Actin in the Green Alga, Nitella

Bundles of microfilaments very similar in appearance to actin are present in cytoplasmic suspensions obtained from Nitella flexilis. The microfilaments bind rabbit heavy meromyosin in arrowhead arrays similar to those produced on muscle actin. The arrowheads are removed with ATP. The results provide...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 1974-02, Vol.71 (2), p.363-366
Main Authors: Palevitz, Barry A., Ash, John F., Hepler, Peter K.
Format: Article
Language:English
Subjects:
Actins
Actins - analysis
Actins - metabolism
Algae
Biochemistry
Biological Sciences: Cell Biology
Cell biology
Chemical suspensions
Chlorophyta - analysis
Chlorophyta - cytology
Chloroplasts
Cytoplasmic streaming
Eukaryotic cells
Internodes
Microfilaments
Microscopy, Electron
Myosin Subfragments - metabolism
Protein Binding
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Description
Summary:Bundles of microfilaments very similar in appearance to actin are present in cytoplasmic suspensions obtained from Nitella flexilis. The microfilaments bind rabbit heavy meromyosin in arrowhead arrays similar to those produced on muscle actin. The arrowheads are removed with ATP. The results provide evidence that actin is present in green plants, probably in the form of microfilaments thought to be involved in cytoplasmic streaming.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.71.2.363