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4hfj

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X-ray Crystal Structure of a Double Bond Reductase from Nicotiana tabacum

Structural highlights

4hfj is a 2 chain structure with sequence from Nicotiana tabacum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

DBR_TOBAC Reduces the C=C double bonds of alpha, beta unsaturated enones, but has no activity on enones with an endocyclic C=C double-bond. Shows a high specificity for NADPH as the hybrid donor. Substrates are 1-nitrocyclohexene, 2-methylpentenal, trans-cinnamaldehyde, methyl-trans-2-methylcinnamaldehyde, trans-2-nonenal and 1-octen-3-one. Reduced activity with aplha-methyl transcinnamaldehyde, 1-cyclohexene-1-carboxaldehyde, methyl crotonate, (R)-pulegone, and dimethyl itaconate and no activity with maleimides, citral, (5R)- or (5S)-carvone, (S)-perillyl alcohol, and substituted cyclohexenones and cyclopentenones (PubMed:17945329, Ref.3). May also act as a allyl-alcohol dehydrogenase by catalyzing the dehydrogenation of secondary allylic alcohols rather than saturated secondary alcohols. Allyl-alcohol dehydrogenase is specific for the S-stereoisomer of the alcohols (PubMed:11117876).^[1] ^[2] [REFERENCE:3]

Publication Abstract from PubMed

The application of biocatalysis for the asymmetric reduction of activated C=C is a powerful tool for the manufacture of high-value chemical commodities. The biocatalytic potential of "-ene" reductases from the Old Yellow Enzyme (OYE) family of oxidoreductases is well-known; however, the specificity of these enzymes toward mainly small molecule substrates has highlighted the need to discover "-ene" reductases from different enzymatic classes to broaden industrial applicability. Here, we describe the characterization of a flavin-free double bond reductase from Nicotiana tabacum (NtDBR), which belongs to the leukotriene B4 dehydrogenase (LTD) subfamily of the zinc-independent, medium chain dehydrogenase/reductase superfamily of enzymes. Using steady-state kinetics and biotransformation reactions, we have demonstrated the regio- and stereospecificity of NtDBR against a variety of alpha,beta-unsaturated activated alkenes. In addition to catalyzing the reduction of typical LTD substrates and several classical OYE-like substrates, NtDBR also exhibited complementary activity by reducing non-OYE substrates (i.e., reducing the exocyclic C=C double bond of (R)-pulegone) and in some cases showing an opposite stereopreference in comparison with the OYE family member pentaerythritol tetranitrate (PETN) reductase. This serves to augment classical OYE "-ene" reductase activity and, coupled with its aerobic stability, emphasizes the potential industrial value of NtDBR. Furthermore, we also report the X-ray crystal structures of the holo-, binary NADP(H)-bound, and ternary [NADP(+) and 4-hydroxy-3-methoxycinnamaldehyde (9a)-bound] NtDBR complexes. These will underpin structure-driven site-saturated mutagenesis studies aimed at enhancing the reactivity, stereochemistry, and specificity of this enzyme.

Biocatalytic Asymmetric Alkene Reduction: Crystal Structure and Characterization of a Double Bond Reductase from Nicotiana tabacum.,Mansell DJ, Toogood HS, Waller J, Hughes JM, Levy CW, Gardiner JM, Scrutton NS ACS Catal. 2013 Mar 1;3(3):370-379. doi: 10.1021/cs300709m. Epub 2013 Jan 21. PMID:27547488^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Hirata T, Tamura Y, Yokobatake N, Shimoda K, Ashida Y. A 38 kDa allylic alcohol dehydrogenase from the cultured cells of Nicotiana tabacum. Phytochemistry. 2000 Oct;55(4):297-303. PMID:11117876
↑ Matsushima A, Sato Y, Otsuka M, Watanabe T, Yamamoto H, Hirata T. An enone reductase from Nicotiana tabacum: cDNA cloning, expression in Escherichia coli, and reduction of enones with the recombinant proteins. Bioorg Chem. 2008 Feb;36(1):23-8. Epub 2007 Oct 22. PMID:17945329 doi:http://dx.doi.org/10.1016/j.bioorg.2007.08.005
↑ Mansell DJ, Toogood HS, Waller J, Hughes JM, Levy CW, Gardiner JM, Scrutton NS. Biocatalytic Asymmetric Alkene Reduction: Crystal Structure and Characterization of a Double Bond Reductase from Nicotiana tabacum. ACS Catal. 2013 Mar 1;3(3):370-379. doi: 10.1021/cs300709m. Epub 2013 Jan 21. PMID:27547488 doi:http://dx.doi.org/10.1021/cs300709m

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4hfj"

Categories: Large Structures | Nicotiana tabacum | Scrutton NS | Toogood HS

@@ Line 4: / Line 4: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[4hfj]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Nicotiana_tabacum Nicotiana tabacum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4HFJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4HFJ FirstGlance]. <br>
-</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=4hfj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4hfj OCA], [https://pdbe.org/4hfj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4hfj RCSB], [https://www.ebi.ac.uk/pdbsum/4hfj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4hfj ProSAT]</span></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&#8491;</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=4hfj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4hfj OCA], [https://pdbe.org/4hfj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4hfj RCSB], [https://www.ebi.ac.uk/pdbsum/4hfj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4hfj ProSAT]</span></td></tr>
 </table>
 == Function ==

4hfj

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Current revision

X-ray Crystal Structure of a Double Bond Reductase from Nicotiana tabacum

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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