RTK Signalweg
Rezeptor Tyrosin Kinasen (RTKs) sind membrangebundene Kinasen, die nach der Bindung rezeptorspezifischer Liganden aktiviert werden. Sie stellen die größte Klasse der Membranrezeptoren dar, die Signalkaskaden durch ihre charakteristische Enzymaktivität auslösen. Diese Strukturen, Aktivierungsmechanismen und Schlüsselkomponenten der Signalwege sind bei Vielzellern stark konserviert. Beim Menschen sind 58 RTK bekannt, die entsprechend ihrer Topologie in 20 verschiedene Klassen eingeordnet werden.
Zu den aktivierenden Stimuli gehören eine Vielzahl von Wachstumsfaktoren, Hormonen und Zytokinen. Die meisten RTKs werden bei der Ligandenbindung aktiv und dimerisieren. Die aktivierte RTK phosphoryliert Aktivatoren der nachgeordneten Signalkaskaden, wie z. B. NF-kB-, MAPK- und Ca2+-abhängige Signalübertragungen, und des JAK-STAT-Signalwegs.
Dementsprechend beeinflussen RTKs eine große Bandbreite von Prozessen von der Dynamik des Zytoskeletts, Zellwachstum und Differenzierung bis hin zu Entzündung, Apoptose und Tumorprogression. Trotz der Vielfalt von Rezeptoren und Wirkungen sind nur wenige Kernprozesse an RTKs beteiligt. Aus diesem Grund ist die Durchführung quantitativer Analysen bestimmter Faktoren, wie z. B. die Expressionsgrenzen einer RTK, für das Verständnis der Signalübertragungsprozesse ebenso entscheidend wie für die Vorhersage qualitativer Ergebnisse.
Eine dysregulierte RTK-Signalübertragung, die häufig durch eine Überexpression oder Mutation von RTKs wie dem Insulinrezeptor (IR) oder dem Fibroblasten-Wachstumsfaktor-Rezeptor (FGFR) ausgelöst wird, trägt zu metabolischen Ungleichgewichten bei, einschließlich einer beeinträchtigten Insulinempfindlichkeit und Adipogenese. Diese Störungen fördern übermäßige Fettansammlungen und chronische Entzündungen, die charakteristisch für Adipositas sind, und beeinflussen gleichzeitig die Energiehomöostase durch die Veränderung von Signalwegen wie PI3K-AKT und MAPK. Darüber hinaus verschlimmern RTK-vermittelte Überschneidungen mit anderen Signalwegen, wie Leptin und mTOR, die bei Adipositas beobachteten Stoffwechselstörungen, was RTKs zu einem entscheidenden Ziel für das Verständnis und die Linderung dieser Erkrankung macht.entwickelt für den Einsatz im fluoreszierenden Western Blotting, aber auch für andere Immunoassays mit fluoreszierenden Markierungen.
VerwandtePathways
References:
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Ligand
ANGPT1 - Angiopoietin 1:
ANGPT2 - Angiopoietin 2:
BDNF (Brain-Derived Neurotrophic Factor):
Figf - VEGFD:
COL11A2 (Collagen, Type XI, alpha 2):
EGF (Epidermal Growth Factor):
FGF6 (Fibroblast Growth Factor 6):
FGF7 (Fibroblast Growth Factor 7):
GDNF (Glial Cell Line Derived Neurotrophic Factor):
LGALS3 - Galectin 3:
MDK - Midkine:
NGFB (Nerve Growth Factor beta):
