收缩裂沟一分为二。然而，在这一事件发生前几分钟，类蛋白核基质的很大一部分溶解在周围的叶绿体中，在叶绿体分裂完成后，这种物质又浓缩回类蛋白核中。在少数情况下，类蛋白核分裂失败，其中一个子叶绿体没有继承类蛋白核，它仍然继承溶解的类蛋白核构建块，这些构建块似乎在叶绿体分裂完成后从新凝聚成类蛋白核。因此，这种溶解和凝聚可以作为一种备用机制，以确保即使在分裂失败的情况下类蛋白核的遗传。
How is the pyrenoid inherited during cell division? During vegetative growth of Chlamydomonas, pyrenoids typically divide by fission; the pyrenoid appears to be bisected by the contracting cleavage furrow of the dividing chloroplast. However, a few minutes before this event, a substantial portion of the pyrenoid matrix dissolves into the surrounding chloroplast, and this material condenses back into the pyrenoid after chloroplast division is completed. In rare cases where pyrenoid fission fails and one of the daughter chloroplasts does not inherit a pyrenoid, it still inherits dissolved pyrenoid building blocks, which appear to condense de novo into a pyrenoid after chloroplast division is complete. This dissolution and condensation may therefore serve as a backup mechanism to ensure inheritance of a pyrenoid even when fission fails.