View source for 4btk


==TTBK1 in complex with inhibitor==
<StructureSection load='4btk' size='340' side='right'caption='[[4btk]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4btk]] 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=4BTK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4BTK 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]] 2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DMS:DIMETHYL+SULFOXIDE'>DMS</scene>, <scene name='pdbligand=DTQ:4-[3-HYDROXYANILINO]-6,7-DIMETHOXYQUINAZOLINE'>DTQ</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=4btk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4btk OCA], [https://pdbe.org/4btk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4btk RCSB], [https://www.ebi.ac.uk/pdbsum/4btk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4btk ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TTBK1_HUMAN TTBK1_HUMAN] Serine/threonine kinase which is able to phosphorylate TAU on serine, threonine and tyrosine residues. Induces aggregation of TAU.<ref>PMID:16923168</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Tau-tubulin kinase 1 (TTBK1) is a serine/threonine/tyrosine kinase that putatively phosphorylates residues including S422 in tau protein. Hyperphosphorylation of tau protein is the primary cause of tau pathology and neuronal death associated with Alzheimer's disease. A library of 12 truncation variants comprising the TTBK1 kinase domain was screened for expression in Escherichia coli and insect cells. One variant (residues 14-313) could be purified, but mass spectrometric analysis revealed extensive phosphorylation of the protein. Co-expression with lambda phosphatase in E. coli resulted in production of homogeneous, nonphosphorylated TTBK1. Binding of ATP and several compounds to TTBK1 was characterized by surface plasmon resonance. Crystal structures of TTBK1 in the unliganded form and in complex with ATP, and two high-affinity ATP-competitive inhibitors, 3-[(6,7-dimethoxyquinazolin-4-yl)amino]phenol (1) and methyl 2-bromo-5-(7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)benzoate (2), were elucidated. The structure revealed two clear basic patches near the ATP pocket providing an explanation of TTBK1 for phosphorylation-primed substrates. Interestingly, compound 2 displayed slow binding kinetics to TTBK1, the structure of TTBK1 in complex with this compound revealed a reorganization of the L199-D200 peptide backbone conformation together with altered hydrogen bonding with compound 2. These conformational changes necessary for the binding of compound 2 are likely the basis of the slow kinetics. This first TTBK1 structure can assist the discovery of novel inhibitors for the treatment of Alzheimer's disease.

X-ray Structural Analysis of Tau-Tubulin Kinase 1 and Its Interactions with Small Molecular Inhibitors.,Xue Y, Wan PT, Hillertz P, Schweikart F, Zhao Y, Wissler L, Dekker N ChemMedChem. 2013 Sep 13. doi: 10.1002/cmdc.201300274. PMID:24039150<ref>PMID:24039150</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4btk" style="background-color:#fffaf0;"></div>

==See Also==
*[[Tau-tubulin kinase 3D structures|Tau-tubulin kinase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Dekker N]]
[[Category: Hillertz P]]
[[Category: Schweikart F]]
[[Category: Wan P]]
[[Category: Wissler L]]
[[Category: Xue Y]]
[[Category: Zhao Y]]