Abstract
The peh gene, encoding polygalacturonase (Peh), was identified in Erwinia carotovora strain EC and cloned in Escherichia coli. Recombinant Peh (re-Peh) was purified from E. coli strain 706 containing peh on a recombinant plasmid. The activity of the re-Peh protein is optimal at pH 5.5. The N-terminal and internal amino acid (aa) sequences of re-Peh were determined and compared to the aa sequence deduced from the nucleotide (nt) sequence of the cloned peh. The re-Peh has no similarity, based on either the nt sequences or the deduced aa sequences, to pectate lyases from the same Er. carotovora strain or other organisms.
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