3cmq: Difference between revisions
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<StructureSection load='3cmq' size='340' side='right'caption='[[3cmq]], [[Resolution|resolution]] 2.20Å' scene=''> | <StructureSection load='3cmq' size='340' side='right'caption='[[3cmq]], [[Resolution|resolution]] 2.20Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3cmq]] is a 1 chain structure with sequence from [ | <table><tr><td colspan='2'>[[3cmq]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3CMQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3CMQ FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FA5:ADENOSINE-5-[PHENYLALANINYL-PHOSPHATE]'>FA5</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> | |||
<tr id=' | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3cmq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3cmq OCA], [https://pdbe.org/3cmq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3cmq RCSB], [https://www.ebi.ac.uk/pdbsum/3cmq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3cmq ProSAT]</span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/SYFM_HUMAN SYFM_HUMAN] Catalyzes direct attachment of p-Tyr (Tyr) to tRNAPhe. Permits also, with a lower efficiency, the attachment of m-Tyr to tRNAPhe, thereby opening the way for delivery of the misacylated tRNA to the ribosome and incorporation of ROS-damaged amino acid into proteins.<ref>PMID:19549855</ref> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Finarov I]] | |||
[[Category: Finarov | [[Category: Kessler N]] | ||
[[Category: Kessler | [[Category: Klipcan L]] | ||
[[Category: Klipcan | [[Category: Levin IL]] | ||
[[Category: Levin | [[Category: Moor N]] | ||
[[Category: Moor | [[Category: Safro M]] | ||
[[Category: Safro | |||
Latest revision as of 15:30, 30 August 2023
Crystal structure of human mitochondrial phenylalanine tRNA synthetaseCrystal structure of human mitochondrial phenylalanine tRNA synthetase
Structural highlights
FunctionSYFM_HUMAN Catalyzes direct attachment of p-Tyr (Tyr) to tRNAPhe. Permits also, with a lower efficiency, the attachment of m-Tyr to tRNAPhe, thereby opening the way for delivery of the misacylated tRNA to the ribosome and incorporation of ROS-damaged amino acid into proteins.[1] 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 PubMedAll class II aminoacyl-tRNA synthetases (aaRSs) are known to be active as functional homodimers, homotetramers, or heterotetramers. However, multimeric organization is not a prerequisite for phenylalanylation activity, as monomeric mitochondrial phenylalanyl-tRNA synthetase (PheRS) is also active. We herein report the structure, at 2.2 A resolution, of a human monomeric mitPheRS complexed with Phe-AMP. The smallest known aaRS, which is, in fact, 1/5 of a cytoplasmic analog, is a chimera of the catalytic module of the alpha and anticodon binding domain (ABD) of the bacterial beta subunit of (alphabeta)2 PheRS. We demonstrate that the ABD located at the C terminus of mitPheRS overlaps with the acceptor stem of phenylalanine transfer RNA (tRNAPhe) if the substrate is positioned in a manner similar to that seen in the binary Thermus thermophilus complex. Thus, formation of the PheRS-tRNAPhe complex in human mitochondria must be accompanied by considerable rearrangement (hinge-type rotation through approximately 160 degrees) of the ABD upon tRNA binding. The tRNA-induced conformational activation of human mitochondrial phenylalanyl-tRNA synthetase.,Klipcan L, Levin I, Kessler N, Moor N, Finarov I, Safro M Structure. 2008 Jul;16(7):1095-104. PMID:18611382[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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