View source for 1rga

==CRYSTAL STRUCTURE OF RNASE T1 WITH 3'-GMP AND GUANOSINE: A PRODUCT COMPLEX==
<StructureSection load='1rga' size='340' side='right' caption='[[1rga]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1rga]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Aspoz Aspoz]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RGA OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1RGA FirstGlance]. <br>
</td></tr><tr id='ligand'><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></td></tr>
<tr id='activity'><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 id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1rga FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rga OCA], [http://pdbe.org/1rga PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1rga RCSB], [http://www.ebi.ac.uk/pdbsum/1rga 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/rg/1rga_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/main_output.php?pdb_ID=1rga ConSurf].
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== Publication Abstract from PubMed ==
A modified method for the synthesis and separation of endo and exo guanosine 2',3'-cyclophosphorothioate (cGPS) has been developed. The exo diastereoisomer has been co-crystallized with RNase T1. cGPS is known to be a RNase T1 inhibitor but is also a very slow substrate. It was hydrolyzed during the crystallization, leaving 3'-guanylic acid (3'-GMP) in the active site. As a guanosine was also found to be bound in a subsite, the enzyme contains the products of the reaction of guanylyl-3',5'-guanosine. The structure was refined to a resolution of 1.7 A and yielded a final R value of 14.5%. In contrast to previous 3'-GMP complexes of RNase T1, the ribose phosphate moiety of the inhibitor is in contact with all the active site residues. The phosphate forms hydrogen bonds with Asn36, Tyr38, Arg77, His92, and with Asn49 from a symmetry-related molecule. The ribose 2'-OH is hydrogen-bonded to both Glu58 and His40. The interactions in the active site of the present structure are compared to those found in the 2'-GMP complex of RNase T1.

Crystal structure of RNase T1 with 3'-guanylic acid and guanosine.,Zegers I, Haikal AF, Palmer R, Wyns L J Biol Chem. 1994 Jan 7;269(1):127-33. PMID:8276784<ref>PMID:8276784</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1rga" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ribonuclease|Ribonuclease]]
*[[Temp|Temp]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Aspoz]]
[[Category: Wyns, L]]
[[Category: Zegers, I]]