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< | ==soluble methane monooxygenase hydroxylase: 6-bromohexanol soaked structure== | ||
<StructureSection load='1xvb' size='340' side='right'caption='[[1xvb]], [[Resolution|resolution]] 1.80Å' scene=''> | |||
You may | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1xvb]] 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=1XVB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XVB FirstGlance]. <br> | |||
or | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.8Å</td></tr> | ||
-- | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=3BR:1-BROMOPROPANE'>3BR</scene>, <scene name='pdbligand=BBU:1-BROMOBUTANE'>BBU</scene>, <scene name='pdbligand=BBX:1-BROMOETHANE'>BBX</scene>, <scene name='pdbligand=BHL:6-BROMOHEXAN-1-OL'>BHL</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</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=1xvb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xvb OCA], [https://pdbe.org/1xvb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xvb RCSB], [https://www.ebi.ac.uk/pdbsum/1xvb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xvb ProSAT]</span></td></tr> | |||
</table> | |||
== 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. | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/xv/1xvb_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1xvb ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== 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<ref>PMID:15839679</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 1xvb" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Methane monooxygenase 3D structures|Methane monooxygenase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
== | [[Category: Large Structures]] | ||
== | |||
[[Category: | |||
[[Category: Methylococcus capsulatus]] | [[Category: Methylococcus capsulatus]] | ||
[[Category: Lippard SJ]] | |||
[[Category: Lippard | [[Category: Sazinsky MH]] | ||
[[Category: Sazinsky | |||