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Journal of Bacteriology, August 1999, p. 5090-5093, Vol. 181, No. 16
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Moraxella (Branhamella) catarrhalis BRO beta -Lactamase: a Lipoprotein of Gram-Positive Origin?

Hester J. Bootsma,1,* Piet C. Aerts,1 George Posthuma,2 Theo Harmsen,1 Jan Verhoef,1 Hans van Dijk,1 and Frits R. Mooi1,3

Eijkman-Winkler Institute for Microbiology, Infectious Diseases, and Inflammation, University Hospital Utrecht,1 and Department of Cell Biology and the Graduate School of Biomembranes, Utrecht University,2 Utrecht, and Research Laboratory for Infectious Diseases, National Institute of Public Health and the Environment (RIVM), Bilthoven,3 The Netherlands

Received 22 February 1999/Accepted 2 June 1999

In the past 20 years, BRO beta -lactamase-producing Moraxella catarrhalis strains have emerged. We show that BRO is expressed as a 33-kDa lipoprotein associated with the inner leaflet of the outer membrane. To our knowledge, this is the first description of a lipidated beta -lactamase in a gram-negative species.

* Corresponding author. Mailing address: Eijkman-Winkler Institute for Microbiology, Infectious Diseases, and Inflammation, University Hospital Utrecht, Room G04.614, P.O. Box 85,500, 3508 GA Utrecht, The Netherlands. Phone: (31) (30) 2506525. Fax: (31) (30) 2541770. E-mail: H.J.Bootsma{at}lab.azu.nl.

Journal of Bacteriology, August 1999, p. 5090-5093, Vol. 181, No. 16
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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