View source for 3ofw


==Crystal structure of recombinant Kunitz Type serine protease Inhibitor-1 from the Carribean sea anemone stichodactyla helianthus==
<StructureSection load='3ofw' size='340' side='right'caption='[[3ofw]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3ofw]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Stichodactyla_helianthus Stichodactyla helianthus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3OFW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3OFW 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]] 2.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</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=3ofw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ofw OCA], [https://pdbe.org/3ofw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ofw RCSB], [https://www.ebi.ac.uk/pdbsum/3ofw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ofw ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/VKT1_STIHL VKT1_STIHL] Active against serine, cysteine, and aspartic proteases. Can bind vertebrate trypsin and chymotrypsin.<ref>PMID:22975140</ref> <ref>PMID:9027993</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The BPTI/Kunitz-type inhibitor family includes several extremely potent serine protease inhibitors. To date, the inhibitory mechanisms have only been studied for mammalian inhibitors. Here, the first crystal structure of a BPTI/Kunitz-type inhibitor from a marine invertebrate (rShPI-1A) is reported to 2.5 A resolution. Crystallization of recombinant rShPI-1A required the salt-induced dissociation of a trypsin complex that was previously formed to avoid intrinsic inhibitor aggregates in solution. The rShPI-1A structure is similar to the NMR structure of the molecule purified from the natural source, but allowed the assignment of disulfide-bridge chiralities and the detection of an internal stabilizing water network. A structural comparison with other BPTI/Kunitz-type canonical inhibitors revealed unusual varphi angles at positions 17 and 30 to be a particular characteristic of the family. A significant clustering of varphi and psi angle values in the glycine-rich remote fragment near the secondary binding loop was additionally identified, but its impact on the specificity of rShPI-1A and similar molecules requires further study.

Structure of the recombinant BPTI/Kunitz-type inhibitor rShPI-1A from the marine invertebrate Stichodactyla helianthus.,Garcia-Fernandez R, Pons T, Meyer A, Perbandt M, Gonzalez-Gonzalez Y, Gil D, de los Angeles Chavez M, Betzel C, Redecke L Acta Crystallogr Sect F Struct Biol Cryst Commun. 2012 Nov 1;68(Pt 11):1289-93., doi: 10.1107/S1744309112039085. Epub 2012 Oct 26. PMID:23143234<ref>PMID:23143234</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3ofw" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Stichodactyla helianthus]]
[[Category: Betzel C]]
[[Category: Garcia-Fernandez R]]
[[Category: Gil D]]
[[Category: Gonzalez Y]]
[[Category: Perbandt M]]
[[Category: Pons T]]
[[Category: Redecke L]]
[[Category: Talavera A]]
[[Category: De los Angeles Chavez M]]