Metal Ion Catalysis edit
The presence of a metal ion in the active site participates in catalysis by coordinating charge stabilization and shielding. Because of a metal's positive charge, only negative charges can be stabilized through metal ions. [1] Metal ions can also act to ionize water by acting as a Lewis acid [2]. Metal ions may also be agents of oxidation and reduction[3].
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- ^ Piccirilli, Joseph A.; Vyle, Joseph S.; Caruthers, Marvin H.; Cech, Thomas R. (1993-01-07). "Metal ion catalysis in the Tetrahymena ribozyme reaction". Nature. 361 (6407): 85–88. doi:10.1038/361085a0.
- ^ Fife, Thomas H.; Przystas, Theodore J. (1985-02-01). "Divalent metal ion catalysis in the hydrolysis of esters of picolinic acid. Metal ion promoted hydroxide ion and water catalyzed reactions". Journal of the American Chemical Society. 107 (4): 1041–1047. doi:10.1021/ja00290a048. ISSN 0002-7863.
- ^ Stadtman, E. R. (1990-01-01). "Metal ion-catalyzed oxidation of proteins: biochemical mechanism and biological consequences". Free Radical Biology & Medicine. 9 (4): 315–325. ISSN 0891-5849. PMID 2283087.