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Journal of Bacteriology, December 2000, p. 6850-6853, Vol. 182, No. 23
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Secretion of an Acid Phosphatase (SapM) by Mycobacterium tuberculosis That Is Similar to Eukaryotic Acid Phosphatases

Mazen T. Saleh and John T. Belisle*

Department of Microbiology, Colorado State University, Fort Collins, Colorado 80523-1677

Received 10 July 2000/Accepted 22 September 2000

Mycobacterium tuberculosis secretes a large number of polypeptides with broad biological and immunological functions. We describe here the characterization of a 28-kDa acid phosphatase of M. tuberculosis (SapM) localized to the culture filtrate. The mature protein demonstrated biochemical characteristics similar to those of the bacterial nonspecific acid phosphatases. However, SapM yielded significant sequence homology to fungal acid phosphatases and not those of bacteria. Thus, SapM may represent a new class of bacterial nonspecific acid phosphatases.

* Corresponding author. Mailing address: Department of Microbiology, Colorado State University, Fort Collins, CO 80523-1677. Phone: (970) 491-6549. Fax: (970) 491-1815. E-mail: jbelisle{at}cvmbs.colostate.edu.

Journal of Bacteriology, December 2000, p. 6850-6853, Vol. 182, No. 23
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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