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A Novel Protein Phosphatase-1 Inhibitory Protein Potentiated by Protein Kinase C. Isolation from Porcine Aorta Media and Characterization1
Abstract
A novel phosphorylation-dependent inhibitory protein (IP) of porcine aorta myosin light chain phosphatase (PA-MLCP) was purified to homogeneity from porcine aorta media. The molecular mass of IP was 20 kDa. IP phosphorylated by endogenous potentiating kinase (IP-K) inhibited not only PA-MLCP activity, but also that of the catalytic subunit of protein phosphatase-1. The amino acid sequence of a peptide derived from IP phosphorylated with IP-K, RHARVT*VK, shared one of the consensus sequences phosphorylatable by protein kinase C (PKC), where T* was phosphorylated. IP was phosphorylated by PKC and the phosphorylated product inhibited PA-MLCP as strongly as IP phosphorylated with IP-K.
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Citations
Cited by
Somlyo, A. P., & Somlyo, A. V. (2000) · The Journal of Physiology · doi:10.1111/j.1469-7793.2000.t01-2-00177.x · Cited by 1,207
Dedicated Myosin Light Chain Kinases with Diverse Cellular Functions
Kamm, K. E., & Stull, J. T. (2001) · Journal of Biological Chemistry · doi:10.1074/jbc.r000028200 · Cited by 572
Brozovich, F. V., Nicholson, C. J., Degen, C. V., Gao, Y. Z., Aggarwal, M., & Morgan, K. G. (2016) · Pharmacological Reviews · doi:10.1124/pr.115.010652 · Cited by 542
Myosin phosphatase: Structure, regulation and function
Ito, M., Nakano, T., Erdődi, F., & Hartshorne, D. J. (2004) · Molecular and Cellular Biochemistry · doi:10.1023/b:mcbi.0000021373.14288.00 · Cited by 454
Myosin light chain phosphatase: subunit composition, interactions and regulation
Hartshorne, D. J., Ito, M., & Erdo¨di, F. (1998) · Journal of Muscle Research & Cell Motility · doi:10.1023/a:1005385302064 · Cited by 403
Metadata
- Authors
- Eto, M., Ohmori, T., Suzuki, M., Furuya, K., & Morita, F.
- Venue
- The Journal of Biochemistry
- Publisher
- Oxford University Press (OUP)
- Published
- 1995-12
- Volume
- 118
- Issue
- 6
- Pages
- 1104-1107
- ISSN
- 0021-924X (ISSN-L)
- 1756-2651
- OpenAlex
- W1857294168
- Cited by
- 301
- References
- 0
- FWCI
- 1.54
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: A Novel Protein Phosphatase-1 Inhibitory Protein Potentiated by Protein Kinase C. Isolation from Porcine Aorta Media and Characterization1. https://app.cochat.ai/papers/10.1093/oxfordjournals.jbchem.a124993
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- Eto, M., Ohmori, T., Suzuki, M., Furuya, K., & Morita, F. (1995). A Novel Protein Phosphatase-1 Inhibitory Protein Potentiated by Protein Kinase C. Isolation from Porcine Aorta Media and Characterization1. The Journal of Biochemistry. https://doi.org/10.1093/oxfordjournals.jbchem.a124993
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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