GP1b-IX-V activation signaling (Homo sapiens)
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Description
The platelet GPIb complex (GP1b-IX-V) together with GPVI are primarily responsible for regulating the initial adhesion of platelets to the damaged blood vessel and platelet activation. The importance of GPIb is demonstrated by the bleeding problems in patients with Bernard-Soulier syndrome where this receptor is either absent or defective. GP1b-IX-V binds von Willebrand Factor (vWF) to resting platelets, particularly under conditions of high shear stress. This transient interaction is the first stage of the vascular repair process. Activation of GP1b-IX-V on exposure of the fibrous matrix following atherosclerotic plaque rupture, or in occluded arteries, is a major contributory factor leading to thrombus formation leading to heart attack or stroke.
GpIb also binds thrombin (Yamamoto et al. 1986), at a site distinct from the site of vWF binding, acting as a docking site for thrombin which then activates Proteinase Activated Receptors leading to enhanced platelet activation (Dormann et al. 2000).
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Ontology Terms
Bibliography
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- Feng S, Christodoulides N, Reséndiz JC, Berndt MC, Kroll MH.; ''Cytoplasmic domains of GpIbalpha and GpIbbeta regulate 14-3-3zeta binding to GpIb/IX/V.''; PubMed Europe PMC Scholia
- Munday AD, Berndt MC, Mitchell CA.; ''Phosphoinositide 3-kinase forms a complex with platelet membrane glycoprotein Ib-IX-V complex and 14-3-3zeta.''; PubMed Europe PMC Scholia
- Andrews RK, Harris SJ, McNally T, Berndt MC.; ''Binding of purified 14-3-3 zeta signaling protein to discrete amino acid sequences within the cytoplasmic domain of the platelet membrane glycoprotein Ib-IX-V complex.''; PubMed Europe PMC Scholia
- Okita JR, Pidard D, Newman PJ, Montgomery RR, Kunicki TJ.; ''On the association of glycoprotein Ib and actin-binding protein in human platelets.''; PubMed Europe PMC Scholia
- Fantl WJ, Muslin AJ, Kikuchi A, Martin JA, MacNicol AM, Gross RW, Williams LT.; ''Activation of Raf-1 by 14-3-3 proteins.''; PubMed Europe PMC Scholia
- Ruggeri ZM, Mendolicchio GL.; ''Adhesion mechanisms in platelet function.''; PubMed Europe PMC Scholia
- Andrews RK, Berndt MC.; ''Platelet physiology and thrombosis.''; PubMed Europe PMC Scholia
- Du X, Fox JE, Pei S.; ''Identification of a binding sequence for the 14-3-3 protein within the cytoplasmic domain of the adhesion receptor, platelet glycoprotein Ib alpha.''; PubMed Europe PMC Scholia
- Ikeda Y, Handa M, Kawano K, Kamata T, Murata M, Araki Y, Anbo H, Kawai Y, Watanabe K, Itagaki I.; ''The role of von Willebrand factor and fibrinogen in platelet aggregation under varying shear stress.''; PubMed Europe PMC Scholia
- Cleghon V, Morrison DK.; ''Raf-1 interacts with Fyn and Src in a non-phosphotyrosine-dependent manner.''; PubMed Europe PMC Scholia
- Du X, Harris SJ, Tetaz TJ, Ginsberg MH, Berndt MC.; ''Association of a phospholipase A2 (14-3-3 protein) with the platelet glycoprotein Ib-IX complex.''; PubMed Europe PMC Scholia
- Williamson D, Pikovski I, Cranmer SL, Mangin P, Mistry N, Domagala T, Chehab S, Lanza F, Salem HH, Jackson SP.; ''Interaction between platelet glycoprotein Ibalpha and filamin-1 is essential for glycoprotein Ib/IX receptor anchorage at high shear.''; PubMed Europe PMC Scholia
- Ozaki Y, Asazuma N, Suzuki-Inoue K, Berndt MC.; ''Platelet GPIb-IX-V-dependent signaling.''; PubMed Europe PMC Scholia
History
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External references
DataNodes
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Name | Type | Database reference | Comment |
---|---|---|---|
14-3-3-zeta:
Raf1 | Complex | REACT_24804 (Reactome) | |
14-3-3zeta
dimer | Complex | REACT_24853 (Reactome) | |
Active SRC (p-Y419) | Protein | P12931-1 (UniProt) | |
Active c-Src:Raf1 | Complex | REACT_24303 (Reactome) | |
Filamin-A | Protein | P21333 (UniProt) | |
GPIb-IX-V:vWF | Complex | REACT_24749 (Reactome) | |
GPIb-IX-V:vWF:
filamin-A | Complex | REACT_24471 (Reactome) | |
GPIb-IX-V:vWF:14-
3-3-zeta | Complex | REACT_24215 (Reactome) | |
GPIb-IX-V:vWF:14-
3-3-zeta:p85 | Complex | REACT_24633 (Reactome) | |
PI3K-p85 | Protein | P27986 (UniProt) | |
Raf-1 | Protein | P04049 (UniProt) | |
SRC | Protein | P12931-1 (UniProt) |
Annotated Interactions
No annotated interactions