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Applied and Environmental Microbiology, January 2008, p. 550-552, Vol. 74, No. 2
0099-2240/08/$08.00+0     doi:10.1128/AEM.02105-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

The Weak-Acid Preservative Sorbic Acid Is Decarboxylated and Detoxified by a Phenylacrylic Acid Decarboxylase, PadA1, in the Spoilage Mold Aspergillus niger{triangledown} ,{dagger}

Andrew Plumridge, Malcolm Stratford, Kenneth C. Lowe, and David B. Archer*

School of Biology, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom

Received 14 September 2007/ Accepted 8 November 2007

Resistance to sorbic and cinnamic acids is mediated by a phenylacrylic acid decarboxylase (PadA1) in Aspergillus niger. A. niger {Delta}padA1 mutants are unable to decarboxylate sorbic and cinnamic acids, and the MIC of sorbic acid required to inhibit spore germination was reduced by ~50% in {Delta}padA1 mutants.

* Corresponding author. Mailing address: School of Biology, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom. Phone: 44-115-951-3313. Fax: 44-115-951-3251. E-mail: david.archer{at}nottingham.ac.uk

{triangledown} Published ahead of print on 26 November 2007.

{dagger} Supplemental material for this article may be found at http://aem.asm.org/.

Applied and Environmental Microbiology, January 2008, p. 550-552, Vol. 74, No. 2
0099-2240/08/$08.00+0     doi:10.1128/AEM.02105-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.



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