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| | == Structural highlights == | | == Structural highlights == |
| | <table><tr><td colspan='2'>[[1xvd]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Methylococcus_capsulatus Methylococcus capsulatus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XVD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XVD FirstGlance]. <br> | | <table><tr><td colspan='2'>[[1xvd]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Methylococcus_capsulatus Methylococcus capsulatus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XVD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XVD FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=FPN:4-FLUOROPHENOL'>FPN</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]] 2.3Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1xu3|1xu3]], [[1xu5|1xu5]], [[1xvb|1xvb]], [[1xvc|1xvc]], [[1xve|1xve]], [[1xvf|1xvf]], [[1xvg|1xvg]]</div></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=FPN:4-FLUOROPHENOL'>FPN</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Methane_monooxygenase_(soluble) Methane monooxygenase (soluble)], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.13.25 1.14.13.25] </span></td></tr>
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| | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1xvd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xvd OCA], [https://pdbe.org/1xvd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xvd RCSB], [https://www.ebi.ac.uk/pdbsum/1xvd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xvd 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=1xvd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xvd OCA], [https://pdbe.org/1xvd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xvd RCSB], [https://www.ebi.ac.uk/pdbsum/1xvd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xvd ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/MEMA_METCA MEMA_METCA]] Responsible for the initial oxygenation of methane to methanol in methanotrophs. It also catalyzes the monohydroxylation of a variety of unactivated alkenes, alicyclic, aromatic and heterocyclic compounds. [[https://www.uniprot.org/uniprot/MEMG_METCA MEMG_METCA]] Responsible for the initial oxygenation of methane to methanol in methanotrophs. It also catalyzes the monohydroxylation of a variety of unactivated alkenes, alicyclic, aromatic and heterocyclic compounds. [[https://www.uniprot.org/uniprot/MEMB_METCA MEMB_METCA]] Responsible for the initial oxygenation of methane to methanol in methanotrophs. It also catalyzes the monohydroxylation of a variety of unactivated alkenes, alicyclic, aromatic and heterocyclic compounds.
| + | [https://www.uniprot.org/uniprot/MEMG_METCA MEMG_METCA] Responsible for the initial oxygenation of methane to methanol in methanotrophs. It also catalyzes the monohydroxylation of a variety of unactivated alkenes, alicyclic, aromatic and heterocyclic compounds. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Methane monooxygenase|Methane monooxygenase]] | + | *[[Methane monooxygenase 3D structures|Methane monooxygenase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| | [[Category: Methylococcus capsulatus]] | | [[Category: Methylococcus capsulatus]] |
| - | [[Category: Lippard, S J]] | + | [[Category: Lippard SJ]] |
| - | [[Category: Sazinsky, M H]] | + | [[Category: Sazinsky MH]] |
| - | [[Category: Cavity]]
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| - | [[Category: Diiron]]
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| - | [[Category: Four-helix bundle]]
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| - | [[Category: Methane]]
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| - | [[Category: Oxidoreductase]]
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| - | [[Category: Product binding]]
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| Structural highlights
Function
MEMG_METCA Responsible for the initial oxygenation of methane to methanol in methanotrophs. It also catalyzes the monohydroxylation of a variety of unactivated alkenes, alicyclic, aromatic and heterocyclic compounds.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The soluble methane monooxygenase hydroxylase (MMOH) alpha-subunit contains a series of cavities that delineate the route of substrate entrance to and product egress from the buried carboxylate-bridged diiron center. The presence of discrete cavities is a major structural difference between MMOH, which can hydroxylate methane, and toluene/o-xylene monooxygenase hydroxylase (ToMOH), which cannot. To understand better the functions of the cavities and to investigate how an enzyme designed for methane hydroxylation can also accommodate larger substrates such as octane, methylcubane, and trans-1-methyl-2-phenylcyclopropane, MMOH crystals were soaked with an assortment of different alcohols and their X-ray structures were solved to 1.8-2.4 A resolution. The product analogues localize to cavities 1-3 and delineate a path of product exit and/or substrate entrance from the active site to the surface of the protein. The binding of the alcohols to a position bridging the two iron atoms in cavity 1 extends and validates previous crystallographic, spectroscopic, and computational work indicating this site to be where substrates are hydroxylated and products form. The presence of these alcohols induces perturbations in the amino acid side-chain gates linking pairs of cavities, allowing for the formation of a channel similar to one observed in ToMOH. Upon binding of 6-bromohexan-1-ol, the pi helix formed by residues 202-211 in helix E of the alpha-subunit is extended through residue 216, changing the orientations of several amino acid residues in the active site cavity. This remarkable secondary structure rearrangement in the four-helix bundle has several mechanistic implications for substrate accommodation and the function of the effector protein, MMOB.
Product bound structures of the soluble methane monooxygenase hydroxylase from Methylococcus capsulatus (Bath): protein motion in the alpha-subunit.,Sazinsky MH, Lippard SJ J Am Chem Soc. 2005 Apr 27;127(16):5814-25. PMID:15839679[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Sazinsky MH, Lippard SJ. Product bound structures of the soluble methane monooxygenase hydroxylase from Methylococcus capsulatus (Bath): protein motion in the alpha-subunit. J Am Chem Soc. 2005 Apr 27;127(16):5814-25. PMID:15839679 doi:10.1021/ja044099b
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