6ZRX image
Entry Detail
PDB ID:
6ZRX
Keywords:
Title:
Crystal structure of 6-dimethylallyltryptophan synthase from Micromonospora olivasterospora in complex with DMASPP and Trp
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2020-07-15
Release Date:
2020-12-09
Method Details:
Experimental Method:
Resolution:
1.70 Å
R-Value Free:
0.23
R-Value Work:
0.20
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:DMATS type aromatic prenyltransferase
Chain IDs:A (auth: AAA), B (auth: BBB), C (auth: CCC), D (auth: DDD)
Chain Length:362
Number of Molecules:4
Biological Source:Micromonospora olivasterospora
Primary Citation
Reprogramming Substrate and Catalytic Promiscuity of Tryptophan Prenyltransferases.
J.Mol.Biol. 433 166726 166726 (2020)
PMID: 33249189 DOI: 10.1016/j.jmb.2020.11.025

Abstact

Prenylation is a process widely prevalent in primary and secondary metabolism, contributing to functionality and chemical diversity in natural systems. Due to their high regio- and chemoselectivities, prenyltransferases are also valuable tools for creation of new compounds by chemoenzymatic synthesis and synthetic biology. Over the last ten years, biochemical and structural investigations shed light on the mechanism and key residues that control the catalytic process, but to date crucial information on how certain prenyltransferases control regioselectivity and chemoselectivity is still lacking. Here, we advance a general understanding of the enzyme family by contributing the first structure of a tryptophan C5-prenyltransferase 5-DMATS. Additinally, the structure of a bacterial tryptophan C6-prenyltransferase 6-DMATS was solved. Analysis and comparison of both substrate-bound complexes led to the identification of key residues for catalysis. Next, site-directed mutagenesis was successfully implemented to not only modify the prenyl donor specificity but also to redirect the prenylation, thereby switching the regioselectivity of 6-DMATS to that of 5-DMATS. The general strategy of structure-guided protein engineering should be applicable to other related prenyltransferases, thus enabling the production of novel prenylated compounds.

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