|
|
| Line 3: |
Line 3: |
| | <StructureSection load='1v7l' size='340' side='right'caption='[[1v7l]], [[Resolution|resolution]] 1.98Å' scene=''> | | <StructureSection load='1v7l' size='340' side='right'caption='[[1v7l]], [[Resolution|resolution]] 1.98Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1v7l]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Pyrococcus_horikoshii Pyrococcus horikoshii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1V7L OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1V7L FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1v7l]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pyrococcus_horikoshii_OT3 Pyrococcus horikoshii OT3]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1V7L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1V7L FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PH1724 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=70601 Pyrococcus horikoshii])</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]] 1.98Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/3-isopropylmalate_dehydratase 3-isopropylmalate dehydratase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.33 4.2.1.33] </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=1v7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1v7l OCA], [https://pdbe.org/1v7l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1v7l RCSB], [https://www.ebi.ac.uk/pdbsum/1v7l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1v7l ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1v7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1v7l OCA], [http://pdbe.org/1v7l PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1v7l RCSB], [http://www.ebi.ac.uk/pdbsum/1v7l PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1v7l ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/LEUD_PYRHO LEUD_PYRHO]] Catalyzes the isomerization between 2-isopropylmalate and 3-isopropylmalate, via the formation of 2-isopropylmaleate (By similarity). | + | [https://www.uniprot.org/uniprot/LEUD_PYRHO LEUD_PYRHO] Catalyzes the isomerization between 2-isopropylmalate and 3-isopropylmalate, via the formation of 2-isopropylmaleate (By similarity). |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
| Line 37: |
Line 36: |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: 3-isopropylmalate dehydratase]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Pyrococcus horikoshii]] | + | [[Category: Pyrococcus horikoshii OT3]] |
| - | [[Category: Kirita, T]] | + | [[Category: Kirita T]] |
| - | [[Category: Sakai, N]] | + | [[Category: Sakai N]] |
| - | [[Category: Tanaka, I]] | + | [[Category: Tanaka I]] |
| - | [[Category: Yao, M]] | + | [[Category: Yao M]] |
| - | [[Category: Beta barrel]]
| + | |
| - | [[Category: Lyase]]
| + | |
| Structural highlights
Function
LEUD_PYRHO Catalyzes the isomerization between 2-isopropylmalate and 3-isopropylmalate, via the formation of 2-isopropylmaleate (By similarity).
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
Recent studies have implied that the isopropylmalate isomerase small subunit of the hyperthermophilic archaea Pyrococcus horikoshii (PhIPMI-s) functions as isopropylmalate isomerase in the leucine biosynthesis pathway, and as homoaconitase (HACN) in the lysine biosynthesis pathway via alpha-aminoadipic acid. PhIPMI is thus considered a key to understanding the fundamental metabolism of the earliest organisms. We describe for the first time the crystal structure of PhIPMI-s, which displays dual substrate specificity. The crystal structure unexpectedly shows that four molecules create an interlocked assembly with intermolecular disulfide linkages having a skewed 222 point-group symmetry. Although the overall fold of the PhIPMI-s monomer is related closely to domain 4 of the aconitase (ACN), one alpha-helix in the ACN structure is replaced by a short loop with relatively high temperature factor values. Because this region is essential for discriminating the structurally similar substrate based on interactions with its diversified gamma-moiety, the loop structure in the PhIPMI-s must be dependent on the presence of a substrate. The flexibility of the loop region might be a structural basis for recognizing both hydrophobic and hydrophilic gamma-moieties of two distinct substrates, isopropylmalate and homocitrate.
Crystal structure of the Pyrococcus horikoshii isopropylmalate isomerase small subunit provides insight into the dual substrate specificity of the enzyme.,Yasutake Y, Yao M, Sakai N, Kirita T, Tanaka I J Mol Biol. 2004 Nov 19;344(2):325-33. PMID:15522288[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Yasutake Y, Yao M, Sakai N, Kirita T, Tanaka I. Crystal structure of the Pyrococcus horikoshii isopropylmalate isomerase small subunit provides insight into the dual substrate specificity of the enzyme. J Mol Biol. 2004 Nov 19;344(2):325-33. PMID:15522288 doi:10.1016/j.jmb.2004.09.035
|
