high-energy compounds

(redirected from energy-rich bond)
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high-en·er·gy com·pounds

classically, a group of phosphoric esters whose hydrolysis takes place with a standard free-energy change of -5 to -15 kcal/mol (or -20 to -63 kJ/mol), in contrast to -1 to -4 kcal/mol (or -4 to -17 kJ/mol) for simple phosphoric esters such as glucose 6-phosphate or α-glycerophosphates, and are thus capable of driving energy-consuming reactions in living cells or reconstituted cell-free systems; adenosine 5'-triphosphate, with respect to the β- and γ-phosphates, is the best known and is regarded as the immediate energy source for most metabolic syntheses. Other examples include acid anhydrides, phosphoric esters of enols, phosphamic acid (R-NH-PO3H2) derivatives, acyl thioesters (for example, of coenzyme A), sulfonium compounds (R3-S+), and aminoacyl esters of ribosyl moieties.
See also: high-energy phosphates.

high-en·er·gy com·pounds

(hī-en'ĕr-jē kom'powndz)
Classically, a group of phosphoric esters the hydrolysis of which takes place with a standard free energy change of -5 to -15 kcal/mol (or -20 to -63 kJ/mol) (in contrast to -1 to -4 kcal/mol, or -4 to -17 kJ/mol) for simple phosphoric esters like glucose 6-phosphate or α-glycerophosphates, thus being capable of driving energy-consuming reactions in living cells or reconstituted cell-free systems; adenosine 5'-triphosphate, with respect to the β- and γ-phosphates, is the best known and is regarded as the immediate energy source for most metabolic syntheses. Other examples include acid anhydrides, phosphoric esters ofenols, phosphamic acid (R-NH-PO3H2) derivatives, acyl thioesters (e.g., of coenzyme A), sulfonium compounds (R3-S+), and aminoacyl esters of ribosyl moieties.
See also: high-energy phosphates