8HJZ image
Deposition Date 2022-11-24
Release Date 2023-06-14
Last Version Date 2024-11-20
Entry Detail
PDB ID:
8HJZ
Title:
Crystal structure of a cupin protein (tm1459, H52A/H58Q mutant) in copper (Cu) substituted form
Biological Source:
Source Organism:
Method Details:
Experimental Method:
Resolution:
1.22 Å
R-Value Free:
0.18
R-Value Work:
0.15
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Cupin_2 domain-containing protein
Gene (Uniprot):Tmari_1465
Mutations:H52A/H58Q
Chain IDs:A, B
Chain Length:118
Number of Molecules:2
Biological Source:Thermotoga maritima MSB8
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
CSD A CYS modified residue
Ligand Molecules
Primary Citation
An artificial metallolyase with pliable 2-His-1-carboxylate facial triad for stereoselective Michael addition.
Chem Sci 14 3932 3937 (2023)
PMID: 37035687 DOI: 10.1039/d2sc06809e

Abstact

We repurposed the metal-binding site of a cupin superfamily protein into the 2-His-1-carboxylate facial triad, which is one of the common motifs in natural non-heme enzymes, to construct artificial metalloenzymes that can catalyze new-to-nature reactions. The Cu2+-H52A/H58E variant catalyzed the stereoselective Michael addition reaction and was found to bear a flexible metal-binding site in the high-resolution crystal structure. Furthermore, the H52A/H58E/F104W mutant accommodated a water molecule, which was supported by Glu58 and Trp104 residues via hydrogen bonding, presumably leading to high stereoselectivity. Thus, the 2-His-1-carboxylate facial triad was confirmed to be a versatile and promising metal-binding motif for abiological and canonical biological reactions.

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Primary Citation of related structures