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Journal of Bacteriology, October 2002, p. 5814-5817, Vol. 184, No. 20
0021-9193/02/$04.00+0     DOI: 10.1128/JB.184.20.5814-5817.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Secretion of {alpha}-Amylase from Pseudoalteromonas haloplanktis TAB23: Two Different Pathways in Different Hosts

Maria Luisa Tutino,1* Ermenegilda Parrilli,1 Laura Giaquinto,1 Angela Duilio,1 Giovanni Sannia,1 Georges Feller,2 and Gennaro Marino1

Dipartimento di Chimica Organica e Biochimica, Università di Napoli "Federico II"—Complesso Universitario Monte Sant'Angelo, Naples, Italy,1 Laboratoire de Biochimie, Institut de Chimie B6, Université de Liège, Liège, Belgium2

Received 30 May 2002/ Accepted 18 July 2002

Secretion of cold-adapted {alpha}-amylase from Pseudoalteromonas haloplanktis TAB23 was studied in three Antarctic bacteria. We demonstrated that the enzyme is specifically secreted in the psychrophilic hosts even in the absence of a protein domain that has been previously reported to be necessary for {alpha}-amylase secretion in Escherichia coli. The occurrence of two different secretion pathways in different hosts is proposed.

* Corresponding author. Mailing address: Dipartimento di Chimica Organica e Biochimica, Università di Napoli "Federico II"—Complesso Universitario Monte Sant'Angelo, via Cinthia, 80126 Naples, Italy. Phone: 39-081-674317. Fax: 39-081-674313. E-mail: tutino{at}unina.it.

Journal of Bacteriology, October 2002, p. 5814-5817, Vol. 184, No. 20
0021-9193/02/$04.00+0     DOI: 10.1128/JB.184.20.5814-5817.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.





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