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Isolated Chloroplast Division Machinery Can Actively Constrict After Stretching

by Yagisawa, Fumi , Nishida, Keiji , Kawamura, Fujio , Misumi, Osami , Fujiwara, Takayuki , Kuroiwa, Haruko , Kuroiwa, Tsuneyoshi , Nanamiya, Hideaki , Yoshida, Yamato

in Actin Cytoskeleton - physiology / Actin Cytoskeleton - ultrastructure / Algae / Algal Proteins - physiology / Behavioral neuroscience / Biological and medical sciences / Brain / Cell biochemistry / cell biology / Cell division / Cell kinetics / Cell physiology / Cells / Cellular biology / chloroplast division / Chloroplasts / Chloroplasts - physiology / Chloroplasts - ultrastructure / Cyanidioschyzon merolae / dynamin / Dynamins - physiology / Fundamental and applied biological sciences. Psychology / Genomes / GTP Phosphohydrolases - physiology / guanosinetriphosphatase / Intracellular Membranes - physiology / Intracellular Membranes - ultrastructure / Membranes / Microscopy, Immunoelectron / Neurons / Organelles / P branes / Plant cells / Plant physiology and development / plant proteins / plastid-diving rings / Research grants / Rhodophycota / Rhodophyta / Rhodophyta - physiology / Rhodophyta - ultrastructure

2006

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Isolated Chloroplast Division Machinery Can Actively Constrict After Stretching

by Yagisawa, Fumi , Nishida, Keiji , Kawamura, Fujio , Misumi, Osami , Fujiwara, Takayuki , Kuroiwa, Haruko , Kuroiwa, Tsuneyoshi , Nanamiya, Hideaki , Yoshida, Yamato

2006

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Isolated Chloroplast Division Machinery Can Actively Constrict After Stretching

by Yagisawa, Fumi , Nishida, Keiji , Kawamura, Fujio , Misumi, Osami , Fujiwara, Takayuki , Kuroiwa, Haruko , Kuroiwa, Tsuneyoshi , Nanamiya, Hideaki , Yoshida, Yamato

2006

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Journal Article

Isolated Chloroplast Division Machinery Can Actively Constrict After Stretching

Yagisawa, Fumi,

Nishida, Keiji,

Kawamura, Fujio,

Misumi, Osami,

Fujiwara, Takayuki,

Kuroiwa, Haruko,

Kuroiwa, Tsuneyoshi,

Nanamiya, Hideaki,

Yoshida, Yamato

2006

Overview

Chloroplast division involves plastid-dividing, dynamin, and FtsZ (PDF) rings. We isolated intact supertwisted (or spiral) and circular PDF machineries from chloroplasts of the red alga Cyanidioschyzon merolae. After individual intact PDF machineries were stretched to four times their original lengths with optical tweezers, they spontaneously returned to their original sizes. Dynamin-released PDF machineries did not retain the spiral structure and could not be stretched. Thus, dynamin may generate the motive force for contraction by filament sliding in dividing chloroplasts, in addition to pinching-off the membranes.

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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science

Subject

Actin Cytoskeleton - physiology

/ Actin Cytoskeleton - ultrastructure

/ Algae

/ Algal Proteins - physiology

/ Behavioral neuroscience

/ Biological and medical sciences

/ Brain