4p54

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'''Unreleased structure'''
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{{STRUCTURE_4p54| PDB=4p54 | SCENE= }}
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===Crystal Structure of the Helicobacter pylori MTAN-D198N mutant with 5'-methylthioadenosine in the active site.===
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{{ABSTRACT_PUBMED_23148563}}
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The entry 4p54 is ON HOLD
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==Function==
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[[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>
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Authors: Ronning, D.R., Mishra, V
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==About this Structure==
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[[4p54]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4P54 OCA].
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Description: Crystal Structure of the Helicobacter pylori MTAN-D198N mutant with 5-methylthioadenosine in the active site.
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==Reference==
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<ref group="xtra">PMID:023148563</ref><references group="xtra"/><references/>
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[[Category: Adenosylhomocysteine nucleosidase]]
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[[Category: Mishra, V]]
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[[Category: Ronning, D R.]]
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[[Category: Homodimer]]
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[[Category: Hydrolase]]

Revision as of 09:19, 2 April 2014

Template:STRUCTURE 4p54

Contents

Crystal Structure of the Helicobacter pylori MTAN-D198N mutant with 5'-methylthioadenosine in the active site.

Template:ABSTRACT PUBMED 23148563

Function

[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.[1] [2]

About this Structure

4p54 is a 1 chain structure. Full crystallographic information is available from OCA.

Reference

  • Mishra V, Ronning DR. Crystal structures of the Helicobacter pylori MTAN enzyme reveal specific interactions between S-adenosylhomocysteine and the 5'-alkylthio binding subsite. Biochemistry. 2012 Dec 4;51(48):9763-72. doi: 10.1021/bi301221k. Epub 2012 Nov, 20. PMID:23148563 doi:http://dx.doi.org/10.1021/bi301221k
  1. ↑ Ronning DR, Iacopelli NM, Mishra V. Enzyme-ligand interactions that drive active site rearrangements in the Helicobacter pylori 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase. Protein Sci. 2010 Oct 15. PMID:20954236 doi:10.1002/pro.524
  2. ↑ Wang S, Haapalainen AM, Yan F, Du Q, Tyler PC, Evans GB, Rinaldo-Matthis A, Brown RL, Norris GE, Almo SC, Schramm VL. A Picomolar Transition State Analogue Inhibitor of MTAN as a Specific Antibiotic for Helicobacter pylori. Biochemistry. 2012 Sep 4;51(35):6892-4. Epub 2012 Aug 22. PMID:22891633 doi:http://dx.doi.org/10.1021/bi3009664

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