7q7k: Difference between revisions

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<StructureSection load='7q7k' size='340' side='right'caption='[[7q7k]], [[Resolution|resolution]] 1.61&Aring;' scene=''>
<StructureSection load='7q7k' size='340' side='right'caption='[[7q7k]], [[Resolution|resolution]] 1.61&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[7q7k]] 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=7Q7K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7Q7K FirstGlance]. <br>
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7Q7K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7Q7K FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.61&#8491;</td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.61&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=9I5:4-(2-azanyl-8-methoxy-quinazolin-6-yl)phenol'>9I5</scene>, <scene name='pdbligand=PTR:O-PHOSPHOTYROSINE'>PTR</scene></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=9I5:4-(2-azanyl-8-methoxy-quinazolin-6-yl)phenol'>9I5</scene>, <scene name='pdbligand=PTR:O-PHOSPHOTYROSINE'>PTR</scene></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=7q7k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7q7k OCA], [https://pdbe.org/7q7k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7q7k RCSB], [https://www.ebi.ac.uk/pdbsum/7q7k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7q7k ProSAT]</span></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=7q7k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7q7k OCA], [https://pdbe.org/7q7k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7q7k RCSB], [https://www.ebi.ac.uk/pdbsum/7q7k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7q7k ProSAT]</span></td></tr>
</table>
</table>
== Disease ==
<div style="background-color:#fffaf0;">
[https://www.uniprot.org/uniprot/JAK2_HUMAN JAK2_HUMAN] Note=Chromosomal aberrations involving JAK2 are found in both chronic and acute forms of eosinophilic, lymphoblastic and myeloid leukemia. Translocation t(8;9)(p22;p24) with PCM1 links the protein kinase domain of JAK2 to the major portion of PCM1. Translocation t(9;12)(p24;p13) with ETV6.  Defects in JAK2 are a cause of susceptibility to Budd-Chiari syndrome (BDCHS) [MIM:[https://omim.org/entry/600880 600880]. A syndrome caused by obstruction of hepatic venous outflow involving either the hepatic veins or the terminal segment of the inferior vena cava. Obstructions are generally caused by thrombosis and lead to hepatic congestion and ischemic necrosis. Clinical manifestations observed in the majority of patients include hepatomegaly, right upper quadrant pain and abdominal ascites. Budd-Chiari syndrome is associated with a combination of disease states including primary myeloproliferative syndromes and thrombophilia due to factor V Leiden, protein C deficiency and antithrombin III deficiency. Budd-Chiari syndrome is a rare but typical complication in patients with polycythemia vera. Defects in JAK2 are a cause of polycythemia vera (PV) [MIM:[https://omim.org/entry/263300 263300]. A myeloproliferative disorder characterized by abnormal proliferation of all hematopoietic bone marrow elements, erythroid hyperplasia, an absolute increase in total blood volume, but also by myeloid leukocytosis, thrombocytosis and splenomegaly.<ref>PMID:15781101</ref> <ref>PMID:15793561</ref> <ref>PMID:15858187</ref> <ref>PMID:16603627</ref>  Defects in JAK2 gene may be the cause of thrombocythemia type 3 (THCYT3) [MIM:[https://omim.org/entry/614521 614521]. A myeloproliferative disorder characterized by elevated platelet levels due to sustained proliferation of megakaryocytes, and frequently lead to thrombotic and haemorrhagic complications.<ref>PMID:16325696</ref> <ref>PMID:22397670</ref>  Defects in JAK2 are a cause of myelofibrosis (MYELOF) [MIM:[https://omim.org/entry/254450 254450]. Myelofibrosis is a disorder characterized by replacement of the bone marrow by fibrous tissue, occurring in association with a myeloproliferative disorder. Clinical manifestations may include anemia, pallor, splenomegaly, hypermetabolic state, petechiae, ecchymosis, bleeding, lymphadenopathy, hepatomegaly, portal hypertension.  Defects in JAK2 are a cause of acute myelogenous leukemia (AML) [MIM:[https://omim.org/entry/601626 601626]. AML is a malignant disease in which hematopoietic precursors are arrested in an early stage of development.<ref>PMID:16247455</ref>
== Publication Abstract from PubMed ==
== Function ==
The Janus family of tyrosine kinases (JAK1, JAK2, JAK3, and TYK2) play an essential role in the receptor signaling of cytokines that have been implicated in the pathogenesis of severe asthma, and there is emerging interest in the development of small-molecule-inhaled JAK inhibitors as treatments. Here, we describe the optimization of a quinazoline series of JAK inhibitors and the results of mouse lung pharmacokinetic (PK) studies where only low concentrations of parent compound were observed. Subsequent investigations revealed that the low exposure was due to metabolism by aldehyde oxidase (AO), so we sought to identify quinazolines that were not metabolized by AO. We found that specific substituents at the quinazoline 2-position prevented AO metabolism and this was rationalized through computational docking studies in the AO binding site, but they compromised kinome selectivity. Results presented here highlight that AO metabolism is a potential issue in the lung.
[https://www.uniprot.org/uniprot/JAK2_HUMAN JAK2_HUMAN] Non-receptor tyrosine kinase involved in various processes such as cell growth, development, differentiation or histone modifications. Mediates essential signaling events in both innate and adaptive immunity. In the cytoplasm, plays a pivotal role in signal transduction via its association with type I receptors such as growth hormone (GHR), prolactin (PRLR), leptin (LEPR), erythropoietin (EPOR), thrombopoietin (THPO); or type II receptors including IFN-alpha, IFN-beta, IFN-gamma and multiple interleukins. Following ligand-binding to cell surface receptors, phosphorylates specific tyrosine residues on the cytoplasmic tails of the receptor, creating docking sites for STATs proteins. Subsequently, phosphorylates the STATs proteins once they are recruited to the receptor. Phosphorylated STATs then form homodimer or heterodimers and translocate to the nucleus to activate gene transcription. For example, cell stimulation with erythropoietin (EPO) during erythropoiesis leads to JAK2 autophosphorylation, activation, and its association with erythropoietin receptor (EPOR) that becomes phosphorylated in its cytoplasmic domain. Then, STAT5 (STAT5A or STAT5B) is recruited, phosphorylated and activated by JAK2. Once activated, dimerized STAT5 translocates into the nucleus and promotes the transcription of several essential genes involved in the modulation of erythropoiesis. In addition, JAK2 mediates angiotensin-2-induced ARHGEF1 phosphorylation. Plays a role in cell cycle by phosphorylating CDKN1B. Cooperates with TEC through reciprocal phosphorylation to mediate cytokine-driven activation of FOS transcription. In the nucleus, plays a key role in chromatin by specifically mediating phosphorylation of 'Tyr-41' of histone H3 (H3Y41ph), a specific tag that promotes exclusion of CBX5 (HP1 alpha) from chromatin.<ref>PMID:12023369</ref> <ref>PMID:19783980</ref> <ref>PMID:20098430</ref> <ref>PMID:21423214</ref>  
 
