View source for 2anw


==Expression, crystallization and three-dimensional structure of the catalytic domain of human plasma kallikrein: Implications for structure-based design of protease inhibitors==
<StructureSection load='2anw' size='340' side='right'caption='[[2anw]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2anw]] 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=2ANW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2ANW 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]] 1.85&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BEN:BENZAMIDINE'>BEN</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=2anw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2anw OCA], [https://pdbe.org/2anw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2anw RCSB], [https://www.ebi.ac.uk/pdbsum/2anw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2anw ProSAT]</span></td></tr>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/KLKB1_HUMAN KLKB1_HUMAN] Defects in KLKB1 are the cause of prekallikrein deficiency (PKK deficiency) [MIM:[https://omim.org/entry/612423 612423]; also known as Fletcher factor deficiency. This disorder is a blood coagulation defect.
== Function ==
[https://www.uniprot.org/uniprot/KLKB1_HUMAN KLKB1_HUMAN] The enzyme cleaves Lys-Arg and Arg-Ser bonds. It activates, in a reciprocal reaction, factor XII after its binding to a negatively charged surface. It also releases bradykinin from HMW kininogen and may also play a role in the renin-angiotensin system by converting prorenin into renin.
== 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/an/2anw_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=2anw ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
Plasma kallikrein is a serine protease that has many important functions, including modulation of blood pressure, complement activation, and mediation and maintenance of inflammatory responses. Although plasma kallikrein has been purified for 40 years, its structure has not been elucidated. In this report, we described two systems (Pichia pastoris and baculovirus/Sf9 cells) for expression of the protease domain of plasma kallikrein, along with the purification and high resolution crystal structures of the two recombinant forms. In the Pichia pastoris system, the protease domain was expressed as a heterogeneously glycosylated zymogen that was activated by limited trypsin digestion and treated with endoglycosidase H deglycosidase to reduce heterogeneity from the glycosylation. The resulting protein was chromatographically resolved into four components, one of which was crystallized. In the baculovirus/Sf9 system, homogeneous, crystallizable, and nonglycosylated protein was expressed after mutagenizing three asparagines (the glycosylation sites) to glutamates. When assayed against the peptide substrates, pefachrome-PK and oxidized insulin B chain, both forms of the protease domain were found to have catalytic activity similar to that of the full-length protein. Crystallization and x-ray crystal structure determination of both forms have yielded the first three-dimensional views of the catalytic domain of plasma kallikrein. The structures, determined at 1.85 A for the endoglycosidase H-deglycosylated protease domain produced from P. pastoris and at 1.40 A for the mutagenically deglycosylated form produced from Sf9 cells, show that the protease domain adopts a typical chymotrypsin-like serine protease conformation. The structural information provides insights into the biochemical and enzymatic properties of plasma kallikrein and paves the way for structure-based design of protease inhibitors that are selective either for or against plasma kallikrein.

Expression, crystallization, and three-dimensional structure of the catalytic domain of human plasma kallikrein.,Tang J, Yu CL, Williams SR, Springman E, Jeffery D, Sprengeler PA, Estevez A, Sampang J, Shrader W, Spencer J, Young W, McGrath M, Katz BA J Biol Chem. 2005 Dec 9;280(49):41077-89. Epub 2005 Sep 30. PMID:16199530<ref>PMID:16199530</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 2anw" style="background-color:#fffaf0;"></div>

==See Also==
*[[Kallikrein 3D structures|Kallikrein 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Estevez A]]
[[Category: Jeffery D]]
[[Category: Katz BA]]
[[Category: McGrath ME]]
[[Category: Sampang J]]
[[Category: Shrader W]]
[[Category: Spencer JR]]
[[Category: Sprengeler PA]]
[[Category: Springman E]]
[[Category: Tang J]]
[[Category: Williams SR]]
[[Category: Young WB]]
[[Category: Yu CL]]