An endo-acting family 3 pectate lyase (PL I) gene from Streptomyces thermocarboxydus was cloned and expressed in Escherichia coli. The deduced PL I sequence had highest similarity to a putative pectate lyase of S. coelicolor. Recombinant PL I had significantly lower specific activity, probably a result of incorrect folding, as indicated by circular dichroism spectra analysis.
