5tdu: Difference between revisions
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==Toluene 4-monooxygenase (T4moHD) bound to product after turnover in crystal== | ==Toluene 4-monooxygenase (T4moHD) bound to product after turnover in crystal== | ||
<StructureSection load='5tdu' size='340' side='right' caption='[[5tdu]], [[Resolution|resolution]] 1.74Å' scene=''> | <StructureSection load='5tdu' size='340' side='right'caption='[[5tdu]], [[Resolution|resolution]] 1.74Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[5tdu]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_25411 Atcc 25411]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5TDU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5TDU FirstGlance]. <br> | <table><tr><td colspan='2'>[[5tdu]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_25411 Atcc 25411]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5TDU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5TDU FirstGlance]. <br> | ||
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</div> | </div> | ||
<div class="pdbe-citations 5tdu" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 5tdu" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[Monooxygenase 3D structures|Monooxygenase 3D structures]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Atcc 25411]] | [[Category: Atcc 25411]] | ||
[[Category: Large Structures]] | |||
[[Category: Acheson, J F]] | [[Category: Acheson, J F]] | ||
[[Category: Fox, B G]] | [[Category: Fox, B G]] | ||
[[Category: Diiron]] | [[Category: Diiron]] | ||
[[Category: Oxidoreductase]] | [[Category: Oxidoreductase]] | ||
Revision as of 10:52, 27 November 2019
Toluene 4-monooxygenase (T4moHD) bound to product after turnover in crystalToluene 4-monooxygenase (T4moHD) bound to product after turnover in crystal
Structural highlights
Function[TMOD_PSEME] Effector protein subunit of the multicomponent enzyme toluene-4-monooxygenase that hydroxylates toluene to form p-cresol. Required for optimal efficiency and specificity of the holoenzyme.[1] [2] [3] [TMOA_PSEME] Hydroxylase subunit of the multicomponent enzyme toluene-4-monooxygenase that hydroxylates toluene to form p-cresol.[4] [5] [TMOB_PSEME] Subunit T4moB of the multicomponent enzyme toluene-4-monooxygenase that hydroxylates toluene to form p-cresol.[6] [7] [TMOE_PSEME] Subunit of the multicomponent enzyme toluene-4-monooxygenase that hydroxylates toluene to form p-cresol. Publication Abstract from PubMedElectrophilic aromatic substitution is one of the most important and recognizable classes of organic chemical transformation. Enzymes create the strong electrophiles that are needed for these highly energetic reactions by using O2, electrons, and metals or other cofactors. Although the nature of the oxidants that carry out electrophilic aromatic substitution has been deduced from many approaches, it has been difficult to determine their structures. Here we show the structure of a diiron hydroxylase intermediate formed during a reaction with toluene. Density functional theory geometry optimizations of an active site model reveal that the intermediate is an arylperoxo Fe2+/Fe3+ species with delocalized aryl radical character. The structure suggests that a carboxylate ligand of the diiron centre may trigger homolytic cleavage of the O-O bond by transferring a proton from a metal-bound water. Our work provides the spatial and electronic constraints needed to propose a comprehensive mechanism for diiron enzyme arene hydroxylation that accounts for many prior experimental results. In-crystal reaction cycle of a toluene-bound diiron hydroxylase.,Acheson JF, Bailey LJ, Brunold TC, Fox BG Nature. 2017 Mar 27. doi: 10.1038/nature21681. PMID:28346937[8] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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