Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Thioester

Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_1586-3

Definition

Thioesters are esters in which the linking oxygen atom is replaced by sulfur. They are the product of dehydration reaction between a carboxylic acid derivative and a thiol. Thioesters are common intermediates in biochemistry, for example, in acetyl-CoA, malonyl-CoA, acetoacetyl-CoA, and propionyl-CoA. Thioesters are intermediates in several key processes in which ATP is either used or regenerated. Thioesters are involved in the synthesis of all biological esters, including those found in lipids. They also participate in the synthesis of a number of other cellular components, including peptides, fatty acids, sterols, terpenes, and porphyrins. The carbonyl group in thioesters is electrophilic; thus, thioesters and amines combine to give amides:
$$ {\mathrm{R}\mathrm{NH}}_2+{\mathrm{R}}^{\prime }{\mathrm{SCOR}}^{{\prime\prime}}\to {\mathrm{R}\mathrm{NH}\mathrm{COR}}^{{\prime\prime} }+{\mathrm{R}}^{\prime}\mathrm{S}\mathrm{H} $$

Keywords

Carbon Atom Oxygen Atom Carboxylic Acid Carbonyl Group Bioorganic Chemistry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Earth-Life Science Institute (ELSI)Tokyo Institute of TechnologyMeguro-kuJapan
  2. 2.Institute for Advanced StudyPrincetonUSA
  3. 3.Blue Marble Space Institute of ScienceWashingtonUSA
  4. 4.Center for Chemical EvolutionGeorgia Institute of TechnologyAtlantaUSA