7UTF | pdb_00007utf

Structure-Function characterization of an aldo-keto reductase involved in detoxification of the mycotoxin, deoxynivalenol

PDB DOI: https://doi.org/10.2210/pdb7UTF/pdb

Classification: OXIDOREDUCTASE
Organism(s): Rhizobium leguminosarum
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2022-04-26 Released: 2022-09-07
Deposition Author(s): Abraham, N., Schroeter, K.L., Kimber, M.S., Seah, S.Y.K.
Funding Organization(s): Other private

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.50 Å
R-Value Free:
0.234 (Depositor), 0.233 (DCC)
R-Value Work:
0.185 (Depositor), 0.185 (DCC)
R-Value Observed:
0.187 (Depositor)

Starting Model: experimental
View more details

wwPDB Validation 3D Report Full Report

This is version 1.1 of the entry. See complete history.

Literature

Structure-function characterization of an aldo-keto reductase involved in detoxification of the mycotoxin, deoxynivalenol.

Abraham, N., Schroeter, K.L., Zhu, Y., Chan, J., Evans, N., Kimber, M.S., Carere, J., Zhou, T., Seah, S.Y.K.

(2022) Sci Rep 12: 14737-14737

PubMed: 36042239 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1038/s41598-022-19040-8
Primary Citation Related Structures:
7UTF

PubMed Abstract:
Deoxynivalenol (DON) is a mycotoxin, produced by filamentous fungi such as Fusarium graminearum, that causes significant yield losses of cereal grain crops worldwide. One of the most promising methods to detoxify this mycotoxin involves its enzymatic epimerization to 3-epi-DON. DepB plays a critical role in this process by reducing 3-keto-DON, an intermediate in the epimerization process, to 3-epi-DON. DepB _Rleg from Rhizobium leguminosarum is a member of the new aldo-keto reductase family, AKR18, and it has the unusual ability to utilize both NADH and NADPH as coenzymes, albeit with a 40-fold higher catalytic efficiency with NADPH compared to NADH. Structural analysis of DepB _Rleg revealed the putative roles of Lys-217, Arg-290, and Gln-294 in NADPH specificity. Replacement of these residues by site-specific mutagenesis to negatively charged amino acids compromised NADPH binding with minimal effects on NADH binding. The substrate-binding site of DepB _Rleg is larger than its closest structural homolog, AKR6A2, likely contributing to its ability to utilize a wide range of aldehydes and ketones, including the mycotoxin, patulin, as substrates. The structure of DepB _Rleg also suggests that 3-keto-DON can adopt two binding modes to facilitate 4-pro-R hydride transfer to either the re- or si-face of the C3 ketone providing a possible explanation for the enzyme's ability to convert 3-keto-DON to 3-epi-DON and DON in diastereomeric ratios of 67.2% and 32.8% respectively.

Organizational Affiliation

Department of Molecular and Cellular Biology, University of Guelph, Guelph, Canada.

Macromolecule Content

Total Structure Weight: 162.4 kDa
Atom Count: 10,579
Modeled Residue Count: 1,275
Deposited Residue Count: 1,452
Unique protein chains: 1

Macromolecules

Find similar proteins by:

| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Putative oxidoreductase, aryl-alcohol dehydrogenase like protein	A, B, C, D	363	Rhizobium leguminosarum	Mutation(s): 0 Gene Names: Rleg4DRAFT_7458
UniProt
Find proteins for J0WHR2 (Rhizobium leguminosarum bv. trifolii WSM2297) Explore J0WHR2 Go to UniProtKB: J0WHR2
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	J0WHR2
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
FLC Query on FLC Download:Ideal Coordinates CCD File SDF format, chain M [auth A] MOL2 format, chain M [auth A] mmCIF format, chain M [auth A]	M [auth A]	CITRATE ANION C₆ H₅ O₇ KRKNYBCHXYNGOX-UHFFFAOYSA-K		Interactions Focus chain M [auth A] Interactions & Density Focus chain M [auth A]
SO4 Query on SO4 Download:Ideal Coordinates CCD File SDF format, chain CA [auth C] SDF format, chain DA [auth C] SDF format, chain E [auth A] SDF format, chain EA [auth C] SDF format, chain F [auth A] SDF format, chain FA [auth D] SDF format, chain G [auth A] SDF format, chain GA [auth D] SDF format, chain H [auth A] SDF format, chain HA [auth D] SDF format, chain I [auth A] SDF format, chain IA [auth D] SDF format, chain J [auth A] SDF format, chain JA [auth D] SDF format, chain K [auth A] SDF format, chain KA [auth D] SDF format, chain L [auth A] SDF format, chain LA [auth D] SDF format, chain MA [auth D] SDF format, chain N [auth B] SDF format, chain O [auth B] SDF format, chain P [auth B] SDF format, chain Q [auth B] SDF format, chain R [auth B] SDF format, chain S [auth B] SDF format, chain T [auth B] SDF format, chain U [auth B] SDF format, chain V [auth B] SDF format, chain W [auth B] SDF format, chain X [auth C] SDF format, chain Z [auth C] SDF format, chain Y [auth C] SDF format, chain BA [auth C] SDF format, chain AA [auth C] MOL2 format, chain CA [auth C] MOL2 format, chain DA [auth C] MOL2 format, chain E [auth A] MOL2 format, chain EA [auth C] MOL2 format, chain F [auth A] MOL2 format, chain FA [auth D] MOL2 format, chain G [auth A] MOL2 format, chain GA [auth D] MOL2 format, chain H [auth A] MOL2 format, chain HA [auth D] MOL2 format, chain I [auth A] MOL2 format, chain IA [auth D] MOL2 format, chain J [auth A] MOL2 format, chain JA [auth D] MOL2 format, chain K [auth A] MOL2 format, chain KA [auth D] MOL2 format, chain L [auth A] MOL2 format, chain LA [auth D] MOL2 format, chain MA [auth D] MOL2 format, chain N [auth B] MOL2 format, chain O [auth B] MOL2 format, chain P [auth B] MOL2 format, chain Q [auth B] MOL2 format, chain R [auth B] MOL2 format, chain S [auth B] MOL2 format, chain T [auth B] MOL2 format, chain U [auth B] MOL2 format, chain V [auth B] MOL2 format, chain W [auth B] MOL2 format, chain X [auth C] MOL2 format, chain Z [auth C] MOL2 format, chain Y [auth C] MOL2 format, chain BA [auth C] MOL2 format, chain AA [auth C] mmCIF format, chain CA [auth C] mmCIF format, chain DA [auth C] mmCIF format, chain E [auth A] mmCIF format, chain EA [auth C] mmCIF format, chain F [auth A] mmCIF format, chain FA [auth D] mmCIF format, chain G [auth A] mmCIF format, chain GA [auth D] mmCIF format, chain H [auth A] mmCIF format, chain HA [auth D] mmCIF format, chain I [auth A] mmCIF format, chain IA [auth D] mmCIF format, chain J [auth A] mmCIF format, chain JA [auth D] mmCIF format, chain K [auth A] mmCIF format, chain KA [auth D] mmCIF format, chain L [auth A] mmCIF format, chain LA [auth D] mmCIF format, chain MA [auth D] mmCIF format, chain N [auth B] mmCIF format, chain O [auth B] mmCIF format, chain P [auth B] mmCIF format, chain Q [auth B] mmCIF format, chain R [auth B] mmCIF format, chain S [auth B] mmCIF format, chain T [auth B] mmCIF format, chain U [auth B] mmCIF format, chain V [auth B] mmCIF format, chain W [auth B] mmCIF format, chain X [auth C] mmCIF format, chain Z [auth C] mmCIF format, chain Y [auth C] mmCIF format, chain BA [auth C] mmCIF format, chain AA [auth C]	AA [auth C] BA [auth C] CA [auth C] DA [auth C] E [auth A] AA [auth C], BA [auth C], CA [auth C], DA [auth C], E [auth A], EA [auth C], F [auth A], FA [auth D], G [auth A], GA [auth D], H [auth A], HA [auth D], I [auth A], IA [auth D], J [auth A], JA [auth D], K [auth A], KA [auth D], L [auth A], LA [auth D], MA [auth D], N [auth B], O [auth B], P [auth B], Q [auth B], R [auth B], S [auth B], T [auth B], U [auth B], V [auth B], W [auth B], X [auth C], Y [auth C], Z [auth C]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain AA [auth C] Focus chain BA [auth C] Focus chain CA [auth C] Focus chain DA [auth C] Focus chain E [auth A] Focus chain EA [auth C] Focus chain F [auth A] Focus chain FA [auth D] Focus chain G [auth A] Focus chain GA [auth D] Focus chain H [auth A] Focus chain HA [auth D] Focus chain I [auth A] Focus chain IA [auth D] Focus chain J [auth A] Focus chain JA [auth D] Focus chain K [auth A] Focus chain KA [auth D] Focus chain L [auth A] Focus chain LA [auth D] Focus chain MA [auth D] Focus chain N [auth B] Focus chain O [auth B] Focus chain P [auth B] Focus chain Q [auth B] Focus chain R [auth B] Focus chain S [auth B] Focus chain T [auth B] Focus chain U [auth B] Focus chain V [auth B] Focus chain W [auth B] Focus chain X [auth C] Focus chain Y [auth C] Focus chain Z [auth C] Interactions & Density Focus chain AA [auth C] Focus chain BA [auth C] Focus chain CA [auth C] Focus chain DA [auth C] Focus chain E [auth A] Focus chain EA [auth C] Focus chain F [auth A] Focus chain FA [auth D] Focus chain G [auth A] Focus chain GA [auth D] Focus chain H [auth A] Focus chain HA [auth D] Focus chain I [auth A] Focus chain IA [auth D] Focus chain J [auth A] Focus chain JA [auth D] Focus chain K [auth A] Focus chain KA [auth D] Focus chain L [auth A] Focus chain LA [auth D] Focus chain MA [auth D] Focus chain N [auth B] Focus chain O [auth B] Focus chain P [auth B] Focus chain Q [auth B] Focus chain R [auth B] Focus chain S [auth B] Focus chain T [auth B] Focus chain U [auth B] Focus chain V [auth B] Focus chain W [auth B] Focus chain X [auth C] Focus chain Y [auth C] Focus chain Z [auth C]