6ZJ4 image
Entry Detail
PDB ID:
6ZJ4
Keywords:
Title:
apo-Trehalose transferase (apo-TreT) from Thermoproteus uzoniensis
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2020-06-27
Release Date:
2020-09-30
Method Details:
Experimental Method:
Resolution:
2.10 Å
R-Value Free:
0.25
R-Value Work:
0.20
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Trehalose phosphorylase/synthase
Chain IDs:A (auth: AAA)
Chain Length:400
Number of Molecules:1
Biological Source:Thermoproteus uzoniensis
Ligand Molecules
Primary Citation
Anomeric Selectivity of Trehalose Transferase with Rare l-Sugars.
Acs Catalysis 10 8835 8839 (2020)
PMID: 32953231 DOI: 10.1021/acscatal.0c02117

Abstact

Retaining LeLoir glycosyltransferases catalyze the formation of glycosidic bonds between nucleotide sugar donors and carbohydrate acceptors. The anomeric selectivity of trehalose transferase from Thermoproteus uzoniensis was investigated for both d- and l-glycopyranose acceptors. The enzyme couples a wide range of carbohydrates, yielding trehalose analogues with conversion and enantioselectivity of >98%. The anomeric selectivity inverts from α,α-(1 → 1)-glycosidic bonds for d-glycopyranose acceptors to α,β-(1 → 1)-glycosidic bonds for l-glycopyranose acceptors, while (S)-selectivity was retained for both types of sugar acceptors. Comparison of protein crystal structures of trehalose transferase in complex with α,α-trehalose and an unnatural α,β-trehalose analogue highlighted the mechanistic rationale for the observed inversion of anomeric selectivity.

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Primary Citation of related structures