View source for 2hft


==THE CRYSTAL STRUCTURE OF THE EXTRACELLULAR DOMAIN OF HUMAN TISSUE FACTOR AT 1.7 ANGSTROMS RESOLUTION==
<StructureSection load='2hft' size='340' side='right'caption='[[2hft]], [[Resolution|resolution]] 1.69&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2hft]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1hft 1hft]. The March 2006 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Tissue Factor''  by David S. Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2006_3 10.2210/rcsb_pdb/mom_2006_3]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HFT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2HFT FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=2hft FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hft OCA], [https://pdbe.org/2hft PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2hft RCSB], [https://www.ebi.ac.uk/pdbsum/2hft PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2hft ProSAT]</span></td></tr>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/TF_HUMAN TF_HUMAN]] Initiates blood coagulation by forming a complex with circulating factor VII or VIIa. The [TF:VIIa] complex activates factors IX or X by specific limited protolysis. TF plays a role in normal hemostasis by initiating the cell-surface assembly and propagation of the coagulation protease cascade.<ref>PMID:12652293</ref>  
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hf/2hft_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2hft ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
Exposure of blood to cells expressing tissue factor results in formation of a high-affinity complex with factor VIIa, initiating the extrinsic pathway of blood coagulation by the activation of factors IX and X. The structure of the extracellular portion of tissue factor was refined to a crystallographic R-value of 20.4% to a resolution of 1.69 A against synchroton data collected from a flash-frozen crystal. The structure consists of two fibronectin type III modules whose hydrophobic cores merge in the domain-domain interface, suggesting that the extracellular portion serves as a relatively rigid template for factor VIIa binding. Analysis of the hydrophobic core of each individual module identifies a cluster of residues forming a packing motif centered on Trp25 which appears to be characteristic for fibronectin type III modules. Comparison of the structure to that of the human growth hormone receptor, which belongs to a different class (class I) of the same cytokine receptor superfamily, shows that the structure of the individual domains is very similar but that the relative domain-domain orientation differs greatly. Even though the WSXWS box characteristic of the class I cytokine receptors is not present in tissue factor, the analogous residues have the identical polyproline helical conformation. Mapping of residues important for biological activity on the structure shows that all these are located on Beta-strands in a small number of distinct clusters, on the opposite side of the molecule compared to the ligand binding determinants of the growth hormone receptor.

The crystal structure of the extracellular domain of human tissue factor refined to 1.7 A resolution.,Muller YA, Ultsch MH, de Vos AM J Mol Biol. 1996 Feb 16;256(1):144-59. PMID:8609606<ref>PMID:8609606</ref>

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

==See Also==
*[[Tissue factor|Tissue factor]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Human]]
[[Category: Large Structures]]
[[Category: RCSB PDB Molecule of the Month]]
[[Category: Tissue Factor]]
[[Category: Muller, Y A]]
[[Category: Vos, A M.De]]
[[Category: Coagulation factor]]