Response to elevated platelet cytosolic Ca ions (Homo sapiens)
From WikiPathways
Description
Activation of phospholipase C enzymes results in the generation of second messengers of the phosphatidylinositol pathway. The events resulting from this pathway are a rise in intracellular calcium and activation of Protein Kinase C (PKC). Phospholipase C cleaves the phosphodiester bond in PIP2 to form 1,2 Diacylglycerol (DAG) and 1,4,5-inositol trisphosphate (IP3). IP3 opens Ca2+ channels in the platelet dense tubular system, raising intracellular Ca2+ levels. DAG is a second messenger that regulates a family of Ser/Thr kinases consisting of PKC isozymes (Nishizuka 1995). DAG achieves activation of PKC isozymes by increasing their affinity for phospholipid. Most PKC enzymes are also calcium-dependent, so their activation is in synergy with the rise in intracellular Ca2+. Platelets contain several PKC isoforms that can be activated by DAG and/or Ca2+ (Chang 1997).
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Ontology Terms
Bibliography
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- Oancea E, Meyer T.; ''Protein kinase C as a molecular machine for decoding calcium and diacylglycerol signals.''; PubMed Europe PMC Scholia
- Harrison P, Cramer EM.; ''Platelet alpha-granules.''; PubMed Europe PMC Scholia
- Coppinger JA, Cagney G, Toomey S, Kislinger T, Belton O, McRedmond JP, Cahill DJ, Emili A, Fitzgerald DJ, Maguire PB.; ''Characterization of the proteins released from activated platelets leads to localization of novel platelet proteins in human atherosclerotic lesions.''; PubMed Europe PMC Scholia
- Ross D, Joyner WL.; ''Resting distribution and stimulated translocation of protein kinase C isoforms alpha, epsilon and zeta in response to bradykinin and TNF in human endothelial cells.''; PubMed Europe PMC Scholia
- DiScipio RG, Davie EW.; ''Characterization of protein S, a gamma-carboxyglutamic acid containing protein from bovine and human plasma.''; PubMed Europe PMC Scholia
- Jedlitschky G, Tirschmann K, Lubenow LE, Nieuwenhuis HK, Akkerman JW, Greinacher A, Kroemer HK.; ''The nucleotide transporter MRP4 (ABCC4) is highly expressed in human platelets and present in dense granules, indicating a role in mediator storage.''; PubMed Europe PMC Scholia
- Reed GL, Houng AK, Fitzgerald ML.; ''Human platelets contain SNARE proteins and a Sec1p homologue that interacts with syntaxin 4 and is phosphorylated after thrombin activation: implications for platelet secretion.''; PubMed Europe PMC Scholia
- Iwamoto R, Higashiyama S, Mitamura T, Taniguchi N, Klagsbrun M, Mekada E.; ''Heparin-binding EGF-like growth factor, which acts as the diphtheria toxin receptor, forms a complex with membrane protein DRAP27/CD9, which up-regulates functional receptors and diphtheria toxin sensitivity.''; PubMed Europe PMC Scholia
- Chung SH, Polgar J, Reed GL.; ''Protein kinase C phosphorylation of syntaxin 4 in thrombin-activated human platelets.''; PubMed Europe PMC Scholia
- Fukami MH.; ''Isolation of dense granules from human platelets.''; PubMed Europe PMC Scholia
- Walker TR, Watson SP.; ''Synergy between Ca2+ and protein kinase C is the major factor in determining the level of secretion from human platelets.''; PubMed Europe PMC Scholia
- Tao N, Wagner SJ, Lublin DM.; ''CD36 is palmitoylated on both N- and C-terminal cytoplasmic tails.''; PubMed Europe PMC Scholia
- Tolmachova T, Abrink M, Futter CE, Authi KS, Seabra MC.; ''Rab27b regulates number and secretion of platelet dense granules.''; PubMed Europe PMC Scholia
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- Al Hawas R, Ren Q, Ye S, Karim ZA, Filipovich AH, Whiteheart SW.; ''Munc18b/STXBP2 is required for platelet secretion.''; PubMed Europe PMC Scholia
- Houng A, Polgar J, Reed GL.; ''Munc18-syntaxin complexes and exocytosis in human platelets.''; PubMed Europe PMC Scholia
- Gogstad GO, Hagen I, Korsmo R, Solum NO.; ''Characterization of the proteins of isolated human platelet alpha-granules. Evidence for a separate alpha-granule-pool of the glycoproteins IIb and IIIa.''; PubMed Europe PMC Scholia
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History
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External references
DataNodes
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Name | Type | Database reference | Comment |
---|---|---|---|
1,2-Diacylglycerol | Unknown | 17815 (ChEBI) | |
78 kDa glucose-
regulated protein | Protein | P11021 (UniProt) | |
ABCC4 | Protein | O15439 (UniProt) | |
ABCC4 transported
dense granule content | Metabolite | REACT_24476 (Reactome) | |
ABCC4 transported
dense granule content | Metabolite | REACT_24718 (Reactome) | |
ADP | Metabolite | 16761 (ChEBI) | |
ATP | Metabolite | 15422 (ChEBI) | |
Activated conventional
protein kinase C | Complex | REACT_4434 (Reactome) | |
Calcium | Metabolite | 29108 (ChEBI) | |
Calumenin | Protein | O43852 (UniProt) | |
GAS6 | Protein | Q14393 (UniProt) | |
Phosphatidylserine | Unknown | 18304 (ChEBI) | |
Phosphorylated
platelet SEC1 protein | Protein | O00186 (UniProt) | |
Phosphorylated
syntaxin 4 | Protein | Q12846 (UniProt) | |
Platelet SEC1 protein | Protein | O00186 (UniProt) | |
Platelet alpha granule
contents | Protein | REACT_21970 (Reactome) | |
Platelet alpha granule
contents | Protein | REACT_22076 (Reactome) | |
Platelet alpha granule
membrane components that are released on degranulation | Protein | REACT_25913 (Reactome) | |
Platelet alpha granule
membrane components that are released on degranulation | Protein | REACT_26523 (Reactome) | |
Platelet dense
granule content | Unknown | REACT_21516 (Reactome) | |
Platelet dense
granule content | Metabolite | REACT_21949 (Reactome) | |
Platelet dense
granule membrane components | Protein | REACT_21483 (Reactome) | |
Platelet dense
granule membrane components | Protein | REACT_22010 (Reactome) | |
Platelet releasate
(inferred) cytosolic proteins | Protein | REACT_21475 (Reactome) | |
Platelet releasate
(inferred) cytosolic proteins | Protein | REACT_21781 (Reactome) | |
Platelet releasate
cytosolic proteins | Protein | REACT_21985 (Reactome) | |
Platelet releasate
cytosolic proteins | Protein | REACT_21997 (Reactome) | |
Platelet releasate
secretory granule proteins | Protein | REACT_21832 (Reactome) | |
Platelet releasate
secretory granule proteins | Protein | REACT_21850 (Reactome) | |
Proactivator
polypeptide | Protein | P07602 (UniProt) | |
Protein Kinase C,
conventional | Protein | REACT_4876 (Reactome) | These PKC isoforms are activated by PS in a Ca2+-dependent manner; they also bind DAG, which both increases the specificity of the enzyme for PS and also shifts the affinity for Ca2+ into the physiological range. They are targets of the tumour-promoting phorbol ester PMA, which activates these enzymes by eliminating the requirement for DAG and decreasing the concentration of Ca2+ needed for activation. |
Syntaxin 4 | Protein | Q12846 (UniProt) |
Annotated Interactions
No annotated interactions