Formation of benzaldehyde by Pseudomonas putida ATCC 12633

Simmonds, J. and Robinson, Gary K. (1998) Formation of benzaldehyde by Pseudomonas putida ATCC 12633. Applied Microbiology and Biotechnology, 50 (3). pp. 353-358. ISSN 0175-7598. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Aromatic and heterocyclic aldehydes may be produced by the mandelate pathway of Pseudomonas putida ATCC 12633 via the biotransformation of benzoyl formate and substrate analogues. Under optimised biotransformation conditions (37 degrees C, pH 5.4) and with benzoyl formate as a substrate, benzaldehyde may be accumulated with yields above 85%. Benzaldehyde is toxic to P. putida ATCC 12633; levels above 0.5 g/l (5 mM) reduce the biotransformation activity. Total activity loss occurs at an aldehyde concentration of 2.1 g/l (20 mM). To overcome this limitation, the rapid removal of the aldehyde is desirable via in situ product removal. The biotransformation of benzoyl formate (working volume 1 l) without in situ product removal accumulates 2.1 g/l benzaldehyde. Benzaldehyde removal by gas stripping produces a total of 3.5 g/l before inhibition. However, the most efficient method is solid-phase adsorption using activated charcoal as the sorbant, this allows the production of over 4.1 g/l benzaldehyde. Addition of bisulphite as a complexing agent causes inhibition of the biotransformation and bisulphite is therefore is not suitable for in situ product removal.

Item Type: Article
Subjects: Q Science > QP Physiology (Living systems) > QP517 Biochemistry
Q Science > QR Microbiology
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Depositing User: Tara Puri
Date Deposited: 03 Jul 2009 09:45
Last Modified: 05 Jun 2014 10:26
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