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2toh

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[[Image:2toh.gif|left|200px]]
 
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==TYROSINE HYDROXYLASE CATALYTIC AND TETRAMERIZATION DOMAINS FROM RAT==
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The line below this paragraph, containing "STRUCTURE_2toh", creates the "Structure Box" on the page.
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<StructureSection load='2toh' size='340' side='right'caption='[[2toh]], [[Resolution|resolution]] 2.30&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'>[[2toh]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. The January 2005 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Phenylalanine Hydroxylase'' by Shuchismita Dutta and David S. Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2005_1 10.2210/rcsb_pdb/mom_2005_1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2TOH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2TOH 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]] 2.3&#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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=HBI:7,8-DIHYDROBIOPTERIN'>HBI</scene>, <scene name='pdbligand=MTY:META-TYROSINE'>MTY</scene></td></tr>
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{{STRUCTURE_2toh| PDB=2toh | 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=2toh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2toh OCA], [https://pdbe.org/2toh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2toh RCSB], [https://www.ebi.ac.uk/pdbsum/2toh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2toh ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/TY3H_RAT TY3H_RAT] Plays an important role in the physiology of adrenergic neurons.
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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/to/2toh_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=2toh ConSurf].
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<div style="clear:both"></div>
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'''TYROSINE HYDROXYLASE CATALYTIC AND TETRAMERIZATION DOMAINS FROM RAT'''
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==See Also==
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*[[Monooxygenase 3D structures|Monooxygenase 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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TyrOH is a non-heme iron enzyme which uses molecular oxygen to hydroxylate tyrosine to form L-dihydroxyphenylalanine (L-DOPA), and tetrahydrobiopterin to form 4a-hydroxybiopterin, in the rate-limiting step of the catecholamine biosynthetic pathway. The 2.3 A crystal structure of the catalytic and tetramerization domains of rat tyrosine hydroxylase (TyrOH) in the presence of the cofactor analogue 7,8-dihydrobiopterin and iron shows the mode of pterin binding and the proximity of its hydroxylated 4a carbon to the required iron. The pterin binds on one face of the large active-site cleft, forming an aromatic pi-stacking interaction with Phe300. This phenylalanine residue of TyrOH is found to be hydroxylated in the meta position, most likely through an autocatalytic process, and to consequently form a hydrogen bond to the main-chain carbonyl of Gln310 which anchors Phe300 in the active site. The bound pterin forms hydrogen bonds from N-8 to the main-chain carbonyl of Leu295, from O-4 to Tyr371 and Glu376, from the C-1' OH to the main-chain amides of Leu294 and Leu295, and from the C-2' hydroxyl to an iron-coordinating water. The part of the pterin closest to the iron is the O-4 carbonyl oxygen at a distance of 3.6 A. The iron is 5.6 A from the pterin 4a carbon which is hydroxylated in the enzymatic reaction. No structural changes are observed between the pterin bound and the nonliganded enzyme. On the basis of these structures, molecular oxygen could bind in a bridging position optimally between the pterin C-4a and iron atom prior to substrate hydroxylation. This structure represents the first report of close interactions between pterin and iron in an enzyme active site.
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[[Category: Large Structures]]
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==About this Structure==
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2TOH is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. The following page contains interesting information on the relation of 2TOH with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb61_1.html Phenylalanine Hydroxylase]]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2TOH OCA].
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==Reference==
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Crystal structure of tyrosine hydroxylase with bound cofactor analogue and iron at 2.3 A resolution: self-hydroxylation of Phe300 and the pterin-binding site., Goodwill KE, Sabatier C, Stevens RC, Biochemistry. 1998 Sep 29;37(39):13437-45. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9753429 9753429]
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[[Category: Phenylalanine Hydroxylase]]
[[Category: Phenylalanine Hydroxylase]]
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[[Category: RCSB PDB Molecule of the Month]]
[[Category: Rattus norvegicus]]
[[Category: Rattus norvegicus]]
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[[Category: Single protein]]
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[[Category: Goodwill KE]]
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[[Category: Tyrosine 3-monooxygenase]]
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[[Category: Sabatier C]]
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[[Category: Goodwill, K E.]]
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[[Category: Stevens RC]]
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[[Category: Sabatier, C.]]
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[[Category: Stevens, R C.]]
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[[Category: Catecholamine biosynthesis]]
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[[Category: Hydroxylase]]
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[[Category: Neurotransmitter biosynthesis]]
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[[Category: Non-heme iron]]
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[[Category: Oxidoreductase]]
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[[Category: Pterin co-substrate]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 17:25:29 2008''
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Current revision

TYROSINE HYDROXYLASE CATALYTIC AND TETRAMERIZATION DOMAINS FROM RAT

PDB ID 2toh

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