Abstract
The Na/K-ATPase was discovered by Skou in 1957. Since then, the efforts of numerous investigators have led to the following conclusions: (a) This enzyme is indeed the molecular machine for the ATP-dependent and -coupled transport of Na+ and K+ across the plasma membrane of a living cell in which such a process (sodium pump) is detected. (b) The Na/K-ATPase is also an important signal transducer that not only interacts and regulates protein kinases, but also functions as a scaffold, capable of bringing the affector and effectors together to form functional signalosomes. This minireview discusses the interaction between the Na/K-ATPase and Src to illustrate how a P-type ATPase can act as a receptor, converting a ligand-binding signal to the activation of protein kinase cascades and the generation of second messengers.
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Abbreviations
- A domain:
-
activation domain
- ADPKD:
-
autosomal dominant polycystic kidney disease
- CD2:
-
second cytosolic domain
- CD3:
-
third cytosolic domain
- CTS:
-
cardiotonic steroids
- EGFR:
-
epidermal growth factor receptor
- ERK:
-
extracellular signal-regulated protein kinase
- FAK:
-
focal adhesion kinase
- FRET:
-
fluorescence resonance energy transfer
- GST:
-
glutathione-S-transferase
- GPCR:
-
G protein-coupled receptor
- IP3:
-
inositol triphosphate
- IP3R:
-
IP3 receptor
- IRBIT:
-
IP3R binding protein released with inositol 1,4,5-trisphosphate
- MBG:
-
marinobufagenin
- N domain:
-
nucleotide binding domain
- P domain:
-
phosphorylation domain
- PI3K:
-
phosphatidylinositol 3-kinase
- PKC:
-
protein kinase C
- PLC:
-
phospholipase C
- PTKs:
-
protein tyrosine kinases
- ROMK:
-
renal outer medullary K channel
- SERCA:
-
sarcoplasmic reticulum Ca-ATPase
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Acknowledgments
We thank Ms. Martha Heck for editing the manuscript. This work was supported by NIH grants HL-36573 and HL-67963 awarded by the National Heart, Lung and Blood Institute and NIH grant GM-78565 awarded by the National Institute of General Medical Sciences.
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Li, Z., Xie, Z. The Na/K-ATPase/Src complex and cardiotonic steroid-activated protein kinase cascades. Pflugers Arch - Eur J Physiol 457, 635–644 (2009). https://doi.org/10.1007/s00424-008-0470-0
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DOI: https://doi.org/10.1007/s00424-008-0470-0