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Amino acid sequences surrounding the cAMP-dependent and calcium/calmodulin-dependent phosphorylation sites in rat and bovine synapsin I.
Open accessAbstract
The amino acid sequences surrounding three major phosphorylation sites in rat and bovine synapsin I have been determined by employing automated gas-phase sequencing and manual Edman degradation of purified phosphopeptide fragments. Site 1 is a serine residue phosphorylated by cAMP-dependent protein kinase and by calcium/calmodulin-dependent protein kinase I. The sequence around site 1 was derived from tryptic/chymotryptic phosphopeptides and overlapping cyanogen bromide cleavage fragments. This sequence, identical in rat and bovine synapsin I, is Asn-Tyr-Leu-Arg-Arg-Arg-Leu-Ser(P)-Asp-Ser-Asn-Phe-Met. Site 1 is located at the NH2 terminus of the protein, within the collagenase-resistant head region. Sites 2 and 3 are serine residues phosphorylated by calcium/calmodulin-dependent protein kinase II. The sequences surrounding bovine site 2 and site 3 were derived from tryptic phosphopeptides and overlapping fragments generated by cleavage with chymotrypsin, collagenase, and endoproteinase Lys-C. The sequence around bovine site 2 is Thr-Arg-Gln-Thr-Ser(P)-Val-Ser-Gly-Gln-Ala-Pro-Pro-Lys, and the sequence around bovine site 3 is Thr-Arg-Gln-Ala-Ser(P)-Gln-Ala-Gly-Pro-Met-Pro-Arg. Sites 2 and 3 are located within the COOH-terminal, collagenase-sensitive tail region of the molecule, separated by 36 amino acids. The sequences surrounding rat site 2 and site 3 were derived from tryptic phosphopeptides. The sequence around rat site 2 is Gln-Ala-Ser(P)-Ile-Ser-Gly-Pro-Ala-Pro-Pro-Lys, and the sequence around rat site 3 is Gln-Ala-Ser(P)-Gln-Ala-Gly-Pro-Gly-Pro-Arg. Thus, the sequences surrounding the four sites that are phosphorylated by calcium/calmodulin-dependent protein kinase II, namely sites 2 and 3 in rat and bovine synapsin I, exhibit a high degree of homology.
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Cited by
Synaptic Vesicle Phosphoproteins and Regulation of Synaptic Function
Greengard, P., Valtorta, F., Czernik, A. J., & Benfenati, F. (1993) · Science · doi:10.1126/science.8430330 · Cited by 1,312
Self-citationThe synapsins: Key actors of synapse function and plasticity
Cesca, F., Baldelli, P., Valtorta, F., & Benfenati, F. (2010) · Progress in Neurobiology · doi:10.1016/j.pneurobio.2010.04.006 · Cited by 654
Synapsins as Regulators of Neurotransmitter Release
Hilfiker, S., Pieribone, V. A., Czernik, A. J., Kao, H.-T., Augustine, G. J., & Greengard, P. (1999) · Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences · doi:10.1098/rstb.1999.0378 · Cited by 537
Self-citationCalcium-Regulated Phosphorylation Within the Leucine Zipper of C/EBPβ
Wegner, M., Cao, Z., & Rosenfeld, M. G. (1992) · Science · doi:10.1126/science.256.5055.370 · Cited by 391
Physiological Substrates of cAMP-Dependent Protein Kinase
Shabb, J. B. (2001) · Chemical Reviews · doi:10.1021/cr000236l · Cited by 373
Metadata
- Authors
- Czernik, A. J., Pang, D. T., & Greengard, P.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 1987-11
- Volume
- 84
- Issue
- 21
- Pages
- 7518-7522
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2146815937
- Cited by
- 179
- References
- 0
- FWCI
- 4.36
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Czernik, A. J., Pang, D. T., & Greengard, P. (1987). Amino acid sequences surrounding the cAMP-dependent and calcium/calmodulin-dependent phosphorylation sites in rat and bovine synapsin I. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.84.21.7518
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