2aad: Difference between revisions
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<StructureSection load='2aad' size='340' side='right'caption='[[2aad]], [[Resolution|resolution]] 2.00Å' scene=''> | <StructureSection load='2aad' size='340' side='right'caption='[[2aad]], [[Resolution|resolution]] 2.00Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2aad]] is a 2 chain structure with sequence from [ | <table><tr><td colspan='2'>[[2aad]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Aspoz Aspoz]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AAD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2AAD FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=2GP:GUANOSINE-2-MONOPHOSPHATE'>2GP</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr> | </td></tr><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=CA:CALCIUM+ION'>CA</scene></td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Ribonuclease_T(1) Ribonuclease T(1)], with EC number [https://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'>[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2aad FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2aad OCA], [https://pdbe.org/2aad PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2aad RCSB], [https://www.ebi.ac.uk/pdbsum/2aad PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2aad ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
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==See Also== | ==See Also== | ||
*[[Ribonuclease|Ribonuclease | *[[Ribonuclease 3D structures|Ribonuclease 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 09:36, 6 October 2021
THE ROLE OF HISTIDINE-40 IN RIBONUCLEASE T1 CATALYSIS: THREE-DIMENSIONAL STRUCTURES OF THE PARTIALLY ACTIVE HIS40LYS MUTANTTHE ROLE OF HISTIDINE-40 IN RIBONUCLEASE T1 CATALYSIS: THREE-DIMENSIONAL STRUCTURES OF THE PARTIALLY ACTIVE HIS40LYS MUTANT
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedHistidine-40 is known to participate in phosphodiester transesterification catalyzed by the enzyme ribonuclease T1. A mutant enzyme with a lysine replacing the histidine-40 (His40Lys RNase T1) retains considerable catalytic activity [Steyaert, J., Hallenga, K., Wyns, L., & Stanssens, P. (1990) Biochemistry 29, 9064-9072]. We report on the crystal structures of His40Lys RNase T1 containing a phosphate anion and a guanosine 2'-phosphate inhibitor in the active site, respectively. Similar to previously described structures, the phosphate-containing crystals are of space group P2(1)2(1)2(1), with one molecule per asymmetric unit (a = 48.27 A, b = 46.50 A, c = 41.14 A). The complex with 2'-GMP crystallized in the lower symmetry space group P2(1), with two molecules per asymmetric unit (a = 49.20 A, b = 48.19 A, c = 40.16 A, beta = 90.26). The crystal structures have been solved at 1.8- and 2.0-A resolution yielding R values of 14.5% and 16.0%, respectively. Comparison of these His40Lys structures with the corresponding wild-type structures, containing 2'-GMP [Arni, R., Heinemann, U., Tokuoka, R., & Saenger, W. (1988) J. Biol. Chem. 263, 15358-15368] and vanadate [Kostrewa, D., Hui-Woog Choe, Heinemann, U., & Saenger, W. (1989) Biochemistry 28, 7692-7600] in the active site, respectively, leads to the following conclusions. First, the His40Lys mutation causes no significant changes in the overall structure of RNase T1; second, the Lys40 side chains in the mutant structures occupy roughly the same space as His40 in the corresponding wild-type RNase T1 structures.(ABSTRACT TRUNCATED AT 250 WORDS) Role of histidine-40 in ribonuclease T1 catalysis: three-dimensionalstructures of the partially active His40Lys mutant.,Zegers I, Verhelst P, Choe HW, Steyaert J, Heinemann U, Saenger W, Wyns L Biochemistry. 1992 Nov 24;31(46):11317-25. PMID:1445870[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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