PDGFD (Platelet Derived Growth Factor D):
TUB (Tubby Homolog):
ATF2 (Activating Transcription Factor 2):
AREG - Amphiregulin:
ANGPT4 - Angiopoietin 4:
BTC - Betacellulin:
CSF1 - M-CSF/CSF1:
EFNA1 - Ephrin A1:
EFNA3 - Ephrin A3:
EFNA4 (Ephrin A4):
EFNA5 - Ephrin A5:
EFNB1 - Ephrin B1:
EFNB2 - Ephrin B2:
EFNB3 - Ephrin B3:
EREG - Epiregulin:
EPGN - Epigen:
FGF1 (Fibroblast Growth Factor 1 (Acidic)):
FGF10 (Fibroblast Growth Factor 10):
FGF19 (Fibroblast Growth Factor 19):
FGF2 (Fibroblast Growth Factor 2 (Basic)):
FGF21 (Fibroblast Growth Factor 21):
FGF22 (Fibroblast Growth Factor 22):
FGF23 (Fibroblast Growth Factor 23):
FGF3 (Fibroblast Growth Factor 3):
FGF4 (Fibroblast Growth Factor 4):
FGF5 (Fibroblast Growth Factor 5):
FGF8 (Fibroblast Growth Factor 8 (Androgen-Induced)):
FLT3LG (Fms-Related tyrosine Kinase 3 Ligand):
GDNF (Glial Cell Line Derived Neurotrophic Factor):
GAS6 (Growth Arrest-Specific 6):
HBEGF (Heparin-Binding EGF-Like Growth Factor):
HGF (Hepatocyte Growth Factor (Hepapoietin A, Scatter Factor)):
INS - Insulin:
IGF1 (Insulin-Like Growth Factor 1):
IL34 - IL-34:
KITLG - KIT Ligand:
NRG1 - Neuregulin 1:
NRG2 - Neuregulin 2:
NRG3 - Neuregulin 3:
NRG4 - Neuregulin 4:
NTF3 - Neurotrophin 3:
NTF4 - Neurotrophin 4:
PDGFB (Platelet Derived Growth Factor Subunit B):
PDGFA (Platelet Derived Growth Factor A):
PDGFC (Platelet-Derived Growth Factor C):
PTN - Pleiotrophin:
TGFA (Transforming Growth Factor, alpha):
TULP1 (Tubby Like Protein 1):
VEGFA (Vascular Endothelial Growth Factor A):
VEGFB (Vascular Endothelial Growth Factor B):
VEGFC (Vascular Endothelial Growth Factor C):
RTK
TYRO3 (TYRO3 Protein Tyrosine Kinase):
AATK (Apoptosis-Associated tyrosine Kinase):
AXL (AXL Receptor tyrosine Kinase):
MERTK (C-Mer Proto-Oncogene Tyrosine Kinase):
EPHA3 - EPH Receptor A3:
EPHA4 - EPH Receptor A4:
EPHA5 - EPH Receptor A5:
Epha6 - EPH Receptor A6:
EPHA8 - EPH Receptor A8:
FGFR1 (Fibroblast Growth Factor Receptor 1):
FGFR2 (Fibroblast Growth Factor Receptor 2):
INSR - Insulin Receptor:
MST1R (Macrophage Stimulating 1 Receptor (C-Met-Related tyrosine Kinase)):
NTRK1 - TRKA:
NTRK2 - TRKB:
KIT (Mast/stem Cell Growth Factor Receptor):
ALK (Anaplastic Lymphoma Receptor tyrosine Kinase):
ROS1 (C-Ros Oncogene 1 , Receptor tyrosine Kinase):
CSF1R (Colony Stimulating Factor 1 Receptor):
DDR1 (Discoidin Domain Receptor tyrosine Kinase 1):
DDR2 (Discoidin Domain Receptor tyrosine Kinase 2):
EPHA10 - EPH Receptor A10:
EPHA2 - EPH Receptor A2:
EPHA7 - EPH Receptor A7:
EPHB1 - EPH Receptor B1:
EPHB2 - EPH Receptor B2:
EPHB3 - EPH Receptor B3:
EPHB4 - EPH Receptor B4:
EPHB6 - EPH Receptor B6:
EGFR (Epidermal Growth Factor Receptor):
FGFR3 (Fibroblast Growth Factor Receptor 3):
FGFR4 (Fibroblast Growth Factor Receptor 4):
