1xty

<table><tr><td colspan='2'>[[1xty]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Sulso Sulso]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XTY OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1XTY FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">pth ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=273057 SULSO])</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Aminoacyl-tRNA_hydrolase Aminoacyl-tRNA hydrolase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.1.29 3.1.1.29] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1xty FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xty OCA], [http://pdbe.org/1xty PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1xty RCSB], [http://www.ebi.ac.uk/pdbsum/1xty PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1xty ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/PTH_SULSO PTH_SULSO]] The natural substrate for this enzyme may be peptidyl-tRNAs which drop off the ribosome during protein synthesis (By similarity).<ref>PMID:12799450</ref>

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== Publication Abstract from PubMed ==

The 3-D structure of the peptidyl-tRNA hydrolase from the archaea Sulfolobus solfataricus has been solved at 1.8 A resolution. Homologues of this enzyme are found in archaea and eucarya. Bacteria display a different type of peptidyl-tRNA hydrolase that is also encountered in eucarya. In solution, the S. solfataricus hydrolase behaves as a dimer. In agreement, the crystalline structure of this enzyme indicates the formation of a dimer. Each protomer is made of a mixed five-stranded beta-sheet surrounded by two groups of two alpha-helices. The dimer interface is mainly formed by van der Waals interactions between hydrophobic residues belonging to the two N-terminal alpha1 helices contributed by two protomers. Site-directed mutagenesis experiments were designed for probing the basis of specificity of the archaeal hydrolase. Among the strictly conserved residues within the archaeal/eucaryal peptidyl-tRNA hydrolase family, three residues, K18, D86, and T90, appear of utmost importance for activity. They are located in the N-part of alpha1 and in the beta3-beta4 loop. K18 and D86, which form a salt bridge, might play a role in the catalysis thanks to their acid and basic functions, whereas the OH group of T90 could act as a nucleophile. These observations clearly distinguish the active site of the archaeal/eucaryal hydrolases from that of the bacterial/eucaryal ones, where a histidine is believed to serve as the catalytic base.

Crystal structure at 1.8 A resolution and identification of active site residues of Sulfolobus solfataricus peptidyl-tRNA hydrolase.,Fromant M, Schmitt E, Mechulam Y, Lazennec C, Plateau P, Blanquet S Biochemistry. 2005 Mar 22;44(11):4294-301. PMID:15766258<ref>PMID:15766258</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 1xty" style="background-color:#fffaf0;"></div>

[[Category: Aminoacyl-tRNA hydrolase]]

[[Category: Sulso]]

[[Category: Blanquet, S]]

[[Category: Fromant, M]]

[[Category: Lazennec, C]]

[[Category: Mechulam, Y]]

[[Category: Plateau, P]]

[[Category: Schmitt, E]]

[[Category: Mixed beta sheet]]