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[[Image:1lov.png|left|200px]]
==X-ray structure of the E58A mutant of Ribonuclease T1 complexed with 3'-guanosine monophosphate==
<StructureSection load='1lov' size='340' side='right' caption='[[1lov]], [[Resolution|resolution]] 1.55&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1lov]] 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=1LOV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1LOV FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=3GP:GUANOSINE-3-MONOPHOSPHATE'>3GP</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene><br>
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1rga|1rga]], [[1rls|1rls]], [[1low|1low]], [[1loy|1loy]]</td></tr>
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Ribonuclease_T(1) Ribonuclease T(1)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.27.3 3.1.27.3] </span></td></tr>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1lov FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lov OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1lov RCSB], [http://www.ebi.ac.uk/pdbsum/1lov PDBsum]</span></td></tr>
<table>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/lo/1lov_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
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.


{{STRUCTURE_1lov|  PDB=1lov  |  SCENE=  }}
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>


===X-ray structure of the E58A mutant of Ribonuclease T1 complexed with 3'-guanosine monophosphate===
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 
</div>
{{ABSTRACT_PUBMED_12122018}}
 
==About this Structure==
[[1lov]] 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=1LOV OCA].


==See Also==
==See Also==
*[[Ribonuclease|Ribonuclease]]
*[[Ribonuclease|Ribonuclease]]
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:012122018</ref><references group="xtra"/>
__TOC__
</StructureSection>
[[Category: Aspergillus oryzae]]
[[Category: Aspergillus oryzae]]
[[Category: Geerlings, P.]]
[[Category: Geerlings, P.]]
Retrieved from "https://proteopedia.org/1lov"