FGFRL1 (Fibroblast Growth Factor Receptor-Like 1):
FLT1 (Fms-Related tyrosine Kinase 1 (VEGFR1)):
FLT3 (Fms-Related tyrosine Kinase 3):
FLT4 (Fms-Related Tyrosine Kinase 4):
INSRR (Insulin Receptor-Related Receptor):
IGF1R (Insulin-Like Growth Factor 1 Receptor):
VEGFR2 - VEGFR2/CD309:
LMTK2 (Lemur tyrosine Kinase 2):
LTK (Leukocyte Receptor tyrosine Kinase):
KIT (Mast/stem Cell Growth Factor Receptor):
MME (Membrane Metallo-Endopeptidase):
MET - c-MET:
MUSK (Muscle, Skeletal, Receptor Tyrosine Kinase):
NTRK3 (Neurotrophic tyrosine Kinase, Receptor, Type 3):
PDGFRA (Platelet Derived Growth Factor Receptor alpha):
KCNH8 (Potassium Voltage-Gated Channel, Subfamily H (Eag-Related), Member 8):
PTK7 (PTK7 Protein tyrosine Kinase 7):
ROR1 (Receptor Tyrosine Kinase-Like Orphan Receptor 1):
ROR2 (Receptor Tyrosine Kinase-Like Orphan Receptor 2):
RET - Ret Proto-Oncogene:
RYK (RYK Receptor-Like Tyrosine Kinase):
TEK (TEK Tyrosine Kinase, Endothelial):
TIE1 (tyrosine Kinase with Immunoglobulin-Like and EGF-Like Domains 1):
ERBB4 (V-Erb-A erythroblastic Leukemia Viral Oncogene Homolog 4 (Avian)):
ErbB2/Her2 (Receptor tyrosine-protein kinase erbB-2):
ERBB3 (Receptor Tyrosine-Protein Kinase ErbB-3):
Adaptors
SHC1 (SHC (Src Homology 2 Domain Containing) Transforming Protein 1):
SHC2 (SHC (Src Homology 2 Domain Containing) Transforming Protein 2):
GAB1 (GRB2-Associated Binding Protein 1):
GRB2 (Growth Factor Receptor-Bound Protein 2):
SHC3 (SHC (Src Homology 2 Domain Containing) Transforming Protein 3):
GEF
RASGRF1 (Ras Protein-Specific Guanine Nucleotide-Releasing Factor 1):
SOS1 (Son of Sevenless Homolog 1):
RAPGEF5 - GFR:
SOS2 (Son of Sevenless Homolog 2):
GTPase
RHOG (Ras Homolog Family Member G):
RAC2 (Ras-Related C3 Botulinum Toxin Substrate 2 (Rho Family, Small GTP Binding Protein Rac2)):
CDC42 (Cell Division Cycle 42 (GTP Binding Protein, 25kDa)):
NRAS - GTPase NRas:
HRAS (HRas proto-oncogene, GTPase):
RAC3 (Ras-Related C3 Botulinum Toxin Substrate 3 (Rho Family, Small GTP Binding Protein Rac3)):
Inhibitor
DEPTOR (DEP Domain Containing mTOR-Interacting Protein):
TSC1 (Tuberous Sclerosis 1):
TSC2 - Tuberin:
Kinase
MAPK1 - ERK2:
MAPK3 - ERK1:
PAK1 (P21-Activated Kinase 1):
PAK2 (P21-Activated Kinase 2):
PAK4 (P21-Activated Kinase 4):
AKT1 (V-Akt Murine Thymoma Viral Oncogene Homolog 1):
AKT2 (V-Akt Murine Thymoma Viral Oncogene Homolog 2):
AKT3 (V-Akt Murine Thymoma Viral Oncogene Homolog 3 (Protein Kinase B, Gamma)):
mTOR - MTOR:
MAP2K1 - MEK1:
MAP2K2 - MEK2:
PIK3CA (Phosphoinositide-3-Kinase, Catalytic, alpha Polypeptide):
PIK3CG - PIK3 gamma:
PRKCZ - PKC zeta:
PDK1 (Pyruvate Dehydrogenase Kinase 1):
PDK2 (Pyruvate Dehydrogenase Kinase, Isozyme 2):
RPS6KB1 (Ribosomal Protein S6 Kinase, 70kDa, Polypeptide 1):
RPS6KB2 (Ribosomal Protein S6 Kinase, 70kDa, Polypeptide 2):
