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Title:Investigation of the Enzymes Involved in Lantibiotic Biosynthesis: Lacticin 481 and Haloduracin
Author(s):Ihnken, Leigh Anne Furgerson
Doctoral Committee Chair(s):van der Donk, Wilfred A.
Department / Program:Chemistry
Discipline:Chemistry
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Chemistry, Biochemistry
Abstract:Finally, removal of the leader peptide from the modified precursor peptides is the final step in the maturation of lantibiotics, and is required for achievement of full biological activity. In lacticin 481 maturation, this peptide cleavage reaction is performed by the N-terminal protease domain of the lacticin 481 transporter, LctT. The activity of the protease domain of LctT was reconstituted in vitro and its substrate specificity was probed with numerous variants of the lacticin 481 precursor peptide. The N-terminal 150 amino acids of LctT were able to process most LctA mutant peptides, with the exception of peptides containing mutations at the double glycine motif located at the junction between leader sequence and structural region. Cys protease activity was confirmed for LctT as mutation of Cys12 to Ser or Ala abolished protease activity.
Issue Date:2009
Type:Text
Language:English
Description:140 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009.
URI:http://hdl.handle.net/2142/84344
Other Identifier(s):(MiAaPQ)AAI3392075
Date Available in IDEALS:2015-09-25
Date Deposited:2009


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