Crossref journal-article
Rockefeller University Press
The Journal of Cell Biology (291)
Abstract

Catalytically active endothelial nitric oxide synthase (eNOS) is located on the Golgi complex and in the caveolae of endothelial cells (EC). Mislocalization of eNOS caused by mutation of the N-myristoylation or cysteine palmitoylation sites impairs production of stimulated nitric oxide (NO), suggesting that intracellular targeting is critical for optimal NO production. To investigate the molecular determinants of eNOS targeting in EC, we constructed eNOS–green fluorescent protein (GFP) chimeras to study its localization in living and fixed cells. The full-length eNOS–GFP fusion colocalized with a Golgi marker, mannosidase II, and retained catalytic activity compared to wild-type (WT) eNOS, suggesting that the GFP tag does not interfere with eNOS localization or function. Experiments with different size amino-terminal fusion partners coupled to GFP demonstrated that the first 35 amino acids of eNOS are sufficient to target GFP into the Golgi region of NIH 3T3 cells. Additionally, the unique (Gly-Leu)5 repeat located between the palmitoylation sites (Cys-15 and -26) of eNOS is necessary for its palmitoylation and thus localization, but not for N-myristoylation, membrane association, and NOS activity. The palmitoylation-deficient mutants displayed a more diffuse fluorescence pattern than did WT eNOS–GFP, but still were associated with intracellular membranes. Biochemical studies also showed that the palmitoylation-deficient mutants are associated with membranes as tightly as WT eNOS. Mutation of the N-myristoylation site Gly-2 (abolishing both N-myristoylation and palmitoylation) caused the GFP fusion protein to distribute throughout the cell as GFP alone, consistent with its primarily cytosolic nature in biochemical studies. Therefore, eNOS targets into the Golgi region of NIH 3T3 cells via the first 35 amino acids, including N-myristoylation and palmitoylation sites, and its overall membrane association requires N-myristoylation but not cysteine palmitoylation. These results suggest a novel role for fatty acylation in the specific compartmentalization of eNOS and most likely, for other dually acylated proteins, to the Golgi complex.

Bibliography

Liu, J., Hughes, T. E., & Sessa, W. C. (1997). The First 35 Amino Acids and Fatty Acylation Sites Determine the Molecular Targeting of Endothelial Nitric Oxide Synthase into the Golgi Region of Cells: A Green Fluorescent Protein Study. The Journal of Cell Biology, 137(7), 1525–1535.

Authors 3
  1. Jianwei Liu (first)
  2. Thomas E. Hughes (additional)
  3. William C. Sessa (additional)
References 48 Referenced 152
  1. 10.1073/pnas.87.2.682 / Proc Natl Acad Sci USA / Isolation of nitric oxide synthetase, a calmodulin-requiring enzyme by Bredt (1990)
  2. 10.1126/science.8303295 / Science (Wash DC) / Green fluorescent protein as a marker for gene expression by Chalfie (1994)
  3. 10.1073/pnas.91.24.11728 / Proc Natl Acad Sci USA / Signal transduction of a G protein-coupled receptor in caveolae: colocalization of endothelin and its receptor with caveolin by Chun (1994)
  4. 10.1083/jcb.131.6.1421 / J Cell Biol / Caveolin cycles between plasma membrane caveolae and the Golgi complex by microtubule-dependent and microtubule-independent steps by Conrad (1995)
  5. 10.1083/jcb.133.5.1027 / J Cell Biol / Differential distribution of α subunits and βγ subunits of heterotrimeric G proteins on Golgi membranes of the exocrine pancreas by Denker (1996)
  6. 10.1074/jbc.271.12.7154 / J Biol Chem / G-protein palmitoyltransferase activity is enriched in plasma membranes by Dunphy (1996)
  7. 10.1074/jbc.271.37.22810 / J Biol Chem / Endothelial nitric oxide synthase targeting to caveolae by Feron (1996)
  8. 10.1073/pnas.88.5.1788 / Proc Natl Acad Sci USA / Calmodulin-dependent endothelium-derived relaxing factor/nitric oxide synthase activity is present in the particulate and cytosolic fractions of bovine aortic endothelial cells by Forstermann (1991)
  9. 10.1073/pnas.93.13.6448 / Proc Natl Acad Sci USA / Targeting of nitric oxide synthase to endothelial caveolae via palmitoylation by García-Cardeña (1996)
  10. 10.1074/jbc.271.44.27237 / J Biol Chem / Endothelial nitric oxide synthase is regulated by tyrosine phosphorylation and interacts with caveolin-1 by García-Cardeña (1996)
  11. 10.1083/jcb.133.5.1007 / J Cell Biol / Multiple features of the p59fynsrc homology 4 domain define a motif for immune receptor–based activation motif (ITAM) binding and for plasma membrane localization by Gauen (1996)
  12. {'key': '2023072823512036700_B12', 'first-page': '147', 'article-title': 'Characterization of an acyltransferase acting on p21N-ras protein in a cell-free system', 'volume': '1078', 'author': 'Gutierrez', 'year': '1991', 'journal-title': 'Biochem Biophys Acta'} / Biochem Biophys Acta / Characterization of an acyltransferase acting on p21N-ras protein in a cell-free system by Gutierrez (1991)
  13. 10.1073/pnas.93.10.4845 / Proc Natl Acad Sci USA / Visualization of glucocorticoid receptor translocation and intranuclear organization in living cells with a green fluorescent protein chimera by Htun (1996)
  14. 10.1126/science.274.5293.1744 / Science (Wash DC) / A role for endothelial NO synthase in LTP revealed by adenovirus-mediated inhibition and rescue by Kantor (1996)
  15. 10.1083/jcb.125.3.639 / J Cell Biol / Distinct intracellular localization of Lck and Fyn protein tyrosine kinases in human T lymphocytes by Ley (1994)
  16. 10.1016/S0021-9258(17)32626-1 / J Biol Chem / Identification of covalently bound amino-terminal myristic acid in endothelial nitric oxide synthase by Liu (1994)
  17. 10.1021/bi00038a029 / Biochemistry / Biosynthesis and palmitoylation of endothelial nitric oxide synthase: mutagenesis of palmitoylation sites, cysteine 15 and/or 26, argue against depalmitoylation induced translocation of the enzyme by Liu (1995)
  18. 10.1021/bi961720e / Biochemistry / Palmitoylation of endothelial nitric oxide synthase is necessary for optimal stimulated release of nitric oxide: implications for caveolae localization by Liu (1996)
  19. 10.1016/0896-6273(95)90279-1 / Neuron / The jellyfish green fluorescent protein: a new tool for studying ion channel expression and function by Marshall (1995)
  20. 10.1073/pnas.90.13.6252 / Proc Natl Acad Sci USA / Phosphorylation and subcellular translocation of endothelial nitric oxide synthase by Michel (1993)
  21. 10.1016/S0021-9258(18)67479-4 / J Biol Chem / Topology of mannosidase II in rat liver Golgi membranes and release of the catalytic domain by selective proteolysis by Moreman (1986)
  22. 10.1016/S0896-6273(00)80044-6 / Neuron / Labeling neural cells using adenoviral gene transfer of membrane targeted GFP by Moriyoshi (1996)
  23. 10.1073/pnas.91.7.2800 / Proc Natl Acad Sci USA / Receptor regulation of G-protein palmitoylation by Mumby (1994)
  24. 10.1073/pnas.92.22.10339 / Proc Natl Acad Sci USA / VIP21/caveolin is a cholesterol-binding protein by Murata (1995)
  25. 10.1021/bi00090a020 / Biochemistry / Binding of acylated peptides and fatty acids to phospholipid vesicles: pertinence to myristoylated proteins by Peitzsch (1993)
  26. 10.1073/pnas.88.23.10480 / Proc Natl Acad Sci USA / Purification and characterization of particulate endothelium-derived relaxing factor synthase from cultured and native bovine aortic endothelial cells by Pollock (1991)
  27. 10.1016/0378-1119(92)90691-H / Gene (Amst) / Primary structure of the Aequorea victoria green-fluorescent protein by Prasher (1992)
  28. 10.1016/0092-8674(94)90104-X / Cell / Myristoylation and palmitoylation of Src family members: the fats of the matter by Resh (1994)
  29. 10.1128/MCB.15.7.3507 / Mol Cell Biol / Myristoylation and differential palmitoylation of the HCK protein-tyrosine kinases govern their attachment to membranes and association with caveolae by Robbins (1995)
  30. 10.1073/pnas.92.25.11776 / Proc Natl Acad Sci USA / Mutagenesis of palmitoylation sites in endothelial nitric oxide synthase identifies a novel motif for dual acylation and subcellular targeting by Robinson (1995)
  31. 10.1016/S0021-9258(19)76485-0 / J Biol Chem / Palmitoylation, sulfation, and glycosylation of the alpha subunit of the sodium channel. Role of post-translational modifications in channel assembly by Schmidt (1987)
  32. 10.1083/jcb.127.5.1217 / J Cell Biol / Filipin-sensitive caveolae-mediated transport in endothelium: reduced transcytosis, scavenger endocytosis, and capillary permeability of select macromolecules by Schnitzer (1994)
  33. 10.1074/jbc.270.24.14399 / J Biol Chem / Endothelial caveolae have the molecular transport machinery for vesicle budding, docking, and fusion including VAMP, NSF, SNAP, annexin, and GTPases by Schnitzer (1995)
  34. 10.1126/science.274.5285.239 / Science (Wash DC) / Role of GTP hydrolysis in fission of caveolae directly from plasma membranes by Schnitzer (1996)
  35. 10.1161/01.RES.72.4.921 / Circ Res / Mutation of N-myristoylation site converts endothelial cell nitric oxide synthase from a membrane to a cytosolic protein by Sessa (1993)
  36. 10.1074/jbc.270.30.17641 / J Biol Chem / The Golgi association of endothelial nitric oxide synthase is necessary for the efficient synthesis of nitric oxide by Sessa (1995)
  37. 10.1074/jbc.271.11.6518 / J Biol Chem / Acylation targets endothelia nitric-oxide synthase to plasmalemmal caveolae by Shaul (1996)
  38. 10.1083/jcb.126.2.353 / J Cell Biol / Cysteine 3 of Src family protein tyrosine kinase determines palmitoylation and localization in caveolae by Shenoy-Scaria (1994)
  39. 10.1083/jcb.124.6.927 / J Cell Biol / Amino acid residues 24-31 but not palmitoylation of cysteines 30 and 45 are required for membrane anchoring of glutamic acid decarboxylase, GAD65 by Shi (1994)
  40. 10.1083/jcb.127.5.1185 / J Cell Biol / Caveolin moves from caveolae to the Golgi apparatus in response to cholesterol oxidation by Smart (1994)
  41. 10.1083/jcb.124.3.307 / J Cell Biol / Protein kinase C activators inhibit receptor-mediated potocytosis by preventing internalization of caveolae by Smart (1994)
  42. 10.1083/jcb.131.4.929 / J Cell Biol / Hormonal regulation of caveolae internalization by Smart (1995)
  43. 10.1083/jcb.126.2.331 / J Cell Biol / A signal located within amino acids 1–27 of GAD65 is required for its targeting to the Golgi complex region by Solimena (1994)
  44. 10.1006/viro.1995.0016 / Virology / Analysis of trafficking of Rev and transdominant Rev proteins in living cells using green fluorescent protein fusions: transdominant Rev blocks the export of Rev from the nucleus to the cytoplasm by Stauber (1995)
  45. 10.1083/jcb.114.6.1113 / J Cell Biol / A heterotrimeric G protein, Gαi-3, on Golgi membranes regulates the secretion of a heparan sulfate proteoglycan in LLC–PK1 epithelial cells by Stow (1991)
  46. 10.1083/jcb.136.5.1023 / J Cell Biol / Rapid plasma membrane anchoring of newly synthesized p59fyn: selective requirement for NH2-terminal myristoylation and palmitoylation at cysteine-3 by van't Hof (1997)
  47. 10.1006/bbrc.1996.1417 / Biochem Biophys Res Commun / Bradykinin-stimulated protein tyrosine phosphorylation promotes endothelial nitric oxide synthase translocation to the cytoskeleton by Venema (1996)
  48. 10.1074/jbc.270.2.503 / J Biol Chem / Lipid modifications of trimeric G proteins by Wedegaertner (1995)
Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 12:47 p.m.)
Deposited 2 years, 1 month ago (July 28, 2023, 7:52 p.m.)
Indexed 2 months, 3 weeks ago (June 11, 2025, 5:28 a.m.)
Issued 28 years, 2 months ago (June 30, 1997)
Published 28 years, 2 months ago (June 30, 1997)
Published Online 28 years, 2 months ago (June 30, 1997)
Published Print 28 years, 2 months ago (June 30, 1997)
Funders 0

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@article{Liu_1997, title={The First 35 Amino Acids and Fatty Acylation Sites Determine the Molecular Targeting of Endothelial Nitric Oxide Synthase into the Golgi Region of Cells: A Green Fluorescent Protein Study}, volume={137}, ISSN={1540-8140}, url={http://dx.doi.org/10.1083/jcb.137.7.1525}, DOI={10.1083/jcb.137.7.1525}, number={7}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Liu, Jianwei and Hughes, Thomas E. and Sessa, William C.}, year={1997}, month=jun, pages={1525–1535} }