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5icp

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Revision as of 07:13, 3 June 2020

CDK8-CYCC IN COMPLEX WITH [(S)-2-(4-Chloro-phenyl)-pyrrolidin-1-yl]-(5-methyl-imidazo[5,1-b][1,3,4]thiadiazol-2-yl)-methanone

Structural highlights

5icp is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	5hbn
Gene:	CDK8 (HUMAN), CCNC (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CDK8_HUMAN] Component of the Mediator complex, a coactivator involved in regulated gene transcription of nearly all RNA polymerase II-dependent genes. Mediator functions as a bridge to convey information from gene-specific regulatory proteins to the basal RNA polymerase II transcription machinery. Mediator is recruited to promoters by direct interactions with regulatory proteins and serves as a scaffold for the assembly of a functional preinitiation complex with RNA polymerase II and the general transcription factors. Phosphorylates the CTD (C-terminal domain) of the large subunit of RNA polymerase II (RNAp II), which may inhibit the formation of a transcription initiation complex. Phosphorylates CCNH leading to down-regulation of the TFIIH complex and transcriptional repression. Recruited through interaction with MAML1 to hyperphosphorylate the intracellular domain of NOTCH, leading to its degradation.^[1] ^[2] [CCNC_HUMAN] Component of the Mediator complex, a coactivator involved in regulated gene transcription of nearly all RNA polymerase II-dependent genes. Mediator functions as a bridge to convey information from gene-specific regulatory proteins to the basal RNA polymerase II transcription machinery. Mediator is recruited to promoters by direct interactions with regulatory proteins and serves as a scaffold for the assembly of a functional preinitiation complex with RNA polymerase II and the general transcription factors. Binds to and activates cyclin-dependent kinase CDK8 that phosphorylates the CTD (C-terminal domain) of the large subunit of RNA polymerase II (RNAp II), which may inhibit the formation of a transcription initiation complex.^[3] ^[4]

Publication Abstract from PubMed

The mediator complex-associated cyclin dependent kinase CDK8 regulates beta-catenin-dependent transcription following activation of WNT signaling. Multiple lines of evidence suggest CDK8 may act as an oncogene in the development of colorectal cancer. Here we describe the successful optimization of an imidazo-thiadiazole series of CDK8 inhibitors that was identified in a high-throughput screening campaign and further progressed by structure-based design. In several optimization cycles, we improved the microsomal stability, potency, and kinase selectivity. The initial imidazo-thiadiazole scaffold was replaced by a 3-methyl-1H-pyrazolo[3,4-b]-pyridine which resulted in compound 25 (MSC2530818) that displayed excellent kinase selectivity, biochemical and cellular potency, microsomal stability, and is orally bioavailable. Furthermore, we demonstrated modulation of phospho-STAT1, a pharmacodynamic biomarker of CDK8 activity, and tumor growth inhibition in an APC mutant SW620 human colorectal carcinoma xenograft model after oral administration. Compound 25 demonstrated suitable potency and selectivity to progress into preclinical in vivo efficacy and safety studies.

Structure-Based Optimization of Potent, Selective, and Orally Bioavailable CDK8 Inhibitors Discovered by High-Throughput Screening.,Czodrowski P, Mallinger A, Wienke D, Esdar C, Poschke O, Busch M, Rohdich F, Eccles SA, Ortiz-Ruiz MJ, Schneider R, Raynaud FI, Clarke PA, Musil D, Schwarz D, Dale T, Urbahns K, Blagg J, Schiemann K J Med Chem. 2016 Oct 27;59(20):9337-9349. Epub 2016 Oct 7. PMID:27490956^[5]

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

References

↑ Akoulitchev S, Chuikov S, Reinberg D. TFIIH is negatively regulated by cdk8-containing mediator complexes. Nature. 2000 Sep 7;407(6800):102-6. PMID:10993082 doi:10.1038/35024111
↑ Fryer CJ, White JB, Jones KA. Mastermind recruits CycC:CDK8 to phosphorylate the Notch ICD and coordinate activation with turnover. Mol Cell. 2004 Nov 19;16(4):509-20. PMID:15546612 doi:S1097276504006409
↑ Rickert P, Seghezzi W, Shanahan F, Cho H, Lees E. Cyclin C/CDK8 is a novel CTD kinase associated with RNA polymerase II. Oncogene. 1996 Jun 20;12(12):2631-40. PMID:8700522
↑ Baek HJ, Kang YK, Roeder RG. Human Mediator enhances basal transcription by facilitating recruitment of transcription factor IIB during preinitiation complex assembly. J Biol Chem. 2006 Jun 2;281(22):15172-81. Epub 2006 Apr 4. PMID:16595664 doi:M601983200
↑ Czodrowski P, Mallinger A, Wienke D, Esdar C, Poschke O, Busch M, Rohdich F, Eccles SA, Ortiz-Ruiz MJ, Schneider R, Raynaud FI, Clarke PA, Musil D, Schwarz D, Dale T, Urbahns K, Blagg J, Schiemann K. Structure-Based Optimization of Potent, Selective, and Orally Bioavailable CDK8 Inhibitors Discovered by High-Throughput Screening. J Med Chem. 2016 Oct 27;59(20):9337-9349. Epub 2016 Oct 7. PMID:27490956 doi:http://dx.doi.org/10.1021/acs.jmedchem.6b00597

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5icp"

@@ Line 1: / Line 1: @@
 ==CDK8-CYCC IN COMPLEX WITH [(S)-2-(4-Chloro-phenyl)-pyrrolidin-1-yl]-(5-methyl-imidazo[5,1-b][1,3,4]thiadiazol-2-yl)-methanone==
-<StructureSection load='5icp' size='340' side='right' caption='[[5icp]], [[Resolution|resolution]] 2.18&Aring;' scene=''>
+<StructureSection load='5icp' size='340' side='right'caption='[[5icp]], [[Resolution|resolution]] 2.18&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5icp]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5ICP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5ICP FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5icp]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5ICP OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5ICP FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=69Z:[(2S)-2-(4-CHLOROPHENYL)PYRROLIDIN-1-YL](5-METHYLIMIDAZO[5,1-B][1,3,4]THIADIAZOL-2-YL)METHANONE'>69Z</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=FMT:FORMIC+ACID'>FMT</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=69Z:[(2S)-2-(4-CHLOROPHENYL)PYRROLIDIN-1-YL](5-METHYLIMIDAZO[5,1-B][1,3,4]THIADIAZOL-2-YL)METHANONE'>69Z</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=FMT:FORMIC+ACID'>FMT</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5hbn|5hbn]]</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5icp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5icp OCA], [http://pdbe.org/5icp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5icp RCSB], [http://www.ebi.ac.uk/pdbsum/5icp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5icp ProSAT]</span></td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CDK8 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), CCNC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5icp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5icp OCA], [http://pdbe.org/5icp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5icp RCSB], [http://www.ebi.ac.uk/pdbsum/5icp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5icp ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 19: / Line 20: @@
 </div>
 <div class="pdbe-citations 5icp" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Cyclin 3D structures|Cyclin 3D structures]]
+*[[Cyclin-dependent kinase 3D structures|Cyclin-dependent kinase 3D structures]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Blagg, J]]
 [[Category: Czodrowski, P]]

5icp

From Proteopedia

Revision as of 07:13, 3 June 2020

CDK8-CYCC IN COMPLEX WITH [(S)-2-(4-Chloro-phenyl)-pyrrolidin-1-yl]-(5-methyl-imidazo[5,1-b][1,3,4]thiadiazol-2-yl)-methanone

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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