5Z0Q image
Deposition Date 2017-12-20
Release Date 2018-11-07
Last Version Date 2023-11-22
Entry Detail
PDB ID:
5Z0Q
Keywords:
TRANSFERASE
Title:
Crystal Structure of OvoB
Biological Source:
Source Organism:
Erwinia tasmaniensis (strain DSM 17950 / CIP 109463 / Et1/99) (Taxon ID: 465817)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.77 Å
R-Value Free:
0.26
R-Value Work:
0.20
R-Value Observed:
0.21
Space Group:
P 1
5Z0Q validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Aminotransferase, class I and II
Gene (Uniprot):ETA_14770
Chain IDs:A (auth: C), B (auth: A), C (auth: B), D, E, F, G, H, I, J, K, L
Chain Length:389
Number of Molecules:12
Biological Source:Erwinia tasmaniensis (strain DSM 17950 / CIP 109463 / Et1/99)
UniProt ID:B2VJB8 Pfam ID:PF00155
Ligand Molecules
PLP
Primary Citation
In Vitro Reconstitution of the Remaining Steps in Ovothiol A Biosynthesis: C-S Lyase and Methyltransferase Reactions.
Org. Lett. 20 5427 5430 (2018)
PMID: 30141637 DOI: 10.1021/acs.orglett.8b02332

Abstact

Ovothiols are thiolhistidine derivatives. The first step of ovothiol biosynthesis is OvoA-catalyzed oxidative coupling between histidine and cysteine. In this report, the remaining steps of ovothiol A biosynthesis were reconstituted in vitro. ETA_14770 (OvoB) was reported as a PLP-dependent sulfoxide lyase, responsible for mercaptohistidine production. OvoA was found to be a bifunctional enzyme, which mediates both oxidative C-S bond formation and methylation of mercaptohistidine to afford ovothiol A. Besides reconstituting the whole biosynthetic pathway, two unique features proposed in the literature were also examined: a potential cysteine-recycling mechanism of the C-S lyase (OvoB) and the selectivity of the π- N methyltransferase.

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Primary Citation of related structures
5Z0Q