1fj2

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[[Image:1fj2.gif|left|200px]]<br /><applet load="1fj2" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1fj2, resolution 1.5&Aring;" />
 
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'''Crystal structure of the human acyl protein thioesterase 1 at 1.5 A resolution'''<br />
 
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==Overview==
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==Crystal structure of the human acyl protein thioesterase 1 at 1.5 A resolution==
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BACKGROUND: Many proteins undergo posttranslational modifications involving covalent attachment of lipid groups. Among them is palmitoylation, a dynamic, reversible process that affects trimeric G proteins and Ras and constitutes a regulatory mechanism for signal transduction pathways. Recently, an acylhydrolase previously identified as lysophospholipase has been shown to function as an acyl protein thioesterase, which catalyzes depalmitoylation of Galpha proteins as well as Ras. Its amino acid sequence suggested that the protein is evolutionarily related to neutral lipases and other thioesterases, but direct structural information was not available. RESULTS: We have solved the crystal structure of the human putative Galpha-regulatory protein acyl thioesterase (hAPT1) with a single data set collected from a crystal containing the wild-type protein. The phases were calculated to 1.8 A resolution based on anomalous scattering from Br(-) ions introduced in the cryoprotectant solution in which the crystal was soaked for 20 s. The model was refined against data extending to a resolution of 1.5 A to an R factor of 18.6%. The enzyme is a member of the ubiquitous alpha/beta hydrolase family, which includes other acylhydrolases such as the palmitoyl protein thioesterase (PPT1). CONCLUSIONS: The human APT1 is closely related to a previously described carboxylesterase from Pseudomonas fluorescens. The active site contains a catalytic triad of Ser-114, His-203, and Asp-169. Like carboxylesterase, hAPT1 appears to be dimeric, although the mutual disposition of molecules in the two dimers differs. Unlike carboxylesterase, the substrate binding pocket and the active site of hAPT1 are occluded by the dimer interface, suggesting that the enzyme must dissociate upon interaction with substrate.
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<StructureSection load='1fj2' size='340' side='right'caption='[[1fj2]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1fj2]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FJ2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FJ2 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]] 1.5&#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=BR:BROMIDE+ION'>BR</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=1fj2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fj2 OCA], [https://pdbe.org/1fj2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1fj2 RCSB], [https://www.ebi.ac.uk/pdbsum/1fj2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1fj2 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/LYPA1_HUMAN LYPA1_HUMAN] Hydrolyzes fatty acids from S-acylated cysteine residues in proteins such as trimeric G alpha proteins or HRAS. Has depalmitoylating activity and also low lysophospholipase activity.<ref>PMID:20418879</ref>
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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/fj/1fj2_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=1fj2 ConSurf].
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<div style="clear:both"></div>
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==Disease==
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==See Also==
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Known diseases associated with this structure: Autoimmune lymphoproliferative syndrome OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=134637 134637]], Autoimmune lymphoproliferative syndrome, type IA OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=134637 134637]], Squamous cell carcinoma, burn scar-related, somatic OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=134637 134637]]
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*[[Thioesterase 3D structures|Thioesterase 3D structures]]
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== References ==
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==About this Structure==
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<references/>
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1FJ2 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=BR:'>BR</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Alkylglycerophosphoethanolamine_phosphodiesterase Alkylglycerophosphoethanolamine phosphodiesterase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.4.39 3.1.4.39] Known structural/functional Sites: <scene name='pdbsite=ACA:Active+Site+In+Chain+A'>ACA</scene> and <scene name='pdbsite=ACB:Active+Site+In+Chain+B'>ACB</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FJ2 OCA].
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__TOC__
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</StructureSection>
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==Reference==
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Crystal structure of the human acyl protein thioesterase I from a single X-ray data set to 1.5 A., Devedjiev Y, Dauter Z, Kuznetsov SR, Jones TL, Derewenda ZS, Structure. 2000 Nov 15;8(11):1137-46. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11080636 11080636]
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[[Category: Alkylglycerophosphoethanolamine phosphodiesterase]]
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[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Dauter, Z.]]
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[[Category: Dauter Z]]
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[[Category: Derewenda, Z.]]
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[[Category: Derewenda Z]]
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[[Category: Devedjiev, Y.]]
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[[Category: Devedjiev Y]]
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[[Category: Jones, T.]]
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[[Category: Jones T]]
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[[Category: Kuznetsov, S.]]
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[[Category: Kuznetsov S]]
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[[Category: BR]]
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[[Category: alpha/beta hydrolase]]
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[[Category: anomalous diffraction]]
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[[Category: sad]]
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[[Category: serine hydrolase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:39:10 2008''
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Current revision

Crystal structure of the human acyl protein thioesterase 1 at 1.5 A resolution

PDB ID 1fj2

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