An Effective Method for Isolating Ergothioneine Analogues for Use in Peptide Synthesis: 2‐Thiohistidine and Fmoc‐2‐Thiohistidine
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| Natura: | Artículo Open Access |
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Wiley
2026
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| _version_ | 1867009770124214272 |
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| author | Quinn A. Bennett Matthew Chien Erik L. Ruggles Robert J. Hondal Emma J. Barrett |
| author_facet | Quinn A. Bennett Matthew Chien Erik L. Ruggles Robert J. Hondal Emma J. Barrett Quinn A. Bennett Matthew Chien Erik L. Ruggles Robert J. Hondal Emma J. Barrett |
| collection | Wiley Open Access |
| contents | An Effective Method for Isolating Ergothioneine Analogues for Use in Peptide Synthesis: 2‐Thiohistidine and Fmoc‐2‐Thiohistidine Quinn A. Bennett Matthew Chien Erik L. Ruggles Robert J. Hondal Emma J. Barrett Journal of Peptide Science ABSTRACT Here, we report on an improved synthesis of the novel amino acid 2‐thiohistidine and its Fmoc‐derivative through the addition of sodium chloride to the isolation steps of each synthetic procedure. These compounds must be synthesized in either water or a mixture of water/organic solvent and have proven difficult to isolate by traditional methods. We serendipitously discovered that the addition of sodium chloride caused each compound to precipitate from the solution during the workup. Since 2‐thiohistidine is the amino acid analogue of the natural product ergothioneine, we hypothesize that sodium cations mimic the binding of other biologically relevant metal cations to the thioimidazole moiety. Ergothioneine is known to bind Cu + , Zn 2+ , and Hg 2+ , and it may bind other metals. Our fortuitous discovery is not only useful for the isolation and purification of 2‐thiohistidine and its derivatives; peptides that contain this unique amino acid may be designed to take advantage of binding to Group I cations and other metals. 10.1002/psc.70087 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| doi_str_mv | 10.1002/psc.70087 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_psc_70087 |
| institution | Wiley Open Access |
| license_str_mv | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| publishDate | 2026 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | An Effective Method for Isolating Ergothioneine Analogues for Use in Peptide Synthesis: 2‐Thiohistidine and Fmoc‐2‐Thiohistidine Quinn A. Bennett Matthew Chien Erik L. Ruggles Robert J. Hondal Emma J. Barrett Journal of Peptide Science An Effective Method for Isolating Ergothioneine Analogues for Use in Peptide Synthesis: 2‐Thiohistidine and Fmoc‐2‐Thiohistidine Quinn A. Bennett Matthew Chien Erik L. Ruggles Robert J. Hondal Emma J. Barrett Journal of Peptide Science ABSTRACT Here, we report on an improved synthesis of the novel amino acid 2‐thiohistidine and its Fmoc‐derivative through the addition of sodium chloride to the isolation steps of each synthetic procedure. These compounds must be synthesized in either water or a mixture of water/organic solvent and have proven difficult to isolate by traditional methods. We serendipitously discovered that the addition of sodium chloride caused each compound to precipitate from the solution during the workup. Since 2‐thiohistidine is the amino acid analogue of the natural product ergothioneine, we hypothesize that sodium cations mimic the binding of other biologically relevant metal cations to the thioimidazole moiety. Ergothioneine is known to bind Cu + , Zn 2+ , and Hg 2+ , and it may bind other metals. Our fortuitous discovery is not only useful for the isolation and purification of 2‐thiohistidine and its derivatives; peptides that contain this unique amino acid may be designed to take advantage of binding to Group I cations and other metals. 10.1002/psc.70087 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| title | An Effective Method for Isolating Ergothioneine Analogues for Use in Peptide Synthesis: 2‐Thiohistidine and Fmoc‐2‐Thiohistidine |
| topic | Journal of Peptide Science |
| url | https://onlinelibrary.wiley.com/doi/10.1002/psc.70087 |