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Molecular investigation of a gene encoding solvent-tolerant alkaline protease from pseudomonas aeruginosa K.

Raja Abdul Rahman , Raja Noor Zaliha and Lee, Poh Geok and Chee, Fah Wong and Basri, Mahiran (2010) Molecular investigation of a gene encoding solvent-tolerant alkaline protease from pseudomonas aeruginosa K. Journal of Basic Microbiology, 50 . pp. 143-149. ISSN 0233-111X

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Abstract

A gene encoding an organic solvent-stable protease was amplified from Pseudomonas aeruginosa strain K by polymerase chain reaction using consensus primers based on multiple sequence alignment of alkaline and metalloprotease genes from Pseudomonas species. The gene, which consisted of 1440 bp nucleotides and deduced 479 amino acid residues, was successfully expressed in pGEX-4T-1 expression system in the presence of 1.0 mM IPTG, after an incubation of 6 h at 37 degrees C. Under these conditions, the recombinant strain K protease was, subsequently, released into the periplasm of E. coli BL21 (DE3) with an optimum proteolytic activity detected at 1.0112 U/ml. To date, this is the first reported expression of alkaline protease (aprA) with such remarkable property in Escherichia coli.

Item Type:Article
Keyword:Pseudomonas aeruginosa; Organic solvent tolerant protease gene; AprA; Expression.
Subject:Pseudomonas aeruginosa.
Subject:Pseudomonas - Molecular aspects.
Faculty or Institute:Faculty of Biotechnology and Biomolecular Sciences
Publisher:Wiley-VCH
ID Code:15709
Deposited By: Nida Hidayati Ghazali
Deposited On:24 Jul 2012 03:18
Last Modified:24 Jul 2012 03:18

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