4un0

From Proteopedia

(Difference between revisions)

Current revision

Crystal structure of the human CDK12-cyclinK complex

Structural highlights

4un0 is a 4 chain structure with sequence from Homo sapiens. This structure supersedes the now removed PDB entry 4cjy. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 3.15Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

CDK12_HUMAN Chromosomal aberrations involving CDK12 may be a cause gastric cancer. Deletions within 17q12 region producing fusion transcripts with ERBB2, leading to CDK12-ERBB2 fusion leading to trunctated CDK12 protein not in-frame with ERBB2.

Function

CDK12_HUMAN Cyclin-dependent kinase which displays CTD kinase activity and is required for RNA splicing. Has CTD kinase activity by hyperphosphorylating the C-terminal heptapeptide repeat domain (CTD) of the largest RNA polymerase II subunit RPB1, thereby acting as a key regulator of transcription elongation. Required for RNA splicing, possibly by phosphorylating SRSF1/SF2. Involved in regulation of MAP kinase activity, possibly leading to affect the response to estrogn inhibitors.^[1] ^[2] ^[3]

Publication Abstract from PubMed

Cyclin-dependent kinase 12 (CDK12) promotes transcriptional elongation by phosphorylation of the RNA polymerase II C-terminal domain (CTD). Structure-function studies show that this activity is dependent on a C-terminal kinase extension, as well as the binding of cyclin K (CycK). To better define these interactions we determined the crystal structure of the human CDK12/CycK complex with and without the kinase extension in the presence of AMP-PNP. The structures revealed novel features for a CDK, including a large beta4-beta5 loop insertion that contributes to the N-lobe interaction with the cyclin. We also observed two different conformations of the C-terminal kinase extension that effectively open and close the ATP pocket. Most notably, bound AMP-PNP was only observed when trapped in the closed state. Truncation of this C-terminal structure also diminished AMP-PNP binding, as well as the catalytic activity of the CDK12/CycK complex. Further kinetic measurements showed that the full length CDK12/CycK complex was significantly more active than the two crystallised constructs suggesting a critical role for additional domains. Overall, these results demonstrate the intrinsic flexibility of the C-terminal extension in CDK12 and highlight its importance for both ATP binding and kinase activity.

Structures of the CDK12/CycK complex with AMP-PNP reveal a flexible C-terminal kinase extension important for ATP binding.,Dixon-Clarke SE, Elkins JM, Cheng SW, Morin GB, Bullock AN Sci Rep. 2015 Nov 24;5:17122. doi: 10.1038/srep17122. PMID:26597175^[4]

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

References

↑ Ko TK, Kelly E, Pines J. CrkRS: a novel conserved Cdc2-related protein kinase that colocalises with SC35 speckles. J Cell Sci. 2001 Jul;114(Pt 14):2591-603. PMID:11683387
↑ Iorns E, Martens-de Kemp SR, Lord CJ, Ashworth A. CRK7 modifies the MAPK pathway and influences the response to endocrine therapy. Carcinogenesis. 2009 Oct;30(10):1696-701. doi: 10.1093/carcin/bgp187. Epub 2009, Aug 3. PMID:19651820 doi:http://dx.doi.org/10.1093/carcin/bgp187
↑ Bartkowiak B, Liu P, Phatnani HP, Fuda NJ, Cooper JJ, Price DH, Adelman K, Lis JT, Greenleaf AL. CDK12 is a transcription elongation-associated CTD kinase, the metazoan ortholog of yeast Ctk1. Genes Dev. 2010 Oct 15;24(20):2303-16. doi: 10.1101/gad.1968210. PMID:20952539 doi:http://dx.doi.org/10.1101/gad.1968210
↑ Dixon-Clarke SE, Elkins JM, Cheng SW, Morin GB, Bullock AN. Structures of the CDK12/CycK complex with AMP-PNP reveal a flexible C-terminal kinase extension important for ATP binding. Sci Rep. 2015 Nov 24;5:17122. doi: 10.1038/srep17122. PMID:26597175 doi:http://dx.doi.org/10.1038/srep17122

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4un0"

@@ Line 4: / Line 4: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[4un0]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4cjy 4cjy]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4UN0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4UN0 FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</scene></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]] 3.15&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</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=4un0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4un0 OCA], [https://pdbe.org/4un0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4un0 RCSB], [https://www.ebi.ac.uk/pdbsum/4un0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4un0 ProSAT]</span></td></tr>
 </table>

4un0

From Proteopedia

Current revision

Crystal structure of the human CDK12-cyclinK complex

Structural highlights

Disease

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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