7ll3: Difference between revisions
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[7ll3]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_908573 Escherichia coli 908573]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7LL3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7LL3 FirstGlance]. <br> | <table><tr><td colspan='2'>[[7ll3]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_908573 Escherichia coli 908573]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7LL3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7LL3 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PPK:(DIPHOSPHONO)AMINOPHOSPHONIC+ACID'>PPK</scene>, <scene name='pdbligand=UNP:5-O-[(R)-HYDROXY{[(S)-HYDROXY(PHOSPHONOAMINO)PHOSPHORYL]OXY}PHOSPHORYL]URIDINE'>UNP</scene | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.24Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PPK:(DIPHOSPHONO)AMINOPHOSPHONIC+ACID'>PPK</scene>, <scene name='pdbligand=UNP:5-O-[(R)-HYDROXY{[(S)-HYDROXY(PHOSPHONOAMINO)PHOSPHORYL]OXY}PHOSPHORYL]URIDINE'>UNP</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=7ll3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ll3 OCA], [https://pdbe.org/7ll3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ll3 RCSB], [https://www.ebi.ac.uk/pdbsum/7ll3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ll3 ProSAT]</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=7ll3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ll3 OCA], [https://pdbe.org/7ll3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ll3 RCSB], [https://www.ebi.ac.uk/pdbsum/7ll3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ll3 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
[https://www.uniprot.org/uniprot/V0ZE41_ECOLX V0ZE41_ECOLX] Catalyzes the formation of S-adenosylmethionine (AdoMet) from methionine and ATP. The overall synthetic reaction is composed of two sequential steps, AdoMet formation and the subsequent tripolyphosphate hydrolysis which occurs prior to release of AdoMet from the enzyme.[HAMAP-Rule:MF_00086] | |||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
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</div> | </div> | ||
<div class="pdbe-citations 7ll3" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 7ll3" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[S-adenosylmethionine synthetase 3D structures|S-adenosylmethionine synthetase 3D structures]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
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[[Category: Escherichia coli 908573]] | [[Category: Escherichia coli 908573]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Jackson CJ]] | |||
[[Category: Jackson | [[Category: Tan LL]] | ||
[[Category: Tan | |||
Latest revision as of 18:53, 18 October 2023
S-adenosylmethionine synthetase co-crystallized with UppNHpS-adenosylmethionine synthetase co-crystallized with UppNHp
Structural highlights
FunctionV0ZE41_ECOLX Catalyzes the formation of S-adenosylmethionine (AdoMet) from methionine and ATP. The overall synthetic reaction is composed of two sequential steps, AdoMet formation and the subsequent tripolyphosphate hydrolysis which occurs prior to release of AdoMet from the enzyme.[HAMAP-Rule:MF_00086] Publication Abstract from PubMedProtein conformational changes can facilitate the binding of noncognate substrates and underlying promiscuous activities. However, the contribution of substrate conformational dynamics to this process is comparatively poorly understood. Here, we analyze human (hMAT2A) and Escherichia coli (eMAT) methionine adenosyltransferases that have identical active sites but different substrate specificity. In the promiscuous hMAT2A, noncognate substrates bind in a stable conformation to allow catalysis. In contrast, noncognate substrates sample stable productive binding modes less frequently in eMAT owing to altered mobility in the enzyme active site. Different cellular concentrations of substrates likely drove the evolutionary divergence of substrate specificity in these orthologues. The observation of catalytic promiscuity in hMAT2A led to the detection of a new human metabolite, methyl thioguanosine, that is produced at elevated levels in a cancer cell line. This work establishes that identical active sites can result in different substrate specificity owing to the effects of substrate and enzyme dynamics. Substrate Dynamics Contribute to Enzymatic Specificity in Human and Bacterial Methionine Adenosyltransferases.,Gade M, Tan LL, Damry AM, Sandhu M, Brock JS, Delaney A, Villar-Briones A, Jackson CJ, Laurino P JACS Au. 2021 Nov 19;1(12):2349-2360. doi: 10.1021/jacsau.1c00464. eCollection, 2021 Dec 27. PMID:34977903[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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