Messenger
Calm2 - Calmodulin 2:
CALM3 - Calmodulin 3:
Phosphatase
PPP3CA (Protein Phosphatase 3, Catalytic Subunit, alpha Isoform):
PTPN11 (Protein tyrosine Phosphatase, Non-Receptor Type 11):
PPP3CB (Protein Phosphatase 3, Catalytic Subunit, beta Isozyme):
PPP3CC (Protein Phosphatase 3, Catalytic Subunit, gamma Isozyme):
PPP3R1 (Protein Phosphatase 3, Regulatory Subunit B, alpha):
Phospholipase
PLCG2 - Phospholipase C gamma 2:
PLCG1 - Phospholipase C gamma 1:
PLD2 - Phospholipase D2:
Pro-apoptotic
BAD (BCL2-Associated Agonist of Cell Death):
Protease
CASP9 - Caspase 9:
Protein kinase
IKBKB (Inhibitor of kappa Light Polypeptide Gene Enhancer in B-Cells, Kinase beta):
JAK1 (Janus Kinase 1):
JAK2 (Janus Kinase 2):
CHUK - IKK alpha:
IKBKG (Inhibitor of kappa Light Polypeptide Gene Enhancer in B-Cells, Kinase gamma):
JAK3 (Janus Kinase 3):
ARAF (V-Raf Murine Sarcoma 3611 Viral Oncogene Homolog):
BRAF (B-Raf proto-oncogene, serine/threonine kinase):
RAF1 (V-Raf-1 Murine Leukemia Viral Oncogene Homolog 1):
Regulator
EIF4EBP1 - eIF4EBP1:
GBL (G protein beta subunit-like):
RHEB (Ras Homolog Enriched in Brain):
Transcription factor
JUN - C-JUN:
NFATC1 (Nuclear Factor of Activated T-Cells, Cytoplasmic, Calcineurin-Dependent 1):
NFkBP65 - NF-kB p65:
STAT1 (Signal Transducer and Activator of Transcription 1, 91kDa):
STAT3 (Signal Transducer and Activator of Transcription 3 (Acute-Phase Response Factor)):
NFAT5 (Nuclear Factor of Activated T-Cells 5, Tonicity-Responsive):
NFAT1 (Nuclear Factor of Activated T-Cells, Cytoplasmic, Calcineurin-Dependent 2):
NFATC3 (Nuclear Factor of Activated T-Cells, Cytoplasmic, Calcineurin-Dependent 3):
NFATC4 (Nuclear Factor of Activated T-Cells, Cytoplasmic, Calcineurin-Dependent 4):
NFKB1 (Nuclear Factor of kappa Light Polypeptide Gene Enhancer in B-Cells 1):
STAT5A (Signal Transducer and Activator of Transcription 5A):
STAT5B (Signal Transducer and Activator of Transcription 5B):
RELB (V-Rel Reticuloendotheliosis Viral Oncogene Homolog B):
Others
ABI1 (Abl-Interactor 1):
ARPC1B (Actin Related Protein 2/3 Complex, Subunit 1B, 41kDa):
ACTR2 (Actin-Related Protein 2):
NCKAP1 (NCK Associated Protein 1):
CYFIP2 (Cytoplasmic FMR1 Interacting Protein 2):
ARPC2 (Actin Related Protein 2/3 Complex, Subunit 2, 34kDa):
ARPC3 (Actin Related Protein 2/3 Complex, Subunit 3, 21kDa):
ARPC4 (Actin Related Protein 2/3 Complex, Subunit 4, 20kDa):
ARPC5 (Actin Related Protein 2/3 Complex, Subunit 5, 16kDa):
ACTR3 (ARP3 Actin-Related Protein 3):
BRK1 (BRICK1, SCAR/WAVE Actin-Nucleating Complex Subunit):
RPTOR - Raptor:
WASF1 (WAS Protein Family, Member 1):
WASF2 (WAS Protein Family, Member 2):
WASF3 (WAS Protein Family, Member 3):
WIPF1 (WAS/WASL Interacting Protein Family, Member 1):
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