View source for 3fiv


==CRYSTAL STRUCTURE OF FELINE IMMUNODEFICIENCY VIRUS PROTEASE COMPLEXED WITH A SUBSTRATE==
<StructureSection load='3fiv' size='340' side='right'caption='[[3fiv]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3fiv]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Feline_immunodeficiency_virus Feline immunodeficiency virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FIV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3FIV 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=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=ALN:NAPHTHALEN-2-YL-3-ALANINE'>ALN</scene>, <scene name='pdbligand=CSD:3-SULFINOALANINE'>CSD</scene>, <scene name='pdbligand=NH2:AMINO+GROUP'>NH2</scene>, <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=3fiv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fiv OCA], [https://pdbe.org/3fiv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3fiv RCSB], [https://www.ebi.ac.uk/pdbsum/3fiv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3fiv ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/POL_FIVPE POL_FIVPE] During replicative cycle of retroviruses, the reverse-transcribed viral DNA is integrated into the host chromosome by the viral integrase enzyme. RNase H activity is associated with the reverse transcriptase.
== 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/fi/3fiv_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=3fiv ConSurf].
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== Publication Abstract from PubMed ==
Crystal structures of complexes of a D30N mutant of feline immunodeficiency virus protease (FIV PR) complexed with a statine-based inhibitor (LP-149), as well as with a substrate based on a modification of this inhibitor (LP-149S), have been solved and refined at resolutions of 2.0 and 1.85 A, respectively. Both the inhibitor and the substrate are bound in the active site of the mutant protease in a similar mode, which also resembles the mode of binding of LP-149 to the native protease. The carbonyl oxygen of the scissile bond in the substrate is not hydrated and is located within the distance of a hydrogen bond to an amido nitrogen atom from one of the two asparagines in the active site of the enzyme. The nitrogen atom of the scissile bond is 3.25 A from the conserved water molecule (Wat301). A model of a tetrahedral intermediate bound to the active site of the native enzyme was built by considering the interactions observed in all three crystal structures of FIV PR. Molecular dynamics simulations of this model bound to native wild-type FIV PR were carried out, to investigate the final stages of the catalytic mechanism of aspartic proteases.

Crystal structures of the inactive D30N mutant of feline immunodeficiency virus protease complexed with a substrate and an inhibitor.,Laco GS, Schalk-Hihi C, Lubkowski J, Morris G, Zdanov A, Olson A, Elder JH, Wlodawer A, Gustchina A Biochemistry. 1997 Sep 2;36(35):10696-708. PMID:9271500<ref>PMID:9271500</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 3fiv" style="background-color:#fffaf0;"></div>

==See Also==
*[[Immunodeficiency virus protease 3D structures|Immunodeficiency virus protease 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Feline immunodeficiency virus]]
[[Category: Large Structures]]
[[Category: Gustchina A]]
[[Category: Lubkowski J]]
[[Category: Schalk-Hihi C]]
[[Category: Wlodawer A]]
[[Category: Zdanov A]]