Expression of the synaptic vesicle proteins VAMPs/synaptobrevins 1 and 2 in non-neural tissues
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The VAMPs/synaptobrevins (Vp/Sybs) are small integral membrane proteins. Two isoforms, Vp/Syb 1 and Vp/Syb 2, are considered to be specific to neural tissue. They are associated with synaptic vesicles and are believed to play an important role in neurotransmitter release. A third isoform, cellubrevin, has recently been found in non-neural tissues. We now report that the distribution of Vp/Syb 1 and Vp/Syb 2 is wider than previously thought. RNA transcripts for both Vp/Syb 1 and Vp/Syb 2 were found in rat skeletal muscle and in several other rat non-neural tissues, and antibodies specific for Vp/Syb 2 detected a protein in the endoplasmic reticulum-Golgi area of skeletal muscle. Thus Vp/Sybs 1 and 2 are not restricted to the nervous system but appear to be co-expressed with cellubrevin in many different tissues. This redundancy of Vp/Sybs in a single cell may be required to control the specificity of vesicle-target interaction in the several pathways of intracellular vesicle traffic that are operative within each cell.
Original language | English |
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Journal | The Journal of Biological Chemistry |
Volume | 269 |
Issue number | 22 |
Pages (from-to) | 15403-6 |
Number of pages | 4 |
ISSN | 0021-9258 |
Publication status | Published - 3 Jun 1994 |
- Adipose Tissue, Brown, Amino Acid Sequence, Animals, Brain, Endoplasmic Reticulum, Fluorescent Antibody Technique, Gene Expression, Golgi Apparatus, Male, Membrane Proteins, Molecular Sequence Data, Muscles, Nerve Tissue Proteins, Polymerase Chain Reaction, R-SNARE Proteins, Rats, Rats, Wistar, Sequence Homology, Amino Acid, Transcription, Genetic
Research areas
ID: 123666177