View source for 2yn8


==ephB4 kinase domain inhibitor complex==
<StructureSection load='2yn8' size='340' side='right'caption='[[2yn8]], [[Resolution|resolution]] 2.11&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2yn8]] 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=2YN8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2YN8 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=STU:STAUROSPORINE'>STU</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2bba|2bba]], [[2vwu|2vwu]], [[2vwv|2vwv]], [[2vww|2vww]], [[2vwx|2vwx]], [[2vwy|2vwy]], [[2vwz|2vwz]], [[2vx0|2vx0]], [[2vx1|2vx1]], [[2x9f|2x9f]], [[2xvd|2xvd]], [[4aw5|4aw5]], [[4bb4|4bb4]]</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Receptor_protein-tyrosine_kinase Receptor protein-tyrosine kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.10.1 2.7.10.1] </span></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=2yn8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2yn8 OCA], [http://pdbe.org/2yn8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2yn8 RCSB], [http://www.ebi.ac.uk/pdbsum/2yn8 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2yn8 ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/EPHB4_HUMAN EPHB4_HUMAN]] Receptor tyrosine kinase which binds promiscuously transmembrane ephrin-B family ligands residing on adjacent cells, leading to contact-dependent bidirectional signaling into neighboring cells. The signaling pathway downstream of the receptor is referred to as forward signaling while the signaling pathway downstream of the ephrin ligand is referred to as reverse signaling. Together with its cognate ligand/functional ligand EFNB2 plays a central role in heart morphogenesis and angiogenesis through regulation of cell adhesion and cell migration. EPHB4-mediated forward signaling controls cellular repulsion and segregation form EFNB2-expressing cells. Plays also a role in postnatal blood vessel remodeling, morphogenesis and permeability and is thus important in the context of tumor angiogenesis.<ref>PMID:12734395</ref> <ref>PMID:16424904</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The inability to generate soluble, correctly folded recombinant protein is often a barrier to successful structural and functional studies. Access to affordable synthetic genes has, however, made it possible to design, make and test many more variants of a target protein to identify suitable constructs. We have used rational design and gene synthesis to create a controlled randomised library of the EphB4 receptor tyrosine kinase, with the aim of obtaining soluble, purifiable and active catalytic domain material at multi-milligram levels in Escherichia coli. Three main parameters were tested in designing the library-construct length, functional mutations and stability grafting. These variables were combined to generate a total of 9720 possible variants. The screening of 480 clones generated a 3% hit rate, with a purifiable solubility of up to 15 mg/L for some EphB4 constructs that was largely independent of construct length. Sequencing of the positive clones revealed a pair of hydrophobic core mutations that were key to obtaining soluble material. A minimal kinase domain construct containing these two mutations exhibited a +4.5 degrees C increase in thermal stability over the wild-type protein. These approaches will be broadly applicable for solubility engineering of many different protein target classes. Atomic coordinates and structural factors have been deposited in PDB under the accession 2yn8 (EphB4 HP + staurosporine).

Stability and solubility engineering of the EphB4 tyrosine kinase catalytic domain using a rationally designed synthetic library.,Overman RC, Green I, Truman CM, Read JA, Embrey KJ, McAlister MS, Attwood TK Protein Eng Des Sel. 2013 Oct;26(10):695-704. doi: 10.1093/protein/gzt032. Epub, 2013 Jul 8. PMID:23840071<ref>PMID:23840071</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2yn8" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ephrin receptor|Ephrin receptor]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Human]]
[[Category: Large Structures]]
[[Category: Receptor protein-tyrosine kinase]]
[[Category: Brassington, C A]]
[[Category: Overmann, R]]
[[Category: Read, J]]
[[Category: Transferase]]
[[Category: Unphosphorylated]]