1loy

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[[Image:1loy.png|left|200px]]
 
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{{STRUCTURE_1loy| PDB=1loy | SCENE= }}
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==X-ray structure of the H40A/E58A mutant of Ribonuclease T1 complexed with 3'-guanosine monophosphate==
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<StructureSection load='1loy' size='340' side='right'caption='[[1loy]], [[Resolution|resolution]] 1.55&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1loy]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Aspergillus_oryzae Aspergillus oryzae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LOY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LOY 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]] 1.55&#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=3GP:GUANOSINE-3-MONOPHOSPHATE'>3GP</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</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=1loy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1loy OCA], [https://pdbe.org/1loy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1loy RCSB], [https://www.ebi.ac.uk/pdbsum/1loy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1loy ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/RNT1_ASPOR RNT1_ASPOR]
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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/lo/1loy_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=1loy 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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Ribonucleases (RNases) catalyze the cleavage of the phosphodiester bond in RNA up to 10(15)-fold, as compared with the uncatalyzed reaction. High resolution crystal structures of these enzymes in complex with 3'-mononucleotide substrates demonstrate the accommodation of the nucleophilic 2'-OH group in a binding pocket comprising the catalytic base (glutamate or histidine) and a charged hydrogen bond donor (lysine or histidine). Ab initio quantum chemical calculations performed on such Michaelis complexes of the mammalian RNase A (EC ) and the microbial RNase T(1) (EC ) show negative charge build up on the 2'-oxygen upon substrate binding. The increased nucleophilicity results from stronger hydrogen bonding to the catalytic base, which is mediated by a hydrogen bond from the charged donor. This hitherto unrecognized catalytic dyad in ribonucleases constitutes a general mechanism for nucleophile activation in both enzymic and RNA-catalyzed phosphoryl transfer reactions.
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===X-ray structure of the H40A/E58A mutant of Ribonuclease T1 complexed with 3'-guanosine monophosphate===
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A nucleophile activation dyad in ribonucleases. A combined X-ray crystallographic/ab initio quantum chemical study.,Mignon P, Steyaert J, Loris R, Geerlings P, Loverix S J Biol Chem. 2002 Sep 27;277(39):36770-4. Epub 2002 Jul 16. PMID:12122018<ref>PMID:12122018</ref>
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{{ABSTRACT_PUBMED_12122018}}
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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 1loy" style="background-color:#fffaf0;"></div>
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[[1loy]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Aspergillus_oryzae Aspergillus oryzae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LOY OCA].
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==See Also==
==See Also==
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*[[Ribonuclease|Ribonuclease]]
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*[[Ribonuclease 3D structures|Ribonuclease 3D structures]]
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:012122018</ref><references group="xtra"/>
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__TOC__
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</StructureSection>
[[Category: Aspergillus oryzae]]
[[Category: Aspergillus oryzae]]
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[[Category: Geerlings, P.]]
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[[Category: Large Structures]]
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[[Category: Loris, R.]]
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[[Category: Geerlings P]]
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[[Category: Loverix, S.]]
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[[Category: Loris R]]
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[[Category: Mignon, P.]]
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[[Category: Loverix S]]
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[[Category: Steyaert, J.]]
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[[Category: Mignon P]]
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[[Category: Ab initio calculation]]
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[[Category: Steyaert J]]
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[[Category: Catalytic dyad]]
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[[Category: Hydrolase]]
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[[Category: Nucleophile activation]]
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[[Category: Rnase]]
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Current revision

X-ray structure of the H40A/E58A mutant of Ribonuclease T1 complexed with 3'-guanosine monophosphate

PDB ID 1loy

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