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1lra

From Proteopedia

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[[Image:1lra.gif|left|200px]]
 
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{{Structure
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==CRYSTALLOGRAPHIC STUDY OF GLU 58 ALA RNASE T1(ASTERISK)2'-GUANOSINE MONOPHOSPHATE AT 1.9 ANGSTROMS RESOLUTION==
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|PDB= 1lra |SIZE=350|CAPTION= <scene name='initialview01'>1lra</scene>, resolution 1.9&Aring;
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<StructureSection load='1lra' size='340' side='right'caption='[[1lra]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=NA:SODIUM+ION'>NA</scene> and <scene name='pdbligand=2GP:GUANOSINE-2'-MONOPHOSPHATE'>2GP</scene>
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<table><tr><td colspan='2'>[[1lra]] 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=1LRA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LRA FirstGlance]. <br>
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|ACTIVITY= [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]
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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]] 1.9&#8491;</td></tr>
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|GENE=
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=2GP:GUANOSINE-2-MONOPHOSPHATE'>2GP</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr>
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}}
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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=1lra FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lra OCA], [https://pdbe.org/1lra PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1lra RCSB], [https://www.ebi.ac.uk/pdbsum/1lra PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1lra 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/lr/1lra_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=1lra ConSurf].
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<div style="clear:both"></div>
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'''CRYSTALLOGRAPHIC STUDY OF GLU 58 ALA RNASE T1(ASTERISK)2'-GUANOSINE MONOPHOSPHATE AT 1.9 ANGSTROMS RESOLUTION'''
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==See Also==
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*[[Ribonuclease 3D structures|Ribonuclease 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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Glu58 is known to participate in phosphodiester transesterification catalyzed by the enzyme RNase T1. For Glu58 RNase T1, an altered mechanism has been proposed in which His40 replaces Glu58 as the base catalyst [Steyaert, J., Hallenga, K., Wyns, L., &amp; Stanssens, P. (1990) Biochemistry 29, 9064-9072]. Glu58Ala Rnase T1 has been cocrystallized with guanosine 2'-monophosphate (2'-GMP). The crystals are of space group P2(1), with one molecule per asymmetric unit (a = 32.44 A, b = 49.64 A, c = 26.09 A, beta = 99.17 degrees). The three-dimensional structure of the enzyme was determined to a nominal resolution of 1.9 A, yielding a crystallographic R factor of 0.178 for all X-ray data. Comparison of this structure with wild-type structures leads to the following conclusions. The minor changes apparent in the tertiary structure can be explained by either the mutation of Glu58 or by the change in the space group. In the active site, the extra space available through the mutation of Glu58 is occupied by the phosphate group (after a reorientation) and by a solvent molecule replacing a carboxylate oxygen of Glu58. This solvent molecule is a candidate for participation in the altered mechanism of this mutant enzyme. Following up on a study of conserved water sites in RNase T1 crystallized in space group P2(1)2(1)2(1) [Malin, R., Zielenkiewicz, P., &amp; Saenger, W. (1991) J. Mol. Biol. 266, 4848-4852], we investigated the hydration structure for four different packing modes of RNase T1.(ABSTRACT TRUNCATED AT 250 WORDS)
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==About this Structure==
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1LRA is a [[Single protein]] structure of 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=1LRA OCA].
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==Reference==
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Crystallographic study of Glu58Ala RNase T1 x 2'-guanosine monophosphate at 1.9-A resolution., Pletinckx J, Steyaert J, Zegers I, Choe HW, Heinemann U, Wyns L, Biochemistry. 1994 Feb 22;33(7):1654-62. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7906540 7906540]
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[[Category: Aspergillus oryzae]]
[[Category: Aspergillus oryzae]]
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[[Category: Ribonuclease T(1)]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Choe H-W]]
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[[Category: Choe, H W.]]
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[[Category: Heinemann U]]
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[[Category: Heinemann, U.]]
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[[Category: Pletinckx J]]
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[[Category: Pletinckx, J.]]
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[[Category: Steyaert J]]
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[[Category: Steyaert, J.]]
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[[Category: Wyns L]]
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[[Category: Wyns, L.]]
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[[Category: 2GP]]
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[[Category: NA]]
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[[Category: hydrolase(endoribonuclease)]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:34:19 2008''
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Current revision

CRYSTALLOGRAPHIC STUDY OF GLU 58 ALA RNASE T1(ASTERISK)2'-GUANOSINE MONOPHOSPHATE AT 1.9 ANGSTROMS RESOLUTION

PDB ID 1lra

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