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==Crystal structure of Helicobacter pylori 5'-methylthioadenosine/S-adenosyl homocysteine nucleosidase (MTAN) complexed with hydroxybutylthio-DADMe-Immucillin-A==
==Crystal structure of Helicobacter pylori 5'-methylthioadenosine/S-adenosyl homocysteine nucleosidase (MTAN) complexed with hydroxybutylthio-DADMe-Immucillin-A==
<StructureSection load='4wko' size='340' side='right' caption='[[4wko]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
<StructureSection load='4wko' size='340' side='right'caption='[[4wko]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4wko]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4WKO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4WKO FirstGlance]. <br>
<table><tr><td colspan='2'>[[4wko]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Helicobacter_pylori_J99 Helicobacter pylori J99]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4WKO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4WKO FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HCE:{(3R,4S)-1-[(4-AMINO-5H-PYRROLO[3,2-D]PYRIMIDIN-7-YL)METHYL]-4-HYDROXYPYRROLIDIN-3-YL}-L-METHIONINE'>HCE</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4ffs|4ffs]], [[4wkn|4wkn]], [[4wkc|4wkc]], [[4wkp|4wkp]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GMD:(3R,4S)-1-[(4-amino-5H-pyrrolo[3,2-d]pyrimidin-7-yl)methyl]-4-{[(4-hydroxybutyl)sulfanyl]methyl}pyrrolidin-3-ol'>GMD</scene></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Adenosylhomocysteine_nucleosidase Adenosylhomocysteine nucleosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.9 3.2.2.9] </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=4wko FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4wko OCA], [https://pdbe.org/4wko PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4wko RCSB], [https://www.ebi.ac.uk/pdbsum/4wko PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4wko ProSAT]</span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4wko FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4wko OCA], [http://pdbe.org/4wko PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4wko RCSB], [http://www.ebi.ac.uk/pdbsum/4wko PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4wko ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/MQMTN_HELPJ MQMTN_HELPJ]] Catalyzes the direct conversion of aminodeoxyfutalosine (AFL) into dehypoxanthine futalosine (DHFL) and adenine via the hydrolysis of the N-glycosidic bond; this reaction seems to represent an essential step in the menaquinone biosynthesis pathway in Helicobacter species. Also catalyzes the hydrolysis of 5'-methylthioadenosine (MTA) to adenine and 5'-methylthioribose. Can also probably use S-adenosylhomocysteine (SAH) as substrate, leading to adenine and S-ribosylhomocysteine. These other activities highlight the tremendous versatility of the enzyme, which also plays key roles in S-adenosylmethionine recycling and in the biosynthesis of the quorum-sensing molecule autoinducer-2.<ref>PMID:20954236</ref> <ref>PMID:22891633</ref>
[https://www.uniprot.org/uniprot/MQMTN_HELPJ MQMTN_HELPJ] Catalyzes the direct conversion of aminodeoxyfutalosine (AFL) into dehypoxanthine futalosine (DHFL) and adenine via the hydrolysis of the N-glycosidic bond; this reaction seems to represent an essential step in the menaquinone biosynthesis pathway in Helicobacter species. Also catalyzes the hydrolysis of 5'-methylthioadenosine (MTA) to adenine and 5'-methylthioribose. Can also probably use S-adenosylhomocysteine (SAH) as substrate, leading to adenine and S-ribosylhomocysteine. These other activities highlight the tremendous versatility of the enzyme, which also plays key roles in S-adenosylmethionine recycling and in the biosynthesis of the quorum-sensing molecule autoinducer-2.<ref>PMID:20954236</ref> <ref>PMID:22891633</ref>  
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== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Adenosylhomocysteine nucleosidase]]
[[Category: Helicobacter pylori J99]]
[[Category: Almo, S C]]
[[Category: Large Structures]]
[[Category: Cameron, S A]]
[[Category: Almo SC]]
[[Category: Schramm, V L]]
[[Category: Cameron SA]]
[[Category: Wang, S]]
[[Category: Schramm VL]]
[[Category: Hydrolase]]
[[Category: Wang S]]
[[Category: Hydrolase-hydrolase inhibitor complex]]

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