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  • Title: Use of Tn5tac1 to clone a pel gene encoding a highly alkaline, asparagine-rich pectate lyase isozyme from an Erwinia chrysanthemi EC16 mutant with deletions affecting the major pectate lyase isozymes.
    Author: Alfano JR, Ham JH, Collmer A.
    Journal: J Bacteriol; 1995 Aug; 177(15):4553-6. PubMed ID: 7635842.
    Abstract:
    Erwinia chrysanthemi mutant CUCPB5047, delta(pelA pelE) delta(pelB pelC)::28bp delta(pelX) delta 4bp pehX::omega Cmr, was constructed, mutated with Tn5tac1, and screened for isopropyl-beta-D-thiogalactopyranoside-dependent pectate lyase (Pel) production. A Kmr SacI fragment from the hyperexpressing Pel+ mutant CUCPB5066 was cloned into Escherichia coli and sequenced. The gene identified, pelL, encodes a novel, asparagine-rich, highly alkaline enzyme that is similar in primary structure to PelX and in enzymological properties to PelE.
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