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1osj

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[[Image:1osj.jpg|left|200px]]
 
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{{Structure
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==STRUCTURE OF 3-ISOPROPYLMALATE DEHYDROGENASE==
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|PDB= 1osj |SIZE=350|CAPTION= <scene name='initialview01'>1osj</scene>, resolution 2.35&Aring;
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<StructureSection load='1osj' size='340' side='right'caption='[[1osj]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND=
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<table><tr><td colspan='2'>[[1osj]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus_HB8 Thermus thermophilus HB8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OSJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1OSJ FirstGlance]. <br>
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|ACTIVITY= [http://en.wikipedia.org/wiki/3-isopropylmalate_dehydrogenase 3-isopropylmalate dehydrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.85 1.1.1.85]
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.35&#8491;</td></tr>
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|GENE=
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1osj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1osj OCA], [https://pdbe.org/1osj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1osj RCSB], [https://www.ebi.ac.uk/pdbsum/1osj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1osj ProSAT]</span></td></tr>
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}}
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/LEU3_THET8 LEU3_THET8] Catalyzes the oxidation of 3-carboxy-2-hydroxy-4-methylpentanoate (3-isopropylmalate) to 3-carboxy-4-methyl-2-oxopentanoate. The product decarboxylates to 4-methyl-2 oxopentanoate.[HAMAP-Rule:MF_01033]
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/os/1osj_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1osj ConSurf].
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<div style="clear:both"></div>
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'''STRUCTURE OF 3-ISOPROPYLMALATE DEHYDROGENASE'''
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==See Also==
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*[[Isopropylmalate dehydrogenase|Isopropylmalate dehydrogenase]]
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__TOC__
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==Overview==
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</StructureSection>
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The structure of a thermostable Ala172Leu mutant, designated A172L, of 3-isopropylmalate dehydrogenase from Thermus thermophilus was determined. The crystal belongs to space group P2(1), with cell parameters a = 55.5 A, b = 88.1 A, c = 72.0 A and beta = 100.9 degrees. There is one dimer in each asymmetric unit. The final R factor is 17.8% with 69 water molecules at 2.35 A resolution. The mutation is located at the interface between domains and the C alpha trace of the mutant structure deviates from that of the native structure by as much as 1.7 A, while the structure of each domain barely changes. The mutant enzyme has a more closed conformation compared with the wild-type enzyme as a result of the replacement of Ala with Leu at residue 172. These structural variations were found independent of the crystal packing, because the structure of wild type was the same in crystals obtained in different precipitants. The hinge regions for the movement of domains are located around the active cleft of the enzyme, an observation that implies that the mobility of domains around the hinge is indispensable for the activity of the enzyme. The larger side chain at the mutated site contributed to the thermostability of the mutant protein by enhancing the local packing of side chains, and also by shifting the backbone of the opposing domain.
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[[Category: Large Structures]]
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[[Category: Thermus thermophilus HB8]]
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==About this Structure==
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[[Category: Akanuma S]]
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1OSJ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OSJ OCA].
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[[Category: Moriyama H]]
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[[Category: Oshima T]]
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==Reference==
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[[Category: Qu C]]
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A mutation at the interface between domains causes rearrangement of domains in 3-isopropylmalate dehydrogenase., Qu C, Akanuma S, Moriyama H, Tanaka N, Oshima T, Protein Eng. 1997 Jan;10(1):45-52. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9051733 9051733]
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[[Category: Tanaka N]]
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[[Category: 3-isopropylmalate dehydrogenase]]
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[[Category: Single protein]]
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[[Category: Thermus thermophilus]]
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[[Category: Akanuma, S.]]
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[[Category: Moriyama, H.]]
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[[Category: Oshima, T.]]
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[[Category: Qu, C.]]
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[[Category: Tanaka, N.]]
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[[Category: dehydrogenase]]
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[[Category: oxidoreductase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 13:15:03 2008''
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Current revision

STRUCTURE OF 3-ISOPROPYLMALATE DEHYDROGENASE

PDB ID 1osj

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