8IVE image
Entry Detail
PDB ID:
8IVE
Keywords:
Title:
crystal structure of SulE mutant
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2023-03-27
Release Date:
2023-08-02
Method Details:
Experimental Method:
Resolution:
1.44 Å
R-Value Free:
0.19
R-Value Work:
0.17
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Alpha/beta fold hydrolase
Mutations:P44R,S209A,H333A
Chain IDs:A, B
Chain Length:370
Number of Molecules:2
Biological Source:Hansschlegelia zhihuaiae
Primary Citation
Crystal structures of herbicide-detoxifying esterase reveal a lid loop affecting substrate binding and activity.
Nat Commun 14 4343 4343 (2023)
PMID: 37468532 DOI: 10.1038/s41467-023-40103-5

Abstact

SulE, an esterase, which detoxifies a variety of sulfonylurea herbicides through de-esterification, provides an attractive approach to remove environmental sulfonylurea herbicides and develop herbicide-tolerant crops. Here, we determined the crystal structures of SulE and an activity improved mutant P44R. Structural analysis revealed that SulE is a dimer with spacious binding pocket accommodating the large sulfonylureas substrate. Particularly, SulE contains a protruding β hairpin with a lid loop covering the active site of the other subunit of the dimer. The lid loop participates in substrate recognition and binding. P44R mutation altered the lid loop flexibility, resulting in the sulfonylurea heterocyclic ring repositioning to a relative stable conformation thus leading to dramatically increased activity. Our work provides important insights into the molecular mechanism of SulE, and establish a solid foundation for further improving the enzyme activity to various sulfonylurea herbicides through rational design.

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