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Characterization of myosin V from PC12 cells
P Wolff1, P A Abreu, E M Espreafico
1Centro de Biotecnologia, Instituto Butantan, São Paulo, SP, 05503-900, Brazil.
Biochemical and Biophysical Research Communications
|August 17, 1999
Summary
Myosin V is present in PC12 cells and may play a role in neuronal differentiation. This molecular motor is found in the cytoplasm and neurites, with expression levels changing during differentiation.
Area of Science:
- Cell Biology
- Neuroscience
- Molecular Biology
Background:
- PC12 cells are a model for studying neurite outgrowth and neurotransmitter release.
- Molecular motors, such as myosin V, are potential mediators of these cellular processes.
Purpose of the Study:
- To investigate the presence and potential role of myosin V in PC12 cells during neuronal differentiation.
Main Methods:
- Overlay experiments with [(125)I]-calmodulin to identify calmodulin-binding proteins.
- Western blotting to detect myosin V and myosin II expression.
- Northern blotting to analyze myosin V transcript levels.
- Immunofluorescence cytochemistry for myosin V localization.
Main Results:
- PC12 cells contain calmodulin-binding proteins of 190-210 kDa.
- Western blots confirmed a 190 kDa myosin V component and Northern blots detected a 12 kbp transcript.
- Myosin V was localized in the cytoplasm, neurites, growth cones, and perinuclear regions.
- Myosin V and myosin II expression varied during FGF-2 and/or dibutyryl cAMP-induced differentiation.
Conclusions:
- Myosin V is present in PC12 cells.
- Myosin V is suggested to play a role in the neuronal differentiation of PC12 cells.