2023
DOI: 10.1007/s10858-023-00420-9
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Improved spectral resolution of [13C,1H]-HSQC spectra of aromatic amino acid residues in proteins produced by cell-free synthesis from inexpensive 13C-labelled precursors

Abstract: Cell-free protein synthesis using eCells allows production of amino acids from inexpensive 13C-labelled precursors. We show that the metabolic pathway converting pyruvate, glucose and erythrose into aromatic amino acids is maintained in eCells. Judicious choice of 13C-labelled starting material leads to proteins, where the sidechains of aromatic amino acids display [13C,1H]-HSQC cross-peaks free of one-bond 13C–13C couplings. Selective 13C-labelling of tyrosine and phenylalanine residues is achieved simply by … Show more

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Cited by 4 publications
(2 citation statements)
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“…Enzymatic methods have facilitated access to 13 C-labelled metabolites, such as monosaccharides [163], as well as 13 C-labelled amino acids [164][165][166][167]. The use of very simple and inexpensive 13 C-labelled precursors is thereby attractive, such as 13 C-labelled pyruvate for the enzymatic synthesis of 13 C-labelled aromatic amino acids [168]. Direct utilization of 13 carbon dioxide is not only of significant interest for investigating the metabolism of photosynthetic organisms, but also for the biocatalytic synthesis of 13 C-labelled biochemicals, such as 13 C-labelled L-malate [169].…”
Section: Synthesis Of Isotope-labelled Metabolitesmentioning
confidence: 99%
“…Enzymatic methods have facilitated access to 13 C-labelled metabolites, such as monosaccharides [163], as well as 13 C-labelled amino acids [164][165][166][167]. The use of very simple and inexpensive 13 C-labelled precursors is thereby attractive, such as 13 C-labelled pyruvate for the enzymatic synthesis of 13 C-labelled aromatic amino acids [168]. Direct utilization of 13 carbon dioxide is not only of significant interest for investigating the metabolism of photosynthetic organisms, but also for the biocatalytic synthesis of 13 C-labelled biochemicals, such as 13 C-labelled L-malate [169].…”
Section: Synthesis Of Isotope-labelled Metabolitesmentioning
confidence: 99%
“…Enzymatic methods have facilitated access to 13 C-labelled metabolites, such as monosaccharides [132] as well as 13 C-labelled amino acids [133][134][135][136]. The use of very simple and inexpensive 13 C-labelled precursors is thereby attractive, such as 13 C-labelled pyruvate for the enzymatic synthesis of 13 C-labelled aromatic amino acids [137]. Direct utilization of 13 carbon dioxide is not only of much interest for investigating the metabolism of photosynthetic organisms, but also for the biocatalytic synthesis of 13 C-labelled biochemicals, such as 13 C-labelled L-malate [138].…”
Section: Synthesis Of Isotope-labelled Metabolitesmentioning
confidence: 99%