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Nat Methods. 2006 Apr;3(4):259-61.

Imaging specific cell-surface proteolytic activity in single living cells.

Author information

1
Proteases and Tissue Remodeling Unit, National Institute of Dental and Craniofacial Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 30 Convent Drive, Bethesda, Maryland 20892, USA.

Abstract

We describe a simple, sensitive and noninvasive assay that uses nontoxic, reengineered anthrax toxin-beta-lactamase fusion proteins with altered protease cleavage specificity to visualize specific cell-surface proteolytic activity in single living cells. The assay could be used to specifically image endogenous cell-surface furin, urokinase plasminogen activator and metalloprotease activity. We have adapted the assay for fluorescence microscopy, flow cytometry and fluorescent plate reader formats, and it is amenable for automation and high-throughput analysis.

PMID:
16554829
DOI:
10.1038/nmeth862
[Indexed for MEDLINE]

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