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A neuronal surface glycoprotein associated with the cytoskeleton.
The Journal of Cell Biology
|November 1, 1984
Summary
A novel glycoprotein, GP 130, was identified in chicken embryo brains and found to be exclusively on neuronal surfaces. Its expression increases during brain development, suggesting a role in neuronal function.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Cytoskeleton-associated glycoprotein of 130-kilodalton molecular mass (GP 130) is found in chicken embryo brains.
- GP 130 is associated with actin-containing complexes, requiring specific detergents for purification.
- Its precise function and distribution in the nervous system were previously unclear.
Purpose of the Study:
- To purify and characterize GP 130.
- To investigate the distribution of GP 130 in the developing nervous system.
- To determine if GP 130 is related to other known neuronal proteins like N-CAM or vinculin.
Main Methods:
- Purification of GP 130 using nonionic and zwitterionic detergents, ion-exchange chromatography, and SDS-PAGE.
- Generation of monoclonal and polyclonal antibodies against GP 130.
- Immunohistochemical analysis of GP 130 distribution in cultured neurons and developing chicken embryos.
Main Results:
- GP 130 was successfully purified and antibodies confirmed its presence.
- GP 130 is exclusively found on the surface of neurons in both central and peripheral nervous systems.
- GP 130 is immunologically distinct from N-CAM and vinculin.
- GP 130 expression in the brain increases significantly during embryonic development, peaking in areas rich in dendrites and synapses.
Conclusions:
- GP 130 is a novel, neuron-specific surface glycoprotein.
- Its developmental expression pattern suggests a role in neuronal maturation and function.
- GP 130 is a distinct entity from N-CAM and vinculin, highlighting unique neuronal surface components.