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==Crystal Structure of hMAT Mutant K289L==
==Crystal Structure of hMAT Mutant K289L==
<StructureSection load='6p9v' size='340' side='right'caption='[[6p9v]]' scene=''>
<StructureSection load='6p9v' size='340' side='right'caption='[[6p9v]], [[Resolution|resolution]] 2.05&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6P9V OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6P9V FirstGlance]. <br>
<table><tr><td colspan='2'>[[6p9v]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6P9V OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6P9V FirstGlance]. <br>
</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=6p9v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6p9v OCA], [http://pdbe.org/6p9v PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6p9v RCSB], [http://www.ebi.ac.uk/pdbsum/6p9v PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6p9v ProSAT]</span></td></tr>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADN:ADENOSINE'>ADN</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=POP:PYROPHOSPHATE+2-'>POP</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">MAT2A, AMS2, MATA2 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Methionine_adenosyltransferase Methionine adenosyltransferase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.6 2.5.1.6] </span></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=6p9v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6p9v OCA], [https://pdbe.org/6p9v PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6p9v RCSB], [https://www.ebi.ac.uk/pdbsum/6p9v PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6p9v ProSAT]</span></td></tr>
</table>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/METK2_HUMAN METK2_HUMAN]] Catalyzes the formation of S-adenosylmethionine from methionine and ATP.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The structural conservation among methyltransferases (MTs) and MT functional redundancy is a major challenge to the cellular study of individual MTs. As a first step toward the development of an alternative biorthogonal platform for MTs and other AdoMet-utilizing enzymes, we describe the evaluation of 38 human methionine adenosyltransferase II-alpha (hMAT2A) mutants in combination with 14 non-native methionine analogues to identify suitable bioorthogonal mutant/analogue pairings. Enabled by the development and implementation of a hMAT2A high-throughput (HT) assay, this study revealed hMAT2A K289L to afford a 160-fold inversion of the hMAT2A selectivity index for a non-native methionine analogue over the native substrate l-Met. Structure elucidation of K289L revealed the mutant to be folded normally with minor observed repacking within the modified substrate pocket. This study highlights the first example of exchanging l-Met terminal carboxylate/amine recognition elements within the hMAT2A active-site to enable non-native bioorthgonal substrate utilization. Additionally, several hMAT2A mutants and l-Met substrate analogues produced AdoMet analogue products with increased stability. As many AdoMet-producing (e.g., hMAT2A) and AdoMet-utlizing (e.g., MTs) enzymes adopt similar active-site strategies for substrate recognition, the proof of concept first generation hMAT2A engineering highlighted herein is expected to translate to a range of AdoMet-utilizing target enzymes.
Methionine Adenosyltransferase Engineering to Enable Bioorthogonal Platforms for AdoMet-Utilizing Enzymes.,Huber TD, Clinger JA, Liu Y, Xu W, Miller MD, Phillips GN Jr, Thorson JS ACS Chem Biol. 2020 Mar 20;15(3):695-705. doi: 10.1021/acschembio.9b00943. Epub, 2020 Mar 3. PMID:32091873<ref>PMID:32091873</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6p9v" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Human]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Clinger JA]]
[[Category: Methionine adenosyltransferase]]
[[Category: Huber TD]]
[[Category: Clinger, J A]]
[[Category: Liu Y]]
[[Category: Huber, T D]]
[[Category: Miller MD]]
[[Category: Liu, Y]]
[[Category: Philips Jr GN]]
[[Category: Miller, M D]]
[[Category: Thorson JS]]
[[Category: Phillips, G N]]
[[Category: Xu W]]
[[Category: Thorson, J S]]
[[Category: Xu, W]]
[[Category: Adenosyl transferase]]
[[Category: Adomet synthase]]
[[Category: Natural product enzyme]]
[[Category: Transferase]]
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