Investigation of Janus Kinase (JAK) Inhibitors for Lung Delivery and the Importance of Aldehyde Oxidase Metabolism.,Wellaway CR, Baldwin IR, Bamborough P, Barker D, Bartholomew MA, Chung CW, Dumpelfeld B, Evans JP, Fazakerley NJ, Homes P, Keeling SP, Lewell XQ, McNab FW, Morley J, Needham D, Neu M, van Oosterhout AJM, Pal A, Reinhard FBM, Rianjongdee F, Robertson CM, Rowland P, Shah RR, Sherriff EB, Sloan LA, Teague S, Thomas DA, Wellaway N, Wojno-Picon J, Woolven JM, Coe DM J Med Chem. 2022 Jan 13;65(1):633-664. doi: 10.1021/acs.jmedchem.1c01765. Epub, 2021 Dec 20. PMID:34928601<ref>PMID:34928601</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7q7k" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Rowland P]]
[[Category: Rowland P]]

Latest revision as of 14:22, 23 October 2024

JAK2 in complex with 4-(2-amino-8-methoxyquinazolin-6-yl)phenolJAK2 in complex with 4-(2-amino-8-methoxyquinazolin-6-yl)phenol

Structural highlights

Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.61Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Publication Abstract from PubMed

The Janus family of tyrosine kinases (JAK1, JAK2, JAK3, and TYK2) play an essential role in the receptor signaling of cytokines that have been implicated in the pathogenesis of severe asthma, and there is emerging interest in the development of small-molecule-inhaled JAK inhibitors as treatments. Here, we describe the optimization of a quinazoline series of JAK inhibitors and the results of mouse lung pharmacokinetic (PK) studies where only low concentrations of parent compound were observed. Subsequent investigations revealed that the low exposure was due to metabolism by aldehyde oxidase (AO), so we sought to identify quinazolines that were not metabolized by AO. We found that specific substituents at the quinazoline 2-position prevented AO metabolism and this was rationalized through computational docking studies in the AO binding site, but they compromised kinome selectivity. Results presented here highlight that AO metabolism is a potential issue in the lung.

Investigation of Janus Kinase (JAK) Inhibitors for Lung Delivery and the Importance of Aldehyde Oxidase Metabolism.,Wellaway CR, Baldwin IR, Bamborough P, Barker D, Bartholomew MA, Chung CW, Dumpelfeld B, Evans JP, Fazakerley NJ, Homes P, Keeling SP, Lewell XQ, McNab FW, Morley J, Needham D, Neu M, van Oosterhout AJM, Pal A, Reinhard FBM, Rianjongdee F, Robertson CM, Rowland P, Shah RR, Sherriff EB, Sloan LA, Teague S, Thomas DA, Wellaway N, Wojno-Picon J, Woolven JM, Coe DM J Med Chem. 2022 Jan 13;65(1):633-664. doi: 10.1021/acs.jmedchem.1c01765. Epub, 2021 Dec 20. PMID:34928601[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

See Also

References

  1. ↑ Wellaway CR, Baldwin IR, Bamborough P, Barker D, Bartholomew MA, Chung CW, Dümpelfeld B, Evans JP, Fazakerley NJ, Homes P, Keeling SP, Lewell XQ, McNab FW, Morley J, Needham D, Neu M, van Oosterhout AJM, Pal A, Reinhard FBM, Rianjongdee F, Robertson CM, Rowland P, Shah RR, Sherriff EB, Sloan LA, Teague S, Thomas DA, Wellaway N, Wojno-Picon J, Woolven JM, Coe DM. Investigation of Janus Kinase (JAK) Inhibitors for Lung Delivery and the Importance of Aldehyde Oxidase Metabolism. J Med Chem. 2022 Jan 13;65(1):633-664. PMID:34928601 doi:10.1021/acs.jmedchem.1c01765

7q7k, resolution 1.61Å

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