• Bioorg. Med. Chem. Lett. · Nov 2007

    Fluorinated chloramphenicol acetyltransferase thermostability and activity profile: improved thermostability by a single-isoleucine mutant.

    • Natalya Voloshchuk, Man Xia Lee, Wan Wen Zhu, Ismet Caglar Tanrikulu, and Jin Kim Montclare.
    • Department of Chemical and Biological Sciences, Polytechnic University, 6 Metrotech Center, Brooklyn, NY 11201, USA.
    • Bioorg. Med. Chem. Lett. 2007 Nov 1; 17 (21): 5907-11.

    AbstractA lysate-based thermostability and activity profile is described for chloramphenicol acetyltransferase (CAT) expressed in trifluoroleucine, T (CAT T). CAT and 13 single-isoleucine CAT mutants were expressed in medium supplemented with T and assayed for thermostability on cell lysates. Although fluorinated mutants, L82I T and L208I T, showed losses in thermostability, the L158I T fluorinated mutant demonstrated an enhanced thermostability relative to CAT T. Further characterization of L158I T suggested that T at position 158 contributed to a portion of the observed loss in thermostability upon global fluorination.

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