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SAP90, a rat presynaptic protein related to the product of the Drosophila tumor suppressor gene dlg-A.
Open accessAbstract
A novel synapse-associated protein, SAP90, accumulates around the axon hillock of Purkinje cells in rat cerebellum. By immuno-electron microscopy, SAP90 has been localized to the presynaptic termini of basket cells forming inhibitory, gamma-aminobutyric acid (GABA)ergic synapses onto Purkinje cell axon hillocks. The amino acid sequence for SAP90 has been deduced from the nucleotide sequence of a series of overlapping cDNA clones. SAP90 is related to the gene product encoded by the Drosophila tumor suppressor gene dlg-A. SAP90 and the dlg-A product share an overall sequence identity of 54%. Three distinct domains can be identified: (i) a potential cytoskeletal region consisting of three repeats of 90 amino acids in length, (ii) a domain with similarity to SH3, a putative regulatory motif found in the src family of non-receptor protein tyrosine kinases and several proteins associated with the cortical cytoskeleton, and (iii) a carboxyl-terminal domain homologous to yeast guanylate kinase. These features suggest a possible role for SAP90 in a guanine nucleotide-mediated signal transduction pathway at a subset of GABAergic synapses in the rat cerebellum.
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Cited by
Fanning, A. S., Jameson, B. J., Jesaitis, L. A., & Anderson, J. M. (1998) · Journal of Biological Chemistry · doi:10.1074/jbc.273.45.29745 · Cited by 1,432
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El-Husseini, A. E.-D., Schnell, E., Chetkovich, D. M., Nicoll, R. A., & Bredt, D. S. (2000) · Science · doi:10.1126/science.290.5495.1364 · Cited by 1,303
Nichols, D. E. (2004) · Pharmacology & Therapeutics · doi:10.1016/j.pharmthera.2003.11.002 · Cited by 1,211
Migaud, M., Charlesworth, P., Dempster, M., Webster, L. C., Watabe, A. M., Makhinson, M., He, Y., Ramsay, M. F., Morris, R. G. M., Morrison, J. H., et al. (1998) · Nature · doi:10.1038/24790 · Cited by 1,160
AMPA receptor trafficking at excitatory synapses
Bredt, D. S., & Nicoll, R. A. (2003) · Neuron · doi:10.1016/s0896-6273(03)00640-8 · Cited by 1,150
Metadata
- Authors
- Kistner, U., Wenzel, B. M., Veh, R. W., Cases-Langhoff, C., Garner, A. M., Appeltauer, U., Voss, B., Gundelfinger, E. D., & Garner, C. C.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 1993-03
- Volume
- 268
- Issue
- 7
- Pages
- 4580-4583
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W1489215358
- Cited by
- 414
- References
- 0
- FWCI
- 6.65
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Kistner, U., Wenzel, B. M., Veh, R. W., Cases-Langhoff, C., Garner, A. M., Appeltauer, U., Voss, B., Gundelfinger, E. D., & Garner, C. C. (1993). SAP90, a rat presynaptic protein related to the product of the Drosophila tumor suppressor gene dlg-A. Journal of Biological Chemistry. https://doi.org/10.1016/s0021-9258(18)53433-5
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