View source for 6aan


==Crystal structure of Methanosarcina mazei PylRS(Y306A/Y384F) complexed with mEtZLys==
<StructureSection load='6aan' size='340' side='right'caption='[[6aan]], [[Resolution|resolution]] 1.51&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6aan]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Methanosarcina_mazei_JCM_9314 Methanosarcina mazei JCM 9314]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6AAN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6AAN FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.51&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=9TX:N6-{[(3-ethynylphenyl)methoxy]carbonyl}-L-lysine'>9TX</scene>, <scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6aan FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6aan OCA], [https://pdbe.org/6aan PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6aan RCSB], [https://www.ebi.ac.uk/pdbsum/6aan PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6aan ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PYLS_METMA PYLS_METMA] Catalyzes the attachment of pyrrolysine to tRNA(Pyl). Pyrrolysine is a lysine derivative encoded by the termination codon UAG (By similarity).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Pyrrolysyl-tRNA synthetase (PylRS) and tRNA(Pyl) have been extensively used for genetic-code expansion. A Methanosarcina mazei PylRS mutant bearing the Y306A and Y384F mutations (PylRS(Y306A/Y384F)) encodes various bulky non-natural lysine derivatives by UAG. In this study, we examined how PylRS(Y306A/Y384F) recognizes many amino acids. Among 17 non-natural lysine derivatives, N(varepsilon)-(benzyloxycarbonyl)lysine (ZLys) and 10 ortho/meta/para-substituted ZLys derivatives were efficiently ligated to tRNA(Pyl) and were incorporated into proteins by PylRS(Y306A/Y384F). We determined crystal structures of 14 non-natural lysine derivatives bound to the PylRS(Y306A/Y384F) catalytic fragment. The meta- and para-substituted ZLys derivatives are snugly accommodated in the productive mode. In contrast, ZLys and the unsubstituted or ortho-substituted ZLys derivatives exhibited an alternative binding mode in addition to the productive mode. PylRS(Y306A/Y384F) displayed a high aminoacylation rate for ZLys, indicating that the double-binding mode minimally affects aminoacylation. These precise substrate recognition mechanisms by PylRS(Y306A/Y384F) may facilitate the structure-based design of novel non-natural amino acids.

Structural Basis for Genetic-Code Expansion with Bulky Lysine Derivatives by an Engineered Pyrrolysyl-tRNA Synthetase.,Yanagisawa T, Kuratani M, Seki E, Hino N, Sakamoto K, Yokoyama S Cell Chem Biol. 2019 Apr 5. pii: S2451-9456(19)30104-7. doi:, 10.1016/j.chembiol.2019.03.008. PMID:31031143<ref>PMID:31031143</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6aan" style="background-color:#fffaf0;"></div>

==See Also==
*[[Aminoacyl tRNA synthetase 3D structures|Aminoacyl tRNA synthetase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Methanosarcina mazei JCM 9314]]
[[Category: Kuratani M]]
[[Category: Yanagisawa T]]
[[Category: Yokoyama S]]