Mitotic inheritance of endoplasmic reticulum in the primitive red alga Cyanidioschyzon merolae.

Abstract:

:Endoplasmic reticulum (ER) is a major site for secretory protein folding and lipid synthesis. Since ER cannot be synthesized de novo, it must be inherited during the cell cycle. Studying ER inheritance can however be difficult because the ER of typical plant and animal cells is morphologically complex. Therefore, our study used Cyanidioschyzon merolae, a species that has a simple ER structure, to investigate the inheritance of this organelle. Using immunofluorescence microscopy, we demonstrated that C. merolae contains a nuclear ER (nuclear envelope) and a small amount of peripheral ER extending from the nuclear ER. During mitosis, the nuclear ER became dumbbell-shaped and underwent division. Peripheral ER formed ring-like structures during the G1 and S phases, and extended toward the mitochondria and cell division planes during the M phase. These observations indicated that C. merolae undergoes closed mitosis, whereby the nuclear ER does not diffuse, and the peripheral ER contains cell cycle-specific structures.

journal_name

Protoplasma

journal_title

Protoplasma

authors

Yagisawa F,Fujiwara T,Kuroiwa H,Nishida K,Imoto Y,Kuroiwa T

doi

10.1007/s00709-011-0359-1

subject

Has Abstract

pub_date

2012-10-01 00:00:00

pages

1129-35

issue

4

eissn

0033-183X

issn

1615-6102

journal_volume

249

pub_type

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