7EGV

Acetolactate Synthase from Trichoderma harzianum with inhibitor harzianic acid

PDB DOI: https://doi.org/10.2210/pdb7EGV/pdb

Classification: TRANSFERASE
Organism(s): Trichoderma harzianum
Expression System: Escherichia coli
Mutation(s): Yes

Deposited: 2021-03-26 Released: 2021-06-30
Deposition Author(s): Zang, X., Xie, L., Chen, M., Tang, Y., Zhou, J.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.54 Å
R-Value Free: 0.222
R-Value Work: 0.175
R-Value Observed: 0.177

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

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

Literature

Harzianic Acid from Trichoderma afroharzianum Is a Natural Product Inhibitor of Acetohydroxyacid Synthase.

Xie, L., Zang, X., Cheng, W., Zhang, Z., Zhou, J., Chen, M., Tang, Y.

(2021) J Am Chem Soc

PubMed: 34132537 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1021/jacs.1c03988
Primary Citation of Related Structures:
7EGV, 7EHE

PubMed Abstract:
Acetohydroxyacid synthase (AHAS) is the first enzyme in the branched-chain amino acid biosynthetic pathway and is a validated target for herbicide and fungicide development. Here we report harzianic acid (HA, 1 ) produced by the biocontrol fungus Trichoderma afroharzianum t-22 (Tht22) as a natural product inhibitor of AHAS. The biosynthetic pathway of HA was elucidated with heterologous reconstitution. Guided by a putative self-resistance enzyme in the genome, HA was biochemically demonstrated to be a selective inhibitor of fungal AHAS, including those from phytopathogenic fungi. In addition, HA can inhibit a common resistant variant of AHAS in which the active site proline is mutated. Structural analysis of AHAS complexed with HA revealed the molecular basis of competitive inhibition, which differs from all known commercial AHAS inhibitors. The alternative binding mode also rationalizes the selectivity of HA, as well as effectiveness toward resistant mutants. A proposed role of HA biosynthesis by Tht22 in the rhizosphere is discussed based on the data.

Organizational Affiliation

Biotechnology Research Institute, The Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing 100081, P. R. China.

Macromolecule Content

Total Structure Weight: 153.53 kDa
Atom Count: 9,206
Modelled Residue Count: 1,166
Deposited Residue Count: 1,376
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Acetolactate synthase	A, B	688	Trichoderma harzianum	Mutation(s): 3 Gene Names: CI102_2746 EC: 2.2.1.6
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 8 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
FAD Query on FAD Download Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain O [auth B] MOL2 format, chain E [auth A] MOL2 format, chain O [auth B]	E [auth A], O [auth B]	FLAVIN-ADENINE DINUCLEOTIDE C₂₇ H₃₃ N₉ O₁₅ P₂ VWWQXMAJTJZDQX-UYBVJOGSSA-N		Interactions Focus chain E [auth A] Focus chain O [auth B] Interactions & Density Focus chain E [auth A] Focus chain O [auth B]
TZD (Subject of Investigation/LOI) Query on TZD Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain N [auth B] MOL2 format, chain D [auth A] MOL2 format, chain N [auth B]	D [auth A], N [auth B]	2-{3-[(4-AMINO-2-METHYLPYRIMIDIN-5-YL)METHYL]-4-METHYL-2-OXO-2,3-DIHYDRO-1,3-THIAZOL-5-YL}ETHYL TRIHYDROGEN DIPHOSPHATE C₁₂ H₁₈ N₄ O₈ P₂ S ZGJUYGIRPQSCFA-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Focus chain N [auth B] Interactions & Density Focus chain D [auth A] Focus chain N [auth B]
J3L (Subject of Investigation/LOI) Query on J3L Download Ideal Coordinates CCD File SDF format, chain L [auth B] MOL2 format, chain L [auth B]	L [auth B]	(2S)-3-methyl-2-[[(2S,4R)-1-methyl-4-[(2E,4E)-octa-2,4-dienoyl]-3,5-bis(oxidanylidene)pyrrolidin-2-yl]methyl]-2-oxidanyl-butanoic acid C₁₉ H₂₇ N O₆ QTGRXFMVJJTPSQ-IGSUIHLESA-N		Interactions Focus chain L [auth B] Interactions & Density Focus chain L [auth B]
PEG Query on PEG Download Ideal Coordinates CCD File SDF format, chain G [auth A] MOL2 format, chain G [auth A]	G [auth A]	DI(HYDROXYETHYL)ETHER C₄ H₁₀ O₃ MTHSVFCYNBDYFN-UHFFFAOYSA-N		Interactions Focus chain G [auth A] Interactions & Density Focus chain G [auth A]
SO4 Query on SO4 Download Ideal Coordinates CCD File SDF format, chain F [auth A] MOL2 format, chain F [auth A]	F [auth A]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain F [auth A] Interactions & Density Focus chain F [auth A]
PO4 Query on PO4 Download Ideal Coordinates CCD File SDF format, chain K [auth A] MOL2 format, chain K [auth A]	K [auth A]	PHOSPHATE ION O₄ P NBIIXXVUZAFLBC-UHFFFAOYSA-K		Interactions Focus chain K [auth A] Interactions & Density Focus chain K [auth A]
EDO Query on EDO Download Ideal Coordinates CCD File SDF format, chain H [auth A] SDF format, chain I [auth A] SDF format, chain J [auth A] SDF format, chain P [auth B] SDF format, chain Q [auth B] MOL2 format, chain H [auth A] MOL2 format, chain I [auth A] MOL2 format, chain J [auth A] MOL2 format, chain P [auth B] MOL2 format, chain Q [auth B]	H [auth A], I [auth A], J [auth A], P [auth B], Q [auth B]	1,2-ETHANEDIOL C₂ H₆ O₂ LYCAIKOWRPUZTN-UHFFFAOYSA-N		Interactions Focus chain H [auth A] Focus chain I [auth A] Focus chain J [auth A] Focus chain P [auth B] Focus chain Q [auth B] Interactions & Density Focus chain H [auth A] Focus chain I [auth A] Focus chain J [auth A] Focus chain P [auth B] Focus chain Q [auth B]
MG Query on MG Download Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain M [auth B] MOL2 format, chain C [auth A] MOL2 format, chain M [auth B]	C [auth A], M [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Focus chain M [auth B] Interactions & Density Focus chain C [auth A] Focus chain M [auth B]