4gt5

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Current revision (15:55, 14 March 2024) (edit) (undo)
 
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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4gt5]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4GT5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4GT5 FirstGlance]. <br>
<table><tr><td colspan='2'>[[4gt5]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4GT5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4GT5 FirstGlance]. <br>
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</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4gt5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4gt5 OCA], [https://pdbe.org/4gt5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4gt5 RCSB], [https://www.ebi.ac.uk/pdbsum/4gt5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4gt5 ProSAT]</span></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.398&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4gt5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4gt5 OCA], [https://pdbe.org/4gt5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4gt5 RCSB], [https://www.ebi.ac.uk/pdbsum/4gt5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4gt5 ProSAT]</span></td></tr>
</table>
</table>
== Disease ==
== Disease ==
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== Function ==
== Function ==
[https://www.uniprot.org/uniprot/NTRK1_HUMAN NTRK1_HUMAN] Receptor tyrosine kinase involved in the development and the maturation of the central and peripheral nervous systems through regulation of proliferation, differentiation and survival of sympathetic and nervous neurons. High affinity receptor for NGF which is its primary ligand, it can also bind and be activated by NTF3/neurotrophin-3. However, NTF3 only supports axonal extension through NTRK1 but has no effect on neuron survival. Upon dimeric NGF ligand-binding, undergoes homodimerization, autophosphorylation and activation. Recruits, phosphorylates and/or activates several downstream effectors including SHC1, FRS2, SH2B1, SH2B2 and PLCG1 that regulate distinct overlapping signaling cascades driving cell survival and differentiation. Through SHC1 and FRS2 activates a GRB2-Ras-MAPK cascade that regulates cell differentiation and survival. Through PLCG1 controls NF-Kappa-B activation and the transcription of genes involved in cell survival. Through SHC1 and SH2B1 controls a Ras-PI3 kinase-AKT1 signaling cascade that is also regulating survival. In absence of ligand and activation, may promote cell death, making the survival of neurons dependent on trophic factors.<ref>PMID:1850821</ref> <ref>PMID:1849459</ref> <ref>PMID:8325889</ref> <ref>PMID:8155326</ref> <ref>PMID:11244088</ref> <ref>PMID:15488758</ref> Isoform TrkA-III is resistant to NGF, constitutively activates AKT1 and NF-kappa-B and is unable to activate the Ras-MAPK signaling cascade. Antagonizes the anti-proliferative NGF-NTRK1 signaling that promotes neuronal precursors differentiation. Isoform TrkA-III promotes angiogenesis and has oncogenic activity when overexpressed.<ref>PMID:1850821</ref> <ref>PMID:1849459</ref> <ref>PMID:8325889</ref> <ref>PMID:8155326</ref> <ref>PMID:11244088</ref> <ref>PMID:15488758</ref>
[https://www.uniprot.org/uniprot/NTRK1_HUMAN NTRK1_HUMAN] Receptor tyrosine kinase involved in the development and the maturation of the central and peripheral nervous systems through regulation of proliferation, differentiation and survival of sympathetic and nervous neurons. High affinity receptor for NGF which is its primary ligand, it can also bind and be activated by NTF3/neurotrophin-3. However, NTF3 only supports axonal extension through NTRK1 but has no effect on neuron survival. Upon dimeric NGF ligand-binding, undergoes homodimerization, autophosphorylation and activation. Recruits, phosphorylates and/or activates several downstream effectors including SHC1, FRS2, SH2B1, SH2B2 and PLCG1 that regulate distinct overlapping signaling cascades driving cell survival and differentiation. Through SHC1 and FRS2 activates a GRB2-Ras-MAPK cascade that regulates cell differentiation and survival. Through PLCG1 controls NF-Kappa-B activation and the transcription of genes involved in cell survival. Through SHC1 and SH2B1 controls a Ras-PI3 kinase-AKT1 signaling cascade that is also regulating survival. In absence of ligand and activation, may promote cell death, making the survival of neurons dependent on trophic factors.<ref>PMID:1850821</ref> <ref>PMID:1849459</ref> <ref>PMID:8325889</ref> <ref>PMID:8155326</ref> <ref>PMID:11244088</ref> <ref>PMID:15488758</ref> Isoform TrkA-III is resistant to NGF, constitutively activates AKT1 and NF-kappa-B and is unable to activate the Ras-MAPK signaling cascade. Antagonizes the anti-proliferative NGF-NTRK1 signaling that promotes neuronal precursors differentiation. Isoform TrkA-III promotes angiogenesis and has oncogenic activity when overexpressed.<ref>PMID:1850821</ref> <ref>PMID:1849459</ref> <ref>PMID:8325889</ref> <ref>PMID:8155326</ref> <ref>PMID:11244088</ref> <ref>PMID:15488758</ref>
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<div style="background-color:#fffaf0;">
 
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== Publication Abstract from PubMed ==
 
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To investigate the range of autoinhibitory mechanisms used by tyrosine kinase domains (TKDs) from the insulin receptor family of receptor tyrosine kinases, we determined crystal structures of TKDs from TrkA (nerve growth factor receptor) and Ror2 (an unconventional Wnt receptor). TrkA autoinhibition closely resembles that seen for insulin receptor, relying on projection of an activation loop tyrosine into the substrate binding site and occlusion of the ATP binding site by the activation loop. Ror2 employs similar mechanisms, but the unusual replacement of the phenylalanine in its Asp-Phe-Gly motif with leucine necessitates occlusion of the ATP-binding site by other means. The unusual Asp-Leu-Gly motif in Ror2 is displaced compared with other inactive kinases, allowing the activation loop to interact directly with the TKDs alphaC helix, in another mode of autoinhibition that is characteristic of the other extreme of this receptor family ALK and Met. These findings provide insight into the expected range of activating mutations in these TKDs in cancer. We also describe a symmetric dimer of the inactive TrkA TKD resembling that found in other receptor tyrosine kinases - possibly reflecting an arrangement of kinase domains in a pre-formed TrkA dimer.
 
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Assessing the range of kinase autoinhibition mechanisms in the insulin receptor family.,Artim SC, Mendrola JM, Lemmon MA Biochem J. 2012 Sep 20. PMID:22992069<ref>PMID:22992069</ref>
 
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 
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</div>
 
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<div class="pdbe-citations 4gt5" style="background-color:#fffaf0;"></div>
 
==See Also==
==See Also==
*[[High affinity nerve growth factor receptor|High affinity nerve growth factor receptor]]
*[[High affinity nerve growth factor receptor|High affinity nerve growth factor receptor]]
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*[[Tyrosine kinase receptor|Tyrosine kinase receptor]]
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*[[Tyrosine kinase receptor 3D structures|Tyrosine kinase receptor 3D structures]]
== References ==
== References ==
<references/>
<references/>

Current revision

Crystal structure of the inactive TrkA kinase domain

PDB ID 4gt5

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