2003 Volume 67 Issue 2 Pages 368-371
In Escherichia coli cells carrying wild-type ovalbumin cDNA, some of the recombinant protein was secreted into the periplasmic space. In contrast, a signal-region mutant form of ovalbumin (deletion, Gly1 to Ala39) was not detected in the periplasm despite being synthesized at the same level as the wild-type protein. Chemical and spectroscopic analyses showed that periplasmic ovalbumin assumes a conformation indistinguishable from that of native egg white ovalbumin. We concluded that a process resembling the secretion of ovalbumin process in the oviduct occurs also in bacteria.
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