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| | <StructureSection load='3fg4' size='340' side='right'caption='[[3fg4]], [[Resolution|resolution]] 2.31Å' scene=''> | | <StructureSection load='3fg4' size='340' side='right'caption='[[3fg4]], [[Resolution|resolution]] 2.31Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3fg4]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Black_sea_rod Black sea rod]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FG4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3FG4 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3fg4]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Plexaura_homomalla Plexaura homomalla]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FG4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3FG4 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACD:ARACHIDONIC+ACID'>ACD</scene>, <scene name='pdbligand=ACY:ACETIC+ACID'>ACY</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.31Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2fnq|2fnq]], [[3fg1|3fg1]], [[3fg3|3fg3]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACD:ARACHIDONIC+ACID'>ACD</scene>, <scene name='pdbligand=ACY:ACETIC+ACID'>ACY</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Arachidonate_8-lipoxygenase Arachidonate 8-lipoxygenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.13.11.40 1.13.11.40] </span></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=3fg4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fg4 OCA], [https://pdbe.org/3fg4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3fg4 RCSB], [https://www.ebi.ac.uk/pdbsum/3fg4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3fg4 ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3fg4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fg4 OCA], [http://pdbe.org/3fg4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3fg4 RCSB], [http://www.ebi.ac.uk/pdbsum/3fg4 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3fg4 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/AOSL_PLEHO AOSL_PLEHO]] Bifunctional enzyme which is responsible for allene oxide biosynthesis via a two-step reaction which involves conversion of arachidonic acid to a 8R-hydroperoxide intermediate followed by conversion of the hydroperoxide to allene oxide.<ref>PMID:9302294</ref> <ref>PMID:10559269</ref> | + | [https://www.uniprot.org/uniprot/AOSL_PLEHO AOSL_PLEHO] Bifunctional enzyme which is responsible for allene oxide biosynthesis via a two-step reaction which involves conversion of arachidonic acid to a 8R-hydroperoxide intermediate followed by conversion of the hydroperoxide to allene oxide.<ref>PMID:9302294</ref> <ref>PMID:10559269</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Arachidonate 8-lipoxygenase]] | |
| - | [[Category: Black sea rod]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Neau, D B]] | + | [[Category: Plexaura homomalla]] |
| - | [[Category: Newcomer, M E]] | + | [[Category: Neau DB]] |
| - | [[Category: Arichidonic metabolism]] | + | [[Category: Newcomer ME]] |
| - | [[Category: Dioxygenase]]
| + | |
| - | [[Category: Fatty acid biosynthesis]]
| + | |
| - | [[Category: Heme]]
| + | |
| - | [[Category: Iron]]
| + | |
| - | [[Category: Lipid synthesis]]
| + | |
| - | [[Category: Lipoxygenase]]
| + | |
| - | [[Category: Lyase]]
| + | |
| - | [[Category: Membrane]]
| + | |
| - | [[Category: Metal-binding]]
| + | |
| - | [[Category: Multifunctional enzyme]]
| + | |
| - | [[Category: Oxidoreductase]]
| + | |
| - | [[Category: Oxylipin biosynthesis]]
| + | |
| Structural highlights
3fg4 is a 4 chain structure with sequence from Plexaura homomalla. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Method: | X-ray diffraction, Resolution 2.31Å |
| Ligands: | , , , , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
AOSL_PLEHO Bifunctional enzyme which is responsible for allene oxide biosynthesis via a two-step reaction which involves conversion of arachidonic acid to a 8R-hydroperoxide intermediate followed by conversion of the hydroperoxide to allene oxide.[1] [2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Lipoxygenases (LOX) play pivotal roles in the biosynthesis of leukotrienes and other biologically active eicosanoids derived from arachidonic acid. A mechanistic understanding of substrate recognition, when lipoxygenases that recognize the same substrate generate different products, can be used to help guide the design of enzyme-specific inhibitors. We report here the 1.85 A resolution structure of an 8R-lipoxygenase from Plexaura homomalla, an enzyme with a sequence approximately 40% identical to that of human 5-LOX. The structure reveals a U-shaped channel, defined by invariant amino acids, that would allow substrate access to the catalytic iron. We demonstrate that mutations within the channel significantly impact enzyme activity and propose a novel model for substrate binding potentially applicable to other members of this enzyme family.
The 1.85 A structure of an 8R-lipoxygenase suggests a general model for lipoxygenase product specificity.,Neau DB, Gilbert NC, Bartlett SG, Boeglin W, Brash AR, Newcomer ME Biochemistry. 2009 Aug 25;48(33):7906-15. PMID:19594169[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Koljak R, Boutaud O, Shieh BH, Samel N, Brash AR. Identification of a naturally occurring peroxidase-lipoxygenase fusion protein. Science. 1997 Sep 26;277(5334):1994-6. PMID:9302294
- ↑ Boutaud O, Brash AR. Purification and catalytic activities of the two domains of the allene oxide synthase-lipoxygenase fusion protein of the coral Plexaura homomalla. J Biol Chem. 1999 Nov 19;274(47):33764-70. PMID:10559269
- ↑ Neau DB, Gilbert NC, Bartlett SG, Boeglin W, Brash AR, Newcomer ME. The 1.85 A structure of an 8R-lipoxygenase suggests a general model for lipoxygenase product specificity. Biochemistry. 2009 Aug 25;48(33):7906-15. PMID:19594169 doi:10.1021/bi900084m
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