Caveolin-1 scaffolding domain residue phenylalanine 92 modulates Akt signaling. 2015

Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
Centre for Heart Lung Innovation, St. Paul's Hospital, Canada; Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Cananda.

Caveolin-1 (Cav-1), the homo-oligomeric coat protein of cholesterol-rich caveolae signalosomes, regulates signaling proteins including endothelial nitric oxide synthase (eNOS). The Cav-1 scaffolding domain (a.a. 82-101) inhibits activated eNOS from producing vascular protective nitric oxide (NO), an enzymatic process involving trafficking and phosphorylation. However, we demonstrated that Cav-1 proteins and peptides bearing F92A substitution (CAV(F92A)) could promote cardioprotective NO, most likely by preventing inhibition of eNOS by Cav-1. Herein, we showed that wild-type CAV sequence could, similar to CAV(F92A), stimulate basal NO release, indicating a need to better characterize the importance of F92 in the regulation of eNOS by Cav-1/CAV. To reduce uptake sequence-associated effects, we conjugated a wild-type CAV derivative (CAV(WT)) or a F92A variant (CAV(F92A)) to antennapedia peptide (AP) or lipophilic myristic acid (Myr) and compared their effect on eNOS regulation in endothelial cells. We observed that both CAV(WT) and CAV(F92A) could increase basal NO release, although F92A substitution potentiates this response. We show that F92A substitution does not influence peptide uptake, endogenous Cav-1 oligomerization status and Cav-1 and eNOS distribution to cholesterol-enriched subcellular fractions. Instead, F92A substitution in CAV(WT) influences Akt activation and downstream eNOS phosphorylation status. Furthermore, we show that the cell permeabilization sequence could alter subcellular localization of endogenous proteins, an unexpected way to target different protein signaling cascades. Taken together, this suggests that we have identified the basis for two different pharmacophores to promote NO release; furthermore, there is a need to better characterize the effect of uptake sequences on the cellular trafficking of pharmacophores.

UI MeSH Term Description Entries
D009569 Nitric Oxide A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP. Endogenous Nitrate Vasodilator,Mononitrogen Monoxide,Nitric Oxide, Endothelium-Derived,Nitrogen Monoxide,Endothelium-Derived Nitric Oxide,Monoxide, Mononitrogen,Monoxide, Nitrogen,Nitrate Vasodilator, Endogenous,Nitric Oxide, Endothelium Derived,Oxide, Nitric,Vasodilator, Endogenous Nitrate
D010455 Peptides Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are considered to be larger versions of peptides that can form into complex structures such as ENZYMES and RECEPTORS. Peptide,Polypeptide,Polypeptides
D010649 Phenylalanine An essential aromatic amino acid that is a precursor of MELANIN; DOPAMINE; noradrenalin (NOREPINEPHRINE), and THYROXINE. Endorphenyl,L-Phenylalanine,Phenylalanine, L-Isomer,L-Isomer Phenylalanine,Phenylalanine, L Isomer
D002417 Cattle Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor. Beef Cow,Bos grunniens,Bos indicus,Bos indicus Cattle,Bos taurus,Cow,Cow, Domestic,Dairy Cow,Holstein Cow,Indicine Cattle,Taurine Cattle,Taurus Cattle,Yak,Zebu,Beef Cows,Bos indicus Cattles,Cattle, Bos indicus,Cattle, Indicine,Cattle, Taurine,Cattle, Taurus,Cattles, Bos indicus,Cattles, Indicine,Cattles, Taurine,Cattles, Taurus,Cow, Beef,Cow, Dairy,Cow, Holstein,Cows,Dairy Cows,Domestic Cow,Domestic Cows,Indicine Cattles,Taurine Cattles,Taurus Cattles,Yaks,Zebus
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D015398 Signal Transduction The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway. Cell Signaling,Receptor-Mediated Signal Transduction,Signal Pathways,Receptor Mediated Signal Transduction,Signal Transduction Pathways,Signal Transduction Systems,Pathway, Signal,Pathway, Signal Transduction,Pathways, Signal,Pathways, Signal Transduction,Receptor-Mediated Signal Transductions,Signal Pathway,Signal Transduction Pathway,Signal Transduction System,Signal Transduction, Receptor-Mediated,Signal Transductions,Signal Transductions, Receptor-Mediated,System, Signal Transduction,Systems, Signal Transduction,Transduction, Signal,Transductions, Signal
D017434 Protein Structure, Tertiary The level of protein structure in which combinations of secondary protein structures (ALPHA HELICES; BETA SHEETS; loop regions, and AMINO ACID MOTIFS) pack together to form folded shapes. Disulfide bridges between cysteines in two different parts of the polypeptide chain along with other interactions between the chains play a role in the formation and stabilization of tertiary structure. Tertiary Protein Structure,Protein Structures, Tertiary,Tertiary Protein Structures
D042783 Endothelial Cells Highly specialized EPITHELIAL CELLS that line the HEART; BLOOD VESSELS; and lymph vessels, forming the ENDOTHELIUM. They are polygonal in shape and joined together by TIGHT JUNCTIONS. The tight junctions allow for variable permeability to specific macromolecules that are transported across the endothelial layer. Capillary Endothelial Cells,Lymphatic Endothelial Cells,Vascular Endothelial Cells,Capillary Endothelial Cell,Cell, Capillary Endothelial,Cell, Endothelial,Cell, Lymphatic Endothelial,Cell, Vascular Endothelial,Cells, Capillary Endothelial,Cells, Endothelial,Cells, Lymphatic Endothelial,Cells, Vascular Endothelial,Endothelial Cell,Endothelial Cell, Capillary,Endothelial Cell, Lymphatic,Endothelial Cell, Vascular,Endothelial Cells, Capillary,Endothelial Cells, Lymphatic,Endothelial Cells, Vascular,Lymphatic Endothelial Cell,Vascular Endothelial Cell
D051057 Proto-Oncogene Proteins c-akt Protein-serine-threonine kinases that contain PLECKSTRIN HOMOLOGY DOMAINS and are activated by PHOSPHORYLATION in response to GROWTH FACTORS or INSULIN. They play a major role in cell metabolism, growth, and survival as a core component of SIGNAL TRANSDUCTION. Three isoforms have been described in mammalian cells. akt Proto-Oncogene Protein,c-akt Protein,AKT1 Protein Kinase,AKT2 Protein Kinase,AKT3 Protein Kinase,Akt-alpha Protein,Akt-beta Protein,Akt-gamma Protein,Protein Kinase B,Protein Kinase B alpha,Protein Kinase B beta,Protein Kinase B gamma,Protein-Serine-Threonine Kinase (Rac),Proto-Oncogene Protein Akt,Proto-Oncogene Protein RAC,Proto-Oncogene Proteins c-akt1,Proto-Oncogene Proteins c-akt2,Proto-Oncogene Proteins c-akt3,RAC-PK Protein,Rac Protein Kinase,Rac-PK alpha Protein,Rac-PK beta Protein,Related to A and C-Protein,c-akt Proto-Oncogene Protein,Akt alpha Protein,Akt beta Protein,Akt gamma Protein,Akt, Proto-Oncogene Protein,Protein, akt Proto-Oncogene,Protein, c-akt Proto-Oncogene,Proteins c-akt1, Proto-Oncogene,Proteins c-akt2, Proto-Oncogene,Proteins c-akt3, Proto-Oncogene,Proto Oncogene Protein Akt,Proto Oncogene Protein RAC,Proto Oncogene Proteins c akt,Proto Oncogene Proteins c akt1,Proto Oncogene Proteins c akt2,Proto Oncogene Proteins c akt3,Proto-Oncogene Protein, akt,Proto-Oncogene Protein, c-akt,RAC PK Protein,RAC, Proto-Oncogene Protein,Rac PK alpha Protein,Rac PK beta Protein,Related to A and C Protein,akt Proto Oncogene Protein,alpha Protein, Rac-PK,c akt Proto Oncogene Protein,c-akt, Proto-Oncogene Proteins,c-akt1, Proto-Oncogene Proteins,c-akt2, Proto-Oncogene Proteins,c-akt3, Proto-Oncogene Proteins

Related Publications

Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
April 2024, Biochemical Society transactions,
Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
October 2011, Cellular and molecular neurobiology,
Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
October 2018, International immunopharmacology,
Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
January 2016, Advances in experimental medicine and biology,
Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
July 2007, ACS chemical biology,
Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
January 2012, PloS one,
Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
June 2018, International journal of molecular sciences,
Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
January 2013, PloS one,
Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
October 2020, JCI insight,
Andy E Trane, and Matti A Hiob, and Tanya Uy, and Dmitri Pavlov, and Pascal Bernatchez
June 2022, Scientific reports,
Copied contents to your clipboard!