1b8f

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[[Image:1b8f.png|left|200px]]
 
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{{STRUCTURE_1b8f| PDB=1b8f | SCENE= }}
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==Histidine ammonia-lyase (HAL) from Pseudomonas putida==
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<StructureSection load='1b8f' size='340' side='right'caption='[[1b8f]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1b8f]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_putida Pseudomonas putida]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B8F OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1B8F FirstGlance]. <br>
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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]] 2.1&#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=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MDO:{2-[(1S)-1-AMINOETHYL]-4-METHYLIDENE-5-OXO-4,5-DIHYDRO-1H-IMIDAZOL-1-YL}ACETIC+ACID'>MDO</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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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=1b8f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b8f OCA], [https://pdbe.org/1b8f PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1b8f RCSB], [https://www.ebi.ac.uk/pdbsum/1b8f PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1b8f ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/HUTH_PSEPU HUTH_PSEPU]
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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/b8/1b8f_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1b8f ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Histidine ammonia-lyase (EC 4.3.1.3) catalyzes the nonoxidative elimination of the alpha-amino group of histidine and is closely related to the important plant enzyme phenylalanine ammonia-lyase. The crystal structure of histidase from Pseudomonas putida was determined at 2.1 A resolution revealing a homotetramer with D2 symmetry, the molecular center of which is formed by 20 nearly parallel alpha-helices. The chain fold, but not the sequence, resembles those of fumarase C and related proteins. The structure shows that the reactive electrophile is a 4-methylidene-imidazole-5-one, which is formed autocatalytically by cyclization and dehydration of residues 142-144 with the sequence Ala-Ser-Gly. With respect to the first dehydration step, this modification resembles the chromophore of the green fluorescent protein. The active center is clearly established by the modification and by mutations. The observed geometry allowed us to model the bound substrate at a high confidence level. A reaction mechanism is proposed.
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===Histidine ammonia-lyase (HAL) from Pseudomonas putida===
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Crystal structure of histidine ammonia-lyase revealing a novel polypeptide modification as the catalytic electrophile.,Schwede TF, Retey J, Schulz GE Biochemistry. 1999 Apr 27;38(17):5355-61. PMID:10220322<ref>PMID:10220322</ref>
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{{ABSTRACT_PUBMED_10220322}}
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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==About this Structure==
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<div class="pdbe-citations 1b8f" style="background-color:#fffaf0;"></div>
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[[1b8f]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Pseudomonas_putida Pseudomonas putida]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B8F OCA].
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== References ==
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<references/>
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==Reference==
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__TOC__
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<ref group="xtra">PMID:010220322</ref><ref group="xtra">PMID:015548745</ref><references group="xtra"/>
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</StructureSection>
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[[Category: Histidine ammonia-lyase]]
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[[Category: Large Structures]]
[[Category: Pseudomonas putida]]
[[Category: Pseudomonas putida]]
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[[Category: Schulz, G E.]]
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[[Category: Schulz GE]]
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[[Category: Schwede, T F.]]
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[[Category: Schwede TF]]
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[[Category: Ammonia-lyase]]
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[[Category: Histidine degradation]]
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[[Category: Lyase]]
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Current revision

Histidine ammonia-lyase (HAL) from Pseudomonas putida

PDB ID 1b8f

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