4ZFL

Ergothioneine-biosynthetic Ntn hydrolase variant EgtC_C2A with natural substrate

Summary for 4ZFL

• Entry DOI: 10.2210/pdb4zfl/pdb
• Related: 4ZFJ 4ZFK
• Descriptor: Amidohydrolase EgtC, (1S)-1-carboxy-4-({(1R)-1-carboxy-2-[(S)-{4-[(2S)-2-carboxy-2-(trimethylammonio)ethyl]-1H-imidazol-2-yl}sulfinyl]ethyl}amino)-4-oxobutan-1-aminium, GLYCEROL, ... (4 entities in total)
• Functional Keywords: ntn hydrolase, ergothioneine biosynthesis, sulfur chemistry, mycobacteria, hydrolase
• Biological source: Mycobacterium smegmatis (strain ATCC 700084 / mc(2)155)
• Total number of polymer chains: 12
• Total formula weight: 306856.74

Authors

Vit, A.,Seebeck, F.P.,Blankenfeldt, W. (deposition date: 2015-04-21, release date: 2015-07-01, Last modification date: 2024-01-10)

Primary citation

Vit, A.,Mashabela, G.T.,Blankenfeldt, W.,Seebeck, F.P.
Structure of the Ergothioneine-Biosynthesis Amidohydrolase EgtC.
Chembiochem, 16:1490-1496, 2015

PubMed Abstract: The ubiquitous sulfur metabolite ergothioneine is biosynthesized by oxidative attachment of a sulfur atom to the imidazole ring of Nα-trimethylhistidine. Most actinobacteria, including Mycobacterium tuberculosis, use γ-glutamyl cysteine as a sulfur donor. In subsequent steps the carbon scaffold of γ-glutamyl cysteine is removed by the glutamine amidohydrolase EgtC and the β-lyase EgtE. We determined the crystal structure of EgtC from Mycobacterium smegmatis in complex with its physiological substrate. The set of active site residues that define substrate specificity in EgtC are highly conserved, even in homologues that are not involved in ergothioneine production. This conservation is compounded by the phylogenetic distribution of EgtC-like enzymes indicates that their last common ancestor might have emerged for a purpose other than ergothioneine production.

PubMed: 26079795
DOI: 10.1002/cbic.201500168

Experimental method

X-RAY DIFFRACTION (1.7 Å)