Publication Date:
2006-09-09
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoshida, Yamato -- Kuroiwa, Haruko -- Misumi, Osami -- Nishida, Keiji -- Yagisawa, Fumi -- Fujiwara, Takayuki -- Nanamiya, Hideaki -- Kawamura, Fujio -- Kuroiwa, Tsuneyoshi -- New York, N.Y. -- Science. 2006 Sep 8;313(5792):1435-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cell Biology, Department of Life Science, College of Science, Rikkyo (St. Paul's) University, Toshima, Tokyo 171-8501, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16960006" target="_blank"〉PubMed〈/a〉
Keywords:
Actin Cytoskeleton/*physiology/ultrastructure
;
Algal Proteins/*physiology
;
Chloroplasts/*physiology/ultrastructure
;
Dynamins/*physiology
;
GTP Phosphohydrolases/physiology
;
Intracellular Membranes/physiology/ultrastructure
;
Microscopy, Immunoelectron
;
Rhodophyta/*physiology/ultrastructure
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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