Summary
Plectin, a large (≤500 kDa) dumbbell-shaped cytolinker protein plays an important role in the organization of the cytoskeletal network and the maintenance of cell integrity in a wide varietyof tissues and cell types. Earlier experiments revealed the presence of plectin in the central nervous system, whereas the expression in the peripheral nervous system remained unclear. Our results obtained with reverse transcriptase-PCR (RT-PCR) provide evidence that plectin is expressed in structures of the rat peripheral nervous system. In addition to well-characterized plectin transcriptswewere able to reveal novel splicing variants affecting the region coding for the central rod domain. Previous studies report a high, but tissuespecific variability of the N-terminal domain of plectin due to alternatively spliced first coding exons and the optionally spliced small exons 2á and 3á. We demonstrate for the first time, using single-cell RT-PCR and immunocytochemistry, that plectin is expressed in neurons of the rat superior cervical ganglion (SCG). Plectin transcripts of single SCG neurons, starting with exon 1c as the first coding exon, contain the optionally spliced exon 2α but lack exon 31. These data therefore suggest that plectin is expressed in rat SCG neurons as a rodless isoform with the molecular mass of 390 kDa.
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Abbreviations
- ABD:
-
actin-binding domain
- BPAG:
-
bullous pemphigoid antigen
- bp:
-
base pairs
- cDNA:
-
complementaryDNA
- DRG:
-
dorsal root ganglion
- EBS:
-
epidermolysis bullosa simplex
- GAPDH:
-
glyceraldehyde-3-phosphate dehydrogenase
- IF:
-
intermediate filament
- mAb:
-
monoclonal antibody
- MAP:
-
microtubule associated protein
- MD:
-
muscular dystrophy
- NF:
-
neurofilament
- NMJ:
-
neuromuscular junction
- PBS:
-
phosphate buffered saline
- PSD:
-
postsynaptic density
- RT-PCR:
-
reverse transcriptase-PCR
- SCG:
-
superior cervical ganglion
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Steinboeck, F., Kristufek, D. Identification of the Cytolinker Protein Plectin in Neuronal Cellst-Expression of a Rodless Isoform in Neurons of the Rat Superior Cervical Ganglion. Cell Mol Neurobiol 25, 1151–1169 (2005). https://doi.org/10.1007/s10571-005-8503-0
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DOI: https://doi.org/10.1007/s10571-005-8503-0