Journal
AUSTRALIAN JOURNAL OF CHEMISTRY
Volume 74, Issue 10, Pages 740-745Publisher
CSIRO PUBLISHING
DOI: 10.1071/CH21218
Keywords
tyrosyl-tRNA synthetase; enzyme selectivity; amino acids; species selectivity
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Using thermodynamic techniques, it was found that the non-proteinogenic amino acids m-fluorotyrosine and 2,4-dihydroxyphenylalanine exhibited higher binding affinity to the tyrosyl-tRNA synthetase from Escherichia coli than to that from human cytosol.
The non-proteinogenic amino acids m-fluorotyrosine and 2,4-dihydroxyphenylalanine demonstrated a respective 6- and 12-fold greater binding affinity to the purified tyrosyl-tRNA synthetase from Escherichia coli than that from human cytosol. The differential binding was identified by probing the substrate selectivity of the two enzymes with structural analogues of tyrosine using a thermodynamic technique.
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