1beu

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[[Image:1beu.gif|left|200px]]
 
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==TRP SYNTHASE (D60N-IPP-SER) WITH K+==
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The line below this paragraph, containing "STRUCTURE_1beu", creates the "Structure Box" on the page.
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<StructureSection load='1beu' size='340' side='right'caption='[[1beu]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1beu]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Salmonella_enterica_subsp._enterica_serovar_Typhimurium Salmonella enterica subsp. enterica serovar Typhimurium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BEU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1BEU FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 1.9&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IPL:INDOLE-3-PROPANOL+PHOSPHATE'>IPL</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=PLS:[3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YLMETHYL]-SERINE'>PLS</scene></td></tr>
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{{STRUCTURE_1beu| PDB=1beu | SCENE= }}
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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=1beu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1beu OCA], [https://pdbe.org/1beu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1beu RCSB], [https://www.ebi.ac.uk/pdbsum/1beu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1beu ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/TRPA_SALTY TRPA_SALTY] The alpha subunit is responsible for the aldol cleavage of indoleglycerol phosphate to indole and glyceraldehyde 3-phosphate.
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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/be/1beu_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=1beu ConSurf].
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<div style="clear:both"></div>
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'''TRP SYNTHASE (D60N-IPP-SER) WITH K+'''
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==See Also==
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*[[Tryptophan synthase 3D structures|Tryptophan synthase 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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We have investigated the role of Asp60 of the alpha-subunit in allosteric communication between the tryptophan synthase alpha- and beta-subunits. Crystallographic and microspectrophotometric studies have been carried out on a mutant (alpha D60N) tryptophan synthase alpha 2 beta 2 complex which has no observable alpha-activity, but has substantial beta-activity. Single-crystal polarized absorption spectra indicate that the external aldimine is the predominant L-serine intermediate and that the amount of the intermediate formed is independent of pH, monovalent cations, and allosteric effectors. The three-dimensional structure is reported for this mutant enzyme complexed with indole 3-propanol phosphate bound to the alpha-site and L-serine bound to the beta-site (alpha D60N-IPP-Ser), and this structure is compared with that of the unliganded mutant enzyme (alpha D60N). In the complex, L-serine forms a stable external aldimine with the pyridoxal phosphate coenzyme at the active site of the beta-subunit. The conformation of the unliganded mutant is almost identical to that of the wild type enzyme. However, the structure of the mutant complexed with IPP and serine exhibits ligand-induced conformational changes much smaller than those observed previously for another mutant enzyme in the presence of the same ligands (beta K87T-IPP-Ser) [Rhee, S., Parris, K. D., Hyde, C. C., Ahmed, S. A., Miles, E. W., and Davies, D. R. (1997) Biochemistry 36, 7664-7680]. The alpha D60N-IPP-Ser alpha 2 beta 2 complex does not undergo the following ligand-induced conformational changes: (1) the closure of the alpha-subunit loop 6 (residues 178-191), (2) the movement of the mobile subdomain (residues 93-189) of the beta-subunit, and (3) the rotation of the alpha-subunit relative to the beta-subunit. These observations show that alpha Asp60 plays important roles in the closure of loop 6 and in allosteric communication between the alpha- and beta-subunits.
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[[Category: Large Structures]]
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[[Category: Salmonella enterica subsp. enterica serovar Typhimurium]]
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==About this Structure==
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[[Category: Davies DR]]
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1BEU is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Salmonella_typhimurium Salmonella typhimurium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BEU OCA].
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[[Category: Miles EW]]
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[[Category: Mozzarelli A]]
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==Reference==
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[[Category: Rhee S]]
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Cryocrystallography and microspectrophotometry of a mutant (alpha D60N) tryptophan synthase alpha 2 beta 2 complex reveals allosteric roles of alpha Asp60., Rhee S, Miles EW, Mozzarelli A, Davies DR, Biochemistry. 1998 Jul 28;37(30):10653-9. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9692955 9692955]
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[[Category: Protein complex]]
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[[Category: Salmonella typhimurium]]
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[[Category: Tryptophan synthase]]
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[[Category: Davies, D R.]]
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[[Category: Miles, E W.]]
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[[Category: Mozzarelli, A.]]
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[[Category: Rhee, S.]]
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[[Category: Carbon-oxygen lyase]]
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[[Category: Indole-3-propanol phosphate in a-subunit]]
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[[Category: L-serine in b-subunit]]
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[[Category: Mutation d60n in a-subunit]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 11:25:33 2008''
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Current revision

TRP SYNTHASE (D60N-IPP-SER) WITH K+

PDB ID 1beu

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