View source for 1fxy


==COAGULATION FACTOR XA-TRYPSIN CHIMERA INHIBITED WITH D-PHE-PRO-ARG-CHLOROMETHYLKETONE==
<StructureSection load='1fxy' size='340' side='right'caption='[[1fxy]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1fxy]] 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=1FXY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FXY 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]] 2.15&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=0G6:D-PHENYLALANYL-N-[(2S,3S)-6-{[AMINO(IMINIO)METHYL]AMINO}-1-CHLORO-2-HYDROXYHEXAN-3-YL]-L-PROLINAMIDE'>0G6</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=1fxy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fxy OCA], [https://pdbe.org/1fxy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1fxy RCSB], [https://www.ebi.ac.uk/pdbsum/1fxy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1fxy ProSAT]</span></td></tr>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/TRY1_HUMAN TRY1_HUMAN] Defects in PRSS1 are a cause of pancreatitis (PCTT) [MIM:[https://omim.org/entry/167800 167800]. A disease characterized by the presence of calculi in pancreatic ducts. It causes severe abdominal pain attacks.<ref>PMID:10930381</ref> <ref>PMID:8841182</ref> <ref>PMID:11866271</ref> <ref>PMID:9322498</ref> <ref>PMID:9633818</ref> <ref>PMID:10381903</ref> <ref>PMID:10204851</ref> <ref>PMID:11073545</ref> <ref>PMID:11788572</ref> <ref>PMID:14695529</ref> <ref>PMID:15776435</ref> 
== Function ==
[https://www.uniprot.org/uniprot/TRY1_HUMAN TRY1_HUMAN] Has activity against the synthetic substrates Boc-Phe-Ser-Arg-Mec, Boc-Leu-Thr-Arg-Mec, Boc-Gln-Ala-Arg-Mec and Boc-Val-Pro-Arg-Mec. The single-chain form is more active than the two-chain form against all of these substrates.<ref>PMID:7945238</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/fx/1fxy_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1fxy ConSurf].
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<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Protein functions have evolved in part via domain recombination events. Such events, for example, recombine structurally independent functional domains and shuffle targeting, regulatory, and/or catalytic functions. Domain recombination, however, can generate new functions, as implied by the observation of catalytic sites at interfaces of distinct folding domains. If useful to an evolving organism, such initially rudimentary functions would likely acquire greater efficiency and diversity, whereas the initially distinct folding domains would likely develop into single functional domains. This represents the probable evolution of the S1 serine protease family, whose two homologous beta-barrel subdomains assemble to form the binding sites and the catalytic machinery. Among S1 family members, the contact interface and catalytic residues are highly conserved whereas surrounding surfaces are highly variable. This observation suggests a new strategy to engineer viable proteins with novel properties, by swapping folding subdomains chosen from among protein family members. Such hybrid proteins would retain properties conserved throughout the family, including folding stability as single domain proteins, while providing new surfaces amenable to directed evolution or engineering of specific new properties. We show here that recombining the N-terminal subdomain from coagulation factor X with the C-terminal subdomain from trypsin creates a potent enzyme (fXYa) with novel properties, in particular a broad substrate specificity. As shown by the 2.15-A crystal structure, plasticity at the hydrophobic subdomain interface maintains activity, while surface loops are displaced compared with the parent subdomains. fXYa thus represents a new serine proteinase lineage with hybrid fX, trypsin, and novel properties.

New enzyme lineages by subdomain shuffling.,Hopfner KP, Kopetzki E, Kresse GB, Bode W, Huber R, Engh RA Proc Natl Acad Sci U S A. 1998 Aug 18;95(17):9813-8. PMID:9707558<ref>PMID:9707558</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 1fxy" style="background-color:#fffaf0;"></div>

==See Also==
*[[Factor Xa|Factor Xa]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Bode W]]
[[Category: Engh RA]]
[[Category: Hopfner KP]]
[[Category: Huber R]]
[[Category: Kopetzki E]]
[[Category: Kresse G